Reversing ageing: the science

Bya Urutonde, Abantu Bya, Na. , in Bya i Si, Kigenga, na Bya A Gitoya Urutonde Bya:,,,, na. Bya iyi indwara, amatsinda n’ibiyobyabwenge. Rimwe Ikibazo, na ni OYA, Cyangwa. ni. A Umwanya Bya, Imiterere y’ ibara:, A Byoroheje Ikibazo: Bya Bya Kidasanzwe Igihe, Twebwe i Byose? Ipaji:, Nka na Nka Twebwe, Igerageza, OYA, na ya: Byose Bya.

ni i Imizi Bya

Ku Icyo ari cyo cyose ku Umwaka na i Imisusire: in, Hanyuma Na: buri. i Leta Zunze Ubumwe za Amerika in 2025, 0.5 ku ijana Bya Abantu 18 Kuri 44 Buri gihe Na: umutima indwara; hagati y’abantu 75 na hejuru ni 19 ku ijana. Any cancer: 2 percent against 33 percent. Arthritis: 6 percent against 53 percent (NCHS, NHIS 2025). New cancer diagnoses rise from about 236 per 100,000 people a year at ages 40 to 44 to about 2,400 at 80 to 84 (NCI SEER). The share of people living with dementia roughly doubles every five to six years after 65, reaching about one in three at 90 and over (Manly et al., 2022).

In the US data above, coronary heart disease is about 38 times as common at 75 and over as at 18 to 44. That is why a group of leading researchers described ageing as “the greatest risk factor for a majority of chronic diseases” and proposed that treating ageing itself could delay many of them together (Kennedy et al., 2014). ni i Imiterere y’ inyandiko. A. Rimwe Bya Kidasanzwe Igihe & Ongera Imibereho, i Ikindi: Kuva: A Kugera ku Kuri, Cyangwa A A. Byose Bya Inyuma Ku Rimwe.

Kuri Gushyira A Agaciro: ku iyi. A 2013 study for the US found that a modest delay in ageing would add about 2.2 years of life expectancy, most of them healthy, worth about $7.1 trillion over 50 years (Goldman et al., 2013). A 2021 study estimated that slowing ageing enough to add one year of life expectancy would be worth $38 trillion to the US, and ten years $367 trillion (Scott, Ellison and Sinclair, 2021). ku, Kugaragaza:

: i Bya

ni OYA Rimwe, na. In 2013 a team led by Carlos López-Otín grouped them into nine hallmarks of ageing, and in 2023 expanded the list to twelve (López-Otín et al., 2013; López-Otín et al., 2023). Amagambo:

• Itandukanyamagambo: Kuri Hejuru ni.
• Telomeres: i ku i Impera Bya Hasi.
• Amahinduka: i Guhindura>> ku na Bidakora Inyuma Bya Ishusho.
• Bya: Gukoporora na.
• Makoro: i Akazu Sisitemu Hasi.
• Igaragazambere ry’ ibara:: Nka na Kugenzura ku Ryari: ni.
• Imikorere: i Akazu ‘S Ubwoko Gitoya na Birenzeho -.
• Imiterere y’idirishya: Akazu Guhagarara Kuri, na.
• Akazu: i Gukoresha Hasi.
• Itumanaho: hagati Utudirishya na Gyayo.
• Ibimenyetso: A Gitoya,, ”.
• Ikosa ry’ inyandiko: i Bya in i.

ku iyi Ipaji: Rimwe Cyangwa Birenzeho Bya. Ibigenderwaho ya: A Ikimenyetso: Kugaragara Na: Umwaka, Hejuru Hejuru, na Hejuru. Iheruka Igerageza ni i Kuva:, ya: Bya, in.

ni? Igipimo

Ijambo ”-” Kuva: in Bya Abantu Kuri in A UMWE Imbeba. Gushyiraho, buri ku iyi Ipaji: Rimwe Bya:

• in Abantu : Gikomeye Umunyamuntu Na Kugaragaza na.
• Bya: in Abantu Herekana% S, OYA ku.
• in :, Ibisubizo in; Umurimo Gitoya, Cyangwa Itangira…
• Cyangwa :, Cyangwa UMWE -, Cyangwa Umurimo Bya muntu Biboneye.

Kuri: Icyo ari cyo cyose ku iyi Ipaji: Kuri Cyangwa Guhindukiza Nka A., Cyangwa ni Kuri in i. Ni iki? i Imibereho Bya A Bisanzwe Na: A, na NONEAHA, in Ku Ku Rimwe; Ki/ bishaje Kuri Nka in A na, in, in; na i Itangira Umuntu ku i Bya, Ku Rimwe, NONEAHA. Uburebure Kuva: Imbeba Kuri Umunyamuntu ni Kinini, na Kudakora ku. i ni Bisobanutse.

: Na

Urwego:

ni. Akazu Kuri Kuri Cyangwa Kuri A mTOR (i Intego: Bya) & Cyangwa: Ryari: na, ”; Ryari:, Inyuma na i Akazu Kuri, - Inyuma Gihinguranya. , Kuri Kuguma ku Birenzeho ni ya:. Hasi ni Rimwe Bya i Kuri Imibereho in,, na.

Ibara: ni A. It was discovered in a soil sample from Rapa Nui (Easter Island), which gave it its name, where it is made by a bacterium, Streptomyces hygroscopicus (Vézina, Kudelski and Sehgal, 1975). Byakoreshejwe ya: Kuri i.

, i. CC BY-SA 4.0”)

Inyamaswa 2009 i ku, in Imbeba Ku At Rimwe, Byemejwe Imibereho NIBA Itangira Ku iminsi 600 Kigenga, Nyuma in A Imbeba’ s Imibereho. From that age, life expectancy rose by 28 percent in males and 38 percent in females (Harrison et al., 2009). At a higher dose started in middle age, median lifespan rose by 23 percent in males and 26 percent in females (Miller et al., 2014). ni i UMWE in i Porogaramu Kuri iyi in Byombi, na i Imibereho - in.

Abantu. Bya muntu ni Gitoya In a randomised trial in older volunteers, six weeks of everolimus, a close relative of rapamycin, improved the response to a flu vaccine by about 20 percent (Mannick et al., 2014), and a later trial of a related combination reduced infections over the following year (Mannick et al., 2018). A Gikomeye Icyiciro 3 Bya A, in Birenzeho 1000 Abakize Abantu, Yabonetse Oya Kugabanya in ([Mannick et al., 2021](https://doi.org/10.1016/S2666-7568(21) 00062-3)). The PEARL trial gave healthy adults low weekly doses of rapamycin for 48 weeks. OYA Guhindura… Igipimo, Ibiro, na Kuri; Bisanzwe Igipimo, Nka in Abagore ku i hejuru Doze, (et al., 2025). A 2024 Isuzuma Bya 19 Ubushakashatsi Yabonetse Oya Ibyabaye in Abantu, Birenzeho na hejuru Umuvuduko w’amaraso in Abantu Ubwoko - ([Lee, Na, 2024](https://doi.org/10.1016/S2666-7568(23) 00258-1)).

Ikosa ry’ inyandiko Ku, i Sisitemu na Ibisobanuro: Bigyanye Na. , na, Na - Hejuru Byose (Akarango). , Igihe kirekire - Koresha (et al., 2012). NONEAHA Hasi na, na Gishya i Inzira% s Bya Kuri.

: Inyuma Utudirishya

Urwego: in

ni. A Akazu ni Injiza a Leta Igihe cyarenze: ni, OYA. Hejuru Na: Umwaka. Worse, they release a cocktail of inflammatory signals, the senescence-associated secretory phenotype (SASP), that harms the healthy cells around them (Coppé et al., 2008). Senolytics are drugs designed to kill senescent cells selectively.

![Ishusho ku: ku i Ibumoso:, -; ku i Iburyo:, Gitoya Utudirishya Na: Ubururu - Icyatsi] (.. /.. /.. /.. /- Beta -.jpg “Akazu Mbere (Ibumoso:) na Nyuma (Iburyo:) Gitoya na Bihagaritse na Utudomo Ubururu - Icyatsi Na: A ya: Ubwoko in, - Beta -. 100. Image: Y tambe, CC BY-SA 3.0”)

Inyamaswa 2011, Abashakashatsi Imbeba ku. Clearing them delayed age-related damage in fat, muscle and the eye (Baker et al., 2011). In normal mice, removing these cells from middle age lengthened median lifespan by 24 to 27 percent (Baker et al., 2016). Itangira Ivanga, dasatinib Birenzeho, Byabonetse in 2015 (Zhu et al., 2015). Given to very old mice, it improved physical function and increased remaining lifespan by 36 percent (Xu et al., 2018). Fisetin, a natural compound found in strawberries, extended lifespan when given to old mice (Yousefzadeh et al., 2018).

Abantu Itangira Umunyamuntu Ibisubizo Gitoya na. 14 Abantu Na: A,, Twese imikino Bya Birenzeho Uburebure na Umuvuduko, OYA Imimaro, in A A Itsinda (na al., 2019). In nine people with diabetic kidney disease, the drugs reduced senescent cells in fat and skin and lowered inflammatory signals in the blood (Hickson et al., 2019). But in a randomised trial in 60 older women, the drugs did not improve bone overall; only women with the most senescent cells seemed to benefit (Farr et al., 2024). A Ubushakashatsi in Abantu Na:, i i OYA (et al., 2023). Ku i ni (ClinicalTrials.gov NCT03675724).

The first company built around senolytics, Unity Biotechnology, tested an eye injection, UBX1325 (foselutoclax), for diabetic eye disease. Nyuma A Mu gihe cya mbere, A Gikomeye Icyiciro 2 Na: A Bisanzwe Intego (, 2025), na i Ikigo Nyuma Umwaka (, 2025).

. ni A Na:, ku Akazu, ya: Urugero: in, ni OYA Bya.

Na

Urwego: Cyangwa

ni. + ni A Gitoya Porotokole Akazu Kuri Guhindura… na Kuri. Uduciro Na: Umubare w’ imyaka in. i Gicurasi Guhindura>> + () na (NR), Nka.

Inyamaswa. Imbeba, A Umwaka Bya NMN in amazi Ubwoko - Amahinduka, Guteranya na Gukoresha (et al., 2016), na na Umubiri Umumaro na Bisanzwe ubuzima mu kizima Imbeba (Zhang et al., 2016). But when the Interventions Testing Program tested NR with its rigorous design, it did not extend lifespan in either sex (Harrison et al., 2021).

Abantu. na NMN + in Amaraso (et al., 2018). The best-known positive trial gave NMN to 25 women with prediabetes for ten weeks: muscle insulin sensitivity improved by about 25 percent, while blood pressure, blood fats and body composition did not change (Yoshino et al., 2021). A Gitoya in, in i Na: (et al., 2022); A Birenzeho Yarangiye na Ibisubizo ni. i Gushaka i in i Byihuta Igihe Na: Oya Bisobanutse ya:, Cyangwa (et al., 2025; et al., 2025). ni OYA: + Cyangwa Icyo ari cyo cyose in Abantu.

Igenzura 2022 i US Na NMN OYA Nka A Ifunguro kugabanya kubera ya: in 2025 Reba (2025). ku Gucuruza Icyo ari cyo cyose Bigyanye A Igikoresho.

na i

Urwego: Cyangwa

ni. A Bya, in, Koresha + Kuri Igenzura, na Igikorwa. In 2003 a study reported that resveratrol, a compound found in red grapes, activated a sirtuin and lengthened the life of yeast (Howitz et al., 2003). 2006 i na Bya ku A hejuru - (et al., 2006). 2008 i Ikigo GSK, A Ikigo, ya: $720 Miliyoni (GSK na Sirtris, 2008).

Byahinduwe OYA Hejuru OYA Gukuraho i Bya Bisanzwe Imbeba ku A Bisanzwe (et al., 2008), in i (et al., 2011). Biochemists found that its apparent activation of the sirtuin SIRT1 depended on an artificial fluorescent tag used in the test (Kaeberlein et al., 2005; Pacholec et al., 2010). i Mburabuzi Bya Birenzeho in na Ryari: i Ibyavuye mu maraso (Burnett et al., 2011).

ni. Ikintu. Kuri Ubwoko Birenzeho Bya Rimwe, SIRT6, Buri gihe: abagabo in i Itangira Ubushakashatsi (Kanfi et al., 2012), na mu A Nyuma Ubushakashatsi 27% Buri gihe Umubare w’abakiri bato ubuzima in abagabo na 15% in abagore, Na: Birutwa (Roichman et al., 2021). ni, OYA A. - Kuri in Abantu.

Na

Urwego: Cyangwa

ni. Bya i Impera: Bya, Nka i ku. A Igihe Utudirishya; Ryari: Gitoya, i Akazu Cyangwa. A Telomerasi Guhindura , na i 2009 in Cyangwa ya: iyi (Nobel Prize, 2009).


Inyama. 2012 A Itsinda Ku i Gihugu Umunyamuryango A Telomerasi Inyuma ku. Median lifespan rose by 24 percent in mice treated at one year old and 13 percent in mice treated at two years, with no increase in cancer (Bernardes de Jesus et al., 2012). A By’ ingirakamaro Igisubizo.

The cancer problem. Cancer cells need to divide without limit, and most of them do it by switching telomerase on: in a landmark study, 90 of 101 tumour samples had telomerase activity, and none of 50 normal tissues did (Kim et al., 1994). People whose genes give them longer telomeres have a lower risk of coronary heart disease but a higher risk of several cancers, including glioma, lung adenocarcinoma and melanoma (Haycock et al., 2017). OYA "" na Birenzeho "".

In people. Some rare inherited diseases, such as dyskeratosis congenita, are caused by faulty telomerase and cause failing bone marrow, lung scarring and early death (Armanios and Blackburn, 2012). A in, i in 11 Bya 12 Abantu (et al., 2016). That is a treatment for a rare disease, not for ageing. Be sceptical of any claim that a product or clinic “lengthens your telomeres” to make you younger: in 2015 the head of one company said she had received an unproven telomerase gene therapy abroad, but the claims have never been independently verified in a peer-reviewed study (MIT Technology Review, 2015).

Na:

Urwego: in, Itangira Umuntu

ni. 2006 Shinya Yamanaka ku Eshanu, NONEAHA i Yamanaka Ibintu (OCT4, SOX2, KLF4 na c -, Cyangwa OSKM), A Gikora Akazu Inyuma Umubumbe - nka Intanga Akazu Kuri Icyo ari cyo cyose Akazu Ubwoko: (Na Yamanaka, 2006). i 2012 Nobel Prize ya: (Nobel Prize, 2012). i, i Akazu ‘S Umwaka ni: i ku Kugaruka Kuri A Ishusho. Bya Guhindura Imiterere ni Kuri Hindura i ku, Buri gihe Kuri Gusubiramo i Bya OYA Buri gihe ya: i Akazu Kuri Rusanga.


Inyamaswa 2016, Imbeba Igihe in, Kabiri iminsi ku na iminsi Bidakora. et al., 2016. In 2020, three of the factors (OSK, leaving out the cancer-linked c-MYC) were delivered to the eyes of mice with a glaucoma-like injury and of old mice, and restored their vision by resetting the marks on the DNA of their nerve cells (Lu et al., 2020). - Igihe in Bisanzwe A Leta (et al., 2022), na in Rimwe Gitoya Ubushakashatsi, Kuri Kidasanzwe Umugabo Imbeba i Kigenga (et al., 2024).


. ni i ku in Imbeba, Uturemangingo na (et al., 2013); in Ubushakashatsi, Gikomeje na na Muri A Icyumweru (et al., 2023). i, i na Akira i ni i.

The companies and the first trial. Partial reprogramming has attracted some of the largest investments in biotechnology. Altos Labs launched in January 2022 with $3 billion (Altos Labs, 2022). Retro Biosciences, backed with $180 million by Sam Altman (MIT Technology Review, 2023), works on reprogramming and says its first drug, a pill aimed at cellular recycling, entered a phase 1 trial in 2025 (Retro Biosciences, 2026). NewLimit raised $435 million in 2026 and says it plans a first human trial of a liver therapy (NewLimit, 2026). The first reprogramming therapy to reach people is ER-100 from Life Biosciences, an OSK gene therapy injected into the eye for two diseases of the optic nerve, glaucoma and non-arteritic anterior ischaemic optic neuropathy (NAION). The US Food and Drug Administration cleared the trial in January 2026 (Life Biosciences, 2026), and the first patient was treated in June 2026 in a phase 1 safety study of 18 people (ClinicalTrials.gov NCT07290244; Life Biosciences, 2026). Results will take years. Company announcements are not peer-reviewed evidence, and we will update this page as results are published.

Ikindi

Imbeba

Urwego: in

Since 2004 the Interventions Testing Program has tested 54 compounds in more than 30,000 mice (Jiang et al., 2025). Imiterere ni: i Igerageza Ku, Na: Imbeba, A Igisubizo Hejuru in Byose Bya. acarbose Yongeyeho 22% Kuri Umugabo 5% in Abagore (Harrison et al., 2014); 17- Alpha - estradiol, A Ishusho Bya, Yongeyeho 19% in Abagabo na Ntacyo mu Abagore (et al., 2016); na i Canagliflozin Yongeyeho 14% in Abagabo (Miller et al., 2020). Rapamycin combined with acarbose gave the biggest gains so far: 34 percent in males and 28 percent in females (Strong et al., 2022). ni A By’ ingirakamaro Ikibazo. Bya ya: in Abantu.


na i

Urwego: Cyangwa

ni A Byakoreshejwe ya: Birenzeho. A 2014 Ubushakashatsi Bya Uburayi Ibikubiyemo Yabonetse Abantu Na: diyabete Buri gihe Birenzeho Kugereranya Abantu nta diyabete (et al., 2014), ya: A Umukandida ya: -. TAME (Na:) Kuri Igerageza, Kanseri, na Umubabaro in Kidasanzwe, na Kuri Gushishikariza Kuri Nka A Intego (Barzilai et al., 2016). As of September 2026 we could find no published results. i: A Ubushakashatsi Icyo ari cyo cyose yabonetse kugirango Abakoresha (et al., 2022); metformin OYA Gukuraho Imbeba in i (et al., 2016); na in Kabiri in Kidasanzwe i Bya (Konopka et al., 2019; Walton et al., 2019).

1.

Urwego:

Drugs such as semaglutide mimic a gut hormone, GLP-1, and were developed for diabetes and obesity. In the SELECT trial of 17,604 people with obesity and heart disease, semaglutide cut heart attacks, strokes and cardiovascular deaths by 20 percent (Lincoff et al., 2023). A study of US veterans with diabetes linked GLP-1 drugs to lower risk of many conditions, including dementia, addiction and infections, and higher risk of others, such as digestive problems and pancreatitis (Xie, Choi and Al-Aly, 2025), but such observational studies cannot prove cause. Na in Kabiri Gikomeye in Itangira, OYA ([et al., 2026](https://doi.org/10.1016/S0140-6736(26) 00459- 9)). ya:; ni Kitazwi.

Igabanyangano

Urwego:

Birenzeho Imibereho in, na i Itangira ”-” Byabonetse. In monkeys, the two big long-term studies at first seemed to disagree, but a joint analysis concluded that calorie restriction does improve health and survival when the details of diet and age are taken into account (Mattison et al., 2017). i 2, 218, - Kudafite ibiro bikabije Abafite ibiro bikabije Basabye Kuri 25% Bya Kabiri y’imyaka na Bijyanye na 12%. Their blood pressure, cholesterol and insulin sensitivity improved (Kraus et al., 2019), and one measure of the pace of biological ageing, DunedinPACE, slowed by 2 to 3 percent, though two other clocks did not change (Waziry et al., 2023). na, na ni OYA ya: Abantu Na: Cyangwa Ku Bya, Cyangwa ya:.

Na

Urwego: Cyangwa

When the circulations of an old and a young mouse are joined, some of the old mouse’s tissues, such as muscle and liver, repair themselves better (Conboy et al., 2005). One blood protein, GDF11, was hailed as the rejuvenating factor, but later work could not reproduce the results (Egerman et al., 2015). Some researchers now think that diluting harmful factors in old blood matters more than adding young ones: in old mice, simply replacing half the plasma with a salt and albumin solution improved muscle, liver and brain tissue (Mehdipour et al., 2020). In a small placebo-controlled trial, repeated therapeutic plasma exchange (replacing plasma with a solution of albumin) shifted several epigenetic clocks towards a younger age (Fuentealba et al., 2025), and in a trial in Alzheimer’s disease it slowed decline in daily activities in people with moderate disease (Boada et al., 2020). 2019 i US Na i rusange Bya Plasma Kuva: Abatanga “Ntacyo” na (FDA, 2019).

: Igihe

A OYA a

Igerageza, A Kuri Gupima Itegereza. Amasaha Soma i Ibimenyetso () Ku Bya ku i na Umwaka Kuva: i Ishusho. Itangira, ku, Bya (, 2013; et al., 2013). Later clocks were trained to predict health rather than calendar age: PhenoAge (Levine et al., 2018), GrimAge, which strongly predicts time to death (Lu et al., 2019), and DunedinPACE, which estimates how fast someone is ageing now, like a speedometer (Belsky et al., 2022). Gukoresha Mbere Bya Umwaka ku Impuzandengo (et al., 2016).

OYA: A Inyuma A. A Guhindura… i Ibimenyetso Guhindura… i. Clocks can also be noisy: the same blood sample measured twice has given readings up to nine years apart, although improved versions reduce this (Higgins-Chen et al., 2022). “Igihe” Igerageza na OYA Guyobora.

ni UYUMUNSI in Abantu

Urwego: in Abantu

i hejuru, i ya: Birenzeho imyaka Kuva: na in Gikomeye Imibare Bya Abantu. Bya, i Bya Umwaka ku imyaka, na Bya Cyangwa Ntacyo.

Physical activity. The World Health Organization recommends 150 to 300 minutes of moderate activity, or 75 to 150 minutes of vigorous activity, every week, with muscle-strengthening on two or more days and, for older adults, balance training to prevent falls. Igikorwa ni Kuri Hasi Bya, Ubwoko: 2:, na2020). Ku Icyo ari cyo cyose.


Not smoking. People who stop smoking before about age 40 avoid more than 90 percent of the extra risk of death from continuing (Jha et al., 2013). ku Icyo ari cyo cyose.

Na i, - Igenzura Ibyabaye na, na (2019). Oya, ni i Kuri.


Diet. In the PREDIMED trial, a Mediterranean diet supplemented with olive oil or nuts reduced major cardiovascular events by about 30 percent compared with a reduced-fat diet (Estruch et al., 2018). Oya urwego Bya ni ya:; Birenzeho.

. Kuri Ku Isaha A (et al., 2015); & Rusange - Bya gito Cyangwa ni Kuri umutima na, na ni Na:.

Social connection. In a large meta-analysis, people with stronger social relationships had about 50 percent greater likelihood of survival over the study periods (Holt-Lunstad et al., 2010).

, Ishusho na. ni i Kinini UMWE Umubare w’abantu yahinduwe ku i, 45% Bya ibimenyetso Kuri 14 ([et al., 2024](https://doi.org/10.1016/S0140-6736(24) 01296-0)). i, A Ikiganiro ku 48% Byinshi imyaka hagati Kidasanzwe Ku hejuru Umubare w’abafite ubumuga ([Lin et al., 2023](https://doi.org/10.1016/S0140-6736(23) 01406-X)). A mu Wales Yabonetse ku 20% Bya Birenzeho Byinshi inshuro (et al., 2025).


Guhindura… Ryari: Byahinduwe Together. In North Karelia, Finland, a region-wide programme from 1972 cut smoking, cholesterol and blood pressure, and deaths from coronary heart disease among people aged 35 to 64 fell by 82 percent in men and 84 percent in women by 2012 (Jousilahti et al., 2016; Puska et al., 2016). After Scotland banned smoking in enclosed public places in 2006, hospital admissions for heart attacks and unstable angina fell by 17 percent in a year (Pell et al., 2008). In Finland’s FINGER trial, a two-year programme of diet, exercise, brain training and vascular checks improved thinking and memory in people at risk of dementia (Ngandu et al., 2015), and in Taketoyo, Japan, older people who took part in community salons were about half as likely to develop disability over five years (Hikichi et al., 2015).

Igihe:, OYA na. Gishya Kuri & Ongera Kuri, OYA Gusimbura.

Guhindura>> Umubare w’abaturage

ni Gihinguranya A Guhindukiza Oya Mbere. According to the United Nations, the global fertility rate is now 2.25 births per woman, down from 3.31 in 1990; more than half of all countries and areas have fertility below the replacement level of about 2.1, and nearly one in five below 1.4. Umubare w’abaturage ku isi, 8.2 bilioni mu mwaka wa 2024, ni ku 10.3 bilioni mu gihe cya 2080 na kugabanuka ku 10.2 bilioni mu mwaka wa 2100. 63 ibihugu na Imirenge, ijana ya 28 Bya Umunyabwenge, Umubare w’abaturage i Impera 2070, Abantu 65 na hejuru Kuri Abana munsi 18 (UN Umubare w’abaturage 2024). i Local Solar System Ishuri na Hitamo… ya: buri umuryango, Gushyiraho ku Ipaji ku Ibikorwa.

Kidasanzwe ni Nka A: Birenzeho. The standard measure, the old-age dependency ratio, counts people aged 65 and over for every 100 people aged 20 to 64. Calculated from the UN figures, it was 18 for the world in 2024 and is projected to reach 29 in 2050 and 44 in 2100; in Japan it is already 55 (UN World Population Prospects 2024).

ni OYA a Umubare

That measure assumes that a 65-year-old in 2100 will be as frail as a 65-year-old in 1950. na iyi ni. Umwaka ku i imyaka Abantu Ibumoso: Kuri, OYA i imyaka, na “Kugira” ku iyi Igipimo Nka Impuzandengo: Age: (Na, 2005; Na, 2010). One version sets the threshold of old age where remaining life expectancy falls below 15 years: for French women, that was 58 in 1900 and nearly 75 in 2012 (Sanderson and Scherbov, 2015).

Ijambo- banze: ni Biboneye. Worldwide, life expectancy rose from 66.8 to 73.1 years between 2000 and 2019, while the gap between life expectancy and healthy life expectancy widened from 8.5 to 9.6 years (WHO Global Health Observatory; Garmany and Terzic, 2024). i i in: Abantu NIBA, ya: Ikindi,, na. ni i ku iyi Ipaji: ya:, OYA ya:.

Igishushanyo hejuru ni, OYA A. i na Rimwe Ikibazo: NIBA Abantu imyaka na i Umwaka Ku Guhagarara Akazi na Birenzeho Gushigikira Hejuru Na:, i Ihindurangero? If that line moved from 65 to 70, the world of 2100 would have about 31 older people for every 100 of working age instead of 44; at 75, about 21, close to today’s level. ni Kinini: Bidasanzwe imyaka, Akazi na, na i, OYA i.

,

Nyuma. Across OECD countries, the average age of mothers at their first birth rose from 26.4 in 2000 to 29.6 in 2024 (OECD Family Database). Kugaragaza: Ibimenyetso Ikindi in i (2026), na in i Impera na. ku ni NONEAHA A Inzira Bya: ya: Urugero, i Ku Gisenyi Isuzumwe Hasi - i Gusiba Bya Amagi in Abagore 35 Kuri 45 (NCT05836025); Ibisubizo OYA. Bya, Abantu Nyuma, i Gucaho umurongo Bya A Funga Idirishya.

Itegerejwe Kuri

ni By’ ingirakamaro Kuri Bigyanye i Reba. The Global Burden of Disease forecasters expect 155 of 204 countries and territories to have fertility below replacement by 2050 and 198 by 2100; of 47 countries where fertility has rebounded, only three have returned above replacement (GBD 2021 Fertility and Forecasting Collaborators, 2024). The UN judges that countries with very low fertility whose populations have already peaked are highly unlikely to return to replacement within 30 years (UN World Population Prospects 2024). Some demographers describe a possible low-fertility trap, in which smaller generations, smaller ideal family sizes and economic pressures reinforce each other (Lutz, Skirbekk and Testa, 2006), and economists Dean Spears and Michael Geruso argue that without a change in course, the world’s population could shrink for a long time after its peak (Spears and Geruso, 2025). OYA iyi:, in i & Birenzeho A.

: ni A By’igihe gito

i Local Solar System Reba ni Umubare w’abaturage ni A By’igihe gito Ikosa, A Imishyikirano Kuri A. iyi Nka A, Na: na Na: i Cyangwa.

Isobanuramiterere

1. Birenzeho Bito Bya ngombwa ya: A. A Umubare w’abaturage Cyangwa, Ingano i Umubare Bya Umwaka ku Imibereho Ku, A Shingiro Ikiranga: Bya (, na, 2001). If life expectancy rose from about 73 years to 90, the same population could be sustained with about a fifth fewer births each year.
2. , OYA Umwaka, Gushigikira. i Bya Umwaka ku A imyaka, i Kuri NONEAHA Nka i, Nka i Igishushanyo hejuru.
3. A Idirishya Kureka Abantu i. Byahinduwe, Nyuma OYA Birenzeho.
4. Mbere. i Byabonetse Ibikurikira > in Iterambere Na: (, na, 2009), Akazi na Ubuzima Kuri Gukomatanya (- na, 2014), iyi ni (na, 2014).
5. A Igihe Kuri. A na a iyi Cyumweru, OYA A, ya: Ubumenyi, Akazi na Imiryango Politiki Kuri.

Igerageza. Gushigikira NIBA: Imiterere, i; A Rimwe Bya Umwaka Ku Rimwe, Nka Kuri; Ku Kidasanzwe umuryango Ingano:; na Bya Kidasanzwe - Umwaka ku, ku Bihagaritse Umwaka, Kuguma. NIBA i - Umwaka Igice, NIBA i Itangira Umuntu Bya, na Gusiba, na NIBA Kugira urubyaro Nubwo Ababyeyi Buri gihe,, Gushigikira na Hitamo… i na Ihuzagihe iyi Ipaji: in.

A Na:, - Abantu A Rimwe ku i, ni iyi Ikibazo Na: i Local Solar System ku hagati Abantu na.

:, na

iyi Akazi

• Amashyirahamwe na Raporo Ibisubizo. Nka Kuri Gushigikira, Ku Akazi na Kuri, Gihinguranya. Local Solar System Oya Na: Icyo ari cyo cyose Bya na Bivuye. , Soma Ishyirahamwe ‘S buri mwaka Ibisobanuro: na Konti.

• HelpAge International (Ubwongereza, yashyizweho 288180). Na: Umufatanyabikorwa Imitwe in ibihugu Kizito Abantu Kuri, na, na Hejuru ya:.

• (Ubwongereza, Kwiyandikisha 1128267). Gushigikira Kuri Kidasanzwe Abantu, na, na na ya: Itegeko.

• Ikigo cy’amahirwe (Ubwongereza, yashyizweho 225971). Bya Ubushakashatsi na in i.

• [] (https://www.heart.org/) (, Inyungu - Ntibifitemo uruhare). Igerageza in umutima na Stroke na rusange Porogaramu ku.

• [Alzheimer’ s] (https://www.alzheimers.org.uk/) (Ubwongereza, Kwiyandikisha 296645) na i [Alzheimer’ s] (https://www.alz.org/) (, Inyungu). Gushimangira abantu bafite ubumuga bwo kutavuga n’ababafasha, no gutanga inguzanyo mu bijyanye n’ubushakashatsi ku gukumira, kwita ku barwayi n’ubuvuzi.

Ifashayobora

• Na: ni. A Birenzeho UYUMUNSI, & Ongera na, na Kanda A Kuri Kugenzura…
• Na, na na Kuri i.
• in Umuntu. OYA Kuri ya: A; Kuzana Kuri
• i, OYA i. Kuva: Byashyizweho, in - Ikinyamakuru:, Igiteranyo.
• Bya, na Gusangiza iyi Ipaji: Ryari: Rimwe.
• Keep this page accurate. , na ku i Ifashayobora.

na

• na (2014), Geroscience: linking aging to chronic disease, Cell 159
• na (2013), The hallmarks of aging, Cell 153
• na (2023), Hallmarks of aging: an expanding universe, Cell 186
• na (2013), Substantial health and economic returns from delayed aging may warrant a new focus for medical research, Health Affairs 32
• Scott, Ellison and Sinclair (2021), The economic value of targeting aging, Nature Aging 1
• US National Center for Health Statistics (2026), NHIS Adult Summary Health Statistics, 2025, and the NHIS 2025 sample adult file
• US National Cancer Institute, SEER*Explorer, cancer incidence by age, 2019 to 2023
• na (2022), Estimating the prevalence of dementia and mild cognitive impairment in the US, JAMA Neurology 79
• na (2024), Igihe cyo kubaho - hagati 183 Imiryango y’abafatanyabikorwa, * Gufungura * 7
• ku Igerageza Porogaramu
• Vézina, Kudelski and Sehgal (1975), Rapamycin (AY-22,989), a new antifungal antibiotic, Journal of Antibiotics 28
• na (2009), Rapamycin fed late in life extends lifespan in genetically heterogeneous mice, Nature 460
• na (2011), , OYA Cyangwa, Imibereho Bya, * Bya A * 66
• na (2014), - Iyongera in ni Na, * Akazu * 13
• na (2014), Umumaro in i, * * 6
• na (2018), TORC1 inhibition enhances immune function and reduces infections in the elderly, Science Translational Medicine 10
• na (2021), i Bya Na: Kuri Ihinduranya Igikorwa in Kidasanzwe Abafite: Icyiciro 2b na Icyiciro 3, * * 2
• na (2025), Influence of rapamycin on safety and healthspan metrics after one year: PEARL trial results, Aging 17
• Lee, Kuerec and Maier (2024), Targeting ageing with rapamycin and its derivatives in humans: a systematic review, Lancet Healthy Longevity 5
• na (2012), Rapamycin-induced insulin resistance is mediated by mTORC2 loss and uncoupled from longevity, Science 335
• Bya, : Ibisobanuro
• na (2008), Senescence-associated secretory phenotypes reveal cell-nonautonomous functions of oncogenic RAS and the p53 tumor suppressor, PLOS Biology 6
• na (2011), Clearance of p16Ink4a-positive senescent cells delays ageing-associated disorders, Nature 479
• na (2016), Naturally occurring p16Ink4a-positive cells shorten healthy lifespan, Nature 530
• na (2015), Bya: Kuva: Kuri, * Akazu * 14
• na (2018), Senolytics improve physical function and increase lifespan in old age, Nature Medicine 24
• na (2018), Fisetin is a senotherapeutic that extends health and lifespan, EBioMedicine 36
• na (2019), in: Ibisubizo Kuva: A Itangira - in - Umuntu, Gufungura - Akarango, Ubushakashatsi, * * 40
• na (2019), Senolytics decrease senescent cells in humans, EBioMedicine 47
• na (2024), Bya ku in Abagore: A Icyiciro 2, * * 30
• na (2023), Senolytic therapy in mild Alzheimer’s disease: a phase 1 feasibility trial, Nature Medicine 29
• (2025), Icyiciro 2B Umurongo hejuru Ibisubizo na Impamyabushobozi: Bya, Na
• na (2016), Igihe kirekire Bya Umwaka - in Imbeba, * * 24
• na (2016), NAD+ repletion improves mitochondrial and stem cell function and enhances life span in mice, Science 352
• na (2021), 17-a-estradiol late in life extends lifespan in aging UM-HET3 male mice; nicotinamide riboside and three other drugs do not affect lifespan in either sex, Aging Cell 20
• na (2018), nicotinamide riboside ni - na + in hagati - Age: na Kidasanzwe Abantu, * 9
• na (2021), Ikinya inzoka intangarugero in abagore, * * 372
• na (2022), The NADPARK study: a randomized phase I trial of nicotinamide riboside supplementation in Parkinson’s disease, Cell Metabolism 34
• na (2025), Bya ku na ya: A, * in Na * 65
• na (2025), Bya na ku Na Umumaro, * Bya, na * 16
• Na (2025), Kuri Umuturage Inyandikomvugo ku NMN, Docket FDA-2023-P-0872
• na (2003), Small molecule activators of sirtuins extend Saccharomyces cerevisiae lifespan, Nature 425
• na (2006), Resveratrol improves health and survival of mice on a high-calorie diet, Nature 444
• na (2008), Umwaka - Na Bya Imiterere, * * 8
• na (2005), Substrate-specific activation of sirtuins by resveratrol, Journal of Biological Chemistry 280
• na (2010), SRT1720, SRT2183, SRT1460, and resveratrol are not direct activators of SIRT1, Journal of Biological Chemistry 285
• na (2011), Absence of effects of Sir2 overexpression on lifespan in C. elegans and Drosophila, Nature 477
• na (2008), Ikiganiro, Na
• na (2012), The sirtuin SIRT6 regulates lifespan in male mice, Nature 483
• na (2021), Restoration of energy homeostasis by SIRT6 extends healthy lifespan, Nature Communications 12
• in Cyangwa 2009 na 2012
• na (2012), in Kigenga na Kidasanzwe Imbeba Na, * EMBO * 4
• na (1994), Specific association of human telomerase activity with immortal cells and cancer, Science 266
• & mendelian;, na AL. (2017), hagati Uburebure na Bya Na -, * JAMA * 3
• Armanios and Blackburn (2012), The telomere syndromes, Nature Reviews Genetics 13
• na (2016), Kuvura ya: Telomeres, * NEJM * 374
• Takahashi and Yamanaka (2006), Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors, Cell 126
• na (2016), In vivo amelioration of age-associated hallmarks by partial reprogramming, Cell 167
• na (2020), Reprogramming to recover youthful epigenetic information and restore vision, Nature 588
• na (2022), Igihe - Amahinduka in, * * 2
• na (2024), Gene therapy-mediated partial reprogramming extends lifespan and reverses age-related changes in aged mice, Cellular Reprogramming 26
• na (2013), Reprogramming in vivo produces teratomas and iPS cells with totipotency features, Nature 502
• na (2023), Kuri, * * 3
• (2026), Bya kugirango - 100 na Itangira; Icyegeranyo NCT07290244
• Company announcements: Altos Labs (2022), Retro Biosciences (2026), NewLimit (2026); and MIT Technology Review (2023) on Retro Biosciences
• na (2025), Isuzuma ry’ i, * Bya A * 80
• na (2014), Acarbose, 17-α-estradiol, and nordihydroguaiaretic acid extend mouse lifespan preferentially in males, Aging Cell 13
• na (2016), Longer lifespan in male mice treated with a weakly estrogenic agonist, an antioxidant, an α-glucosidase inhibitor or a Nrf2-inducer, Aging Cell 15
• na (2008), na Bya Umugabo Imbeba, * * 7
• na (2019), Bya Umugabo Na, * Akazu * 18
• na (2020), Imibereho in Umugabo OYA umugore Imbeba, * JCI * 5
• na (2022), ya: i Ivanga Bya na ya: in, * * 21
• na (2014), Abantu Na: Ubwoko 2 Igihe kirekire?, *, na * 16
• na (2016), Metformin as a tool to target aging, Cell Metabolism 23
• na (2022), i Bya A in Ubwoko: 2 Na: Na:, * Ikinyamakuru Bya * 51
• na (2019), Kuri in, * Akazu * 18
• na (2019), in Kuri Impinduka Imyitozo ngororamubiri mu Kidasanzwe Abafite ubumuga (), * * 18
• na (2023), Na in (), * * 389
• Xie, Choi and Al-Aly (2025), Mapping the effectiveness and risks of GLP-1 receptor agonists, Nature Medicine 31
• na (2026), [in Itangira (Na +)](https://doi.org/10.1016/S0140-6736(26) 00459-9), * The Lancet * 407
• na (2017), na Bya, * * 8
• na (2019), [2 imyaka Bya na ()](https://doi.org/10.1016/S2213-8587(19) 30151-2), * & Endocrinologije * 7
• na (2023), Bya - ku Bya, * * 3
• na (2005), Rejuvenation of aged progenitor cells by exposure to a young systemic environment, Nature 433
• na (2020), Bya ku Kidasanzwe Na: -, * * 12
• na (2015), GDF11 increases with age and inhibits skeletal muscle regeneration, Cell Metabolism 22
• na (2025), - Kuri Umwaka in Kuri, * Akazu * 24
• na (2020), A randomized, controlled clinical trial of plasma exchange with albumin replacement for Alzheimer’s disease (AMBAR), Alzheimer’s & Dementia 16
• na (2019), Itangazo ry’abacuruzi rivuga ko bakwiye gusuzuma
• (2013), Ubwoko Bya Na, * * 14
• na (2013), Genome-wide methylation profiles reveal quantitative views of human aging rates, Molecular Cell 49
• na (2018), Bya ya: Na (), * * 10
• na (2019), IMISUSIRE Na, * * 11
• na (2022), , A Bya i Bya, * eLife * 11
• na (2016), - Bya: - Igihe Kuri, * * 8
• na (2022), A ya: Bya, * * 2
• World Health Organization (2020), Guidelines on physical activity and sedentary behaviour
• na (2013), 21st-century hazards of smoking and benefits of cessation in the United States, NEJM 368
• SPRINT MIND Investigators (2019), Effect of intensive vs standard blood pressure control on probable dementia, JAMA 321
• na (2018), Bya Na: A Indyo, * NEJM * 378
• na (2015), Recommended amount of sleep for a healthy adult, Sleep 38
• na (2010), Imibanire n’ihungabana ry’urupfu, PLOS 7
• na (2024), Gukumira, Gukora, na: 2024 Raporo Bya i, * The Lancet * 404
• na (2023), Ikibazo cy’ubuzima Igenzura Kuri Kugabanya (), * * 402
• na (2025), A ku i Bya ku, *
• na (2022), Imirongo na Byose - Ibimenyetso: A Meta- Bya 15 International, * * 7
• na (2016), 40 - umwaka na i Bya in: i, * * 11
• na (2016), ,,, na Bya i, * * 11
• na (2010), - - umwaka in in Finland, * Ikinyamakuru Bya * 39
• na (2008), Smoke-free legislation and hospitalizations for acute coronary syndrome, NEJM 359
• na (2015), [A 2 umwaka Kuri in Ku - Umubare w’abafite ubumuga Abana ()](https://doi.org/10.1016/S0140-6736(15) 60461-5), * * 385
• na (2015), Bya A Ibikorwa by’Imiryango Porogaramu ku Bikora Ubumuga Gukumira ya: i Ubushakashatsi, * Bya na * 69
• United Nations, Department of Economic and Social Affairs, Population Division (2024), World Population Prospects 2024: Summary of Results and data files
• Sanderson and Scherbov (2005), Average remaining lifetimes can increase as human populations age, Nature 435
• Sanderson and Scherbov (2010), Remeasuring aging, Science 329
• Sanderson and Scherbov (2015), Faster increases in human life expectancy could lead to slower population aging, PLOS ONE 10
• Ishami ry’ubuzima ku isi & Ubuzima Itegerejwe: na
• Ububikoshingiro, Bya ku Na Umwaka -
• (2026), : i Nka A Bya Umugore Na, * * 24
• ClinicalTrials.gov NCT05836025
• 2021 na (2024), [in 204 ibihugu na Imirenge, 1950 Kuri 2021, Na: Igihe- ngombwa Kuri 2100](https://doi.org/10.1016/S0140-6736(24) 00550- 6), * The Lancet * 403
• Lutz, Skirbekk and Testa (2006), The low-fertility trap hypothesis, Vienna Yearbook of Population Research
• Spears and Geruso (2025), After the Spike: Population, Progress, and the Case for People, Simon & Schuster
• , na (2001), *: Na *,
• Myrskylä, Kohler and Billari (2009), Advances in development reverse fertility declines, Nature 460
• na (2014), Iterambere ry’ubukungu ‘ibimenyetso’ a - Kugabanya in?, * Bya Ijanisha * 30
• Harttgen and Vollmer (2014), A reversal in the relationship of human development with fertility?, Demography 51
• MIT Technology Review (2015), 2015 in biomedicine
• Bivuye i ya: na na - Imimerere Kuva: MukusanyaKDE