A claim you hear on longevity podcasts

Does rapamycin extend lifespan in mice?

The claim checked: Low-dose rapamycin makes mice live longer, even started at 20 months Hear it at 23:23

What do the studies say?

Not enough evidence

All ten studies are in mice, so none count toward the badge. Six found rapamycin lengthened life, including from 20 months; four found smaller or one-sex gains, or more gain from an earlier start.

None of these studies counts toward the badge yet. This point is about animals. Only human studies count toward a badge. 4 more studies are waiting for a full read and do not count yet.

What was said on the podcast?

“you can take low doses as a human, or give it in low doses to a mouse. Those mice live dramatically longer, even if you give them rapamycin when they're 20 months of age, which is a really old mouse, that'd be like a 75-year-old human, they still live longer.”
David Sinclair, Lifespan · The Science Behind Why We Age | Lifespan with Dr. David Sinclair #1 · 23:23 on YouTube
Comes up in 10 episodes of the show.
The point checked Not enough evidence

Low-dose rapamycin extends mouse lifespan, even when started at 20 months

Agree 6

other primary study · 2016 · landmark

Not counted. An animal or lab study.

“Taken together, our data demonstrate that a single three-month regimen of rapamycin is sufficient to robustly increase life expectancy in middle-aged mice, comparable to the effects previously reported for life-long treatment, while also improving measures of healthspan and substantially altering the microbiome.”

Transient rapamycin treatment can increase lifespan and healthspan in middle-aged mice. Elife
Who: C57BL/6JNia mice aged 19-21 months from the NIA aged rodent colony
PMID 27549339

other primary study · 2009 · cited on tape

Not counted. An animal or lab study.

“Rapamycin initiated at 600 days of age thus leads to a significant increase in maximal lifespan.”

Rapamycin fed late in life extends lifespan in genetically heterogeneous mice. Nature
Who: genetically heterogeneous UM-HET3-type mice (CB6F1 x C3D2F1), male and female, at three NIA ITP sites; a second cohort started at 270 days
PMID 19587680

other primary study · 2020

Not counted. An animal or lab study.

“Continuous treatment with 42‐ppm eRapa starting at 20 months of age increased median and 90th percentile lifespan in both males and females.”

Rapamycin-mediated mouse lifespan extension: Late-life dosage regimes with sex-specific effects. Aging Cell
Who: genetically heterogeneous UM-HET3 mice at three sites, treatment starting at 20 months
PMID 33145977

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trial or observed group · 2011 · landmark

Not counted. An animal or lab study.

“They provide a fully independent replication to show that rapamycin can extend mouse life span in males and females, and they show that the effect does not depend on the age at which drug exposure is begun, at least between 9 and 20 months of age.”

Rapamycin, but not resveratrol or simvastatin, extends life span of genetically heterogeneous mice. J Gerontol A Biol Sci Med Sci
Who: genetically heterogeneous UM-HET3 mice, male and female, at three test sites (TJL, UM, UT)
PMID 20974732

other primary study · 2012 · landmark

Not counted. An animal or lab study.

“Rapamycin started at 20 months of age produces equivalent lifespan extension, in UM-HET3 mice, as it does when started at 9 months of age, and it may prove that the optimal ratio of benefit to harmful side effects will involve starting the drug in mice older than 9 months or may require an intermittent schedule in which months without drug exposure are alternated with months in which rapamycin is provided.”

Rapamycin slows aging in mice. Aging Cell
Who: genetically heterogeneous UM-HET3 mice, both sexes
PMID 22587563

pooled analysis · 2025

Not counted. An animal or lab study.

“Overall, this study suggests that rapamycin and DR confer comparable lifespan extension across a broad range of vertebrates.”

Rapamycin, Not Metformin, Mirrors Dietary Restriction-Driven Lifespan Extension in Vertebrates: A Meta-Analysis. Aging Cell
Who: vertebrates (mostly mice, also rats, monkeys, dogs, fish) in lifespan studies
PMID 40532901

Partly agree 4

other primary study · 2014 · landmark

Not counted. An animal or lab study.

“Rapamycin at 4.7 ppm was not effective in increasing male lifespan in the pooled data set, although it did lead to significant lifespan extension (16%, P = 0.02) at UM.”

Rapamycin-mediated lifespan increase in mice is dose and sex dependent and metabolically distinct from dietary restriction. Aging Cell
Who: Genetically heterogeneous UM-HET3 mice at three US sites (TJL, UM, UT), treatment started at 9 months of age
PMID 24341993

other primary study · 2010

Not counted. An animal or lab study.

“Rapamycin treatment increased mean (+4.1%) and maximal lifespan (+12.4%; Table 2).”

Rapamycin extends maximal lifespan in cancer-prone mice. Am J Pathol
Who: 58 female FVB/N HER-2/neu transgenic cancer-prone mice, treatment started at 2 months of age
PMID 20363920

other primary study · 2012

Not counted. An animal or lab study.

“Thus, the life-extending effect of rapamycin is more pronounced when treatment starts earlier in life.”

Rapamycin extends lifespan and delays tumorigenesis in heterozygous p53+/- mice. Aging (Albany NY)
Who: Heterozygous p53+/- male mice on a C57Bl/6 background (cancer-prone model), not normal aged mice
PMID 23123616

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other primary study · 2014

Not counted. An animal or lab study.

“The lifespan of female mice increased only 6%, and Rapa had no significant effect on the lifespan of male mice.”

Mice fed rapamycin have an increase in lifespan associated with major changes in the liver transcriptome. PLoS One
Who: C57BL/6 male and female mice
PMID 24409289

Disagree 0

None.

What else was said but not tested?

  • Rapamycin also extends lifespan in yeast, flies and worms
  • Low mTOR activity gives the longest lifespan
  • mTOR inhibition works the same way across species (co-host's phrase, hedged by Sinclair)

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