Taking a weekly 6 mg dose of rapamycin might actually slow down strength gains in older people who are working out, even though both those on and off the drug get a bit stronger.

Pro

Against

Evidence from Studies

Supporting (0)

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No supporting evidence found

Contradicting (2)

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Exercise and Weekly Sirolimus (Rapamycin) in Older Adults: RAPA‐EX‐01 Randomised, Double‐Blind, Placebo‐Controlled Trial

Randomized Controlled Trial

Human

2026 Apr

A single-center, double-blind, randomized, placebo-controlled, two-arm study to evaluate the safety and efficacy of once-weekly sirolimus (rapamycin) on muscle strength and endurance in older adults following a 13-week exercise program

Randomized Controlled Trial

Human

2024 Oct 1

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Similar Assertions

Taking a lot of rapamycin each week might make it harder for older people to build muscle from exercise, but a smaller dose could be better for strength and body health.

87%

Taking rapamycin with exercise might help improve muscle strength in older people by affecting a specific cell pathway in the body.

83%

Taking a low weekly dose of a drug called rapamycin for a year might help older women build more lean muscle, which could slow down muscle loss as they age.

74%

Taking a weekly low dose of a drug called rapamycin while doing a 13-week home exercise program might help older adults (65–85 years old) get stronger legs — but we’re not totally sure how much it helps because the study was small and short.

74%

In older adults who don't move much, taking a weekly rapamycin pill might slightly weaken the benefits of a 13-week home exercise program on leg strength and mobility, according to some detailed number crunching—even though the main results weren't clear-cut.

73%