Sirolimus stays in your body for a long time—about 2.5 days—so even if you take it just once a week, it might still be active when you work out again.
Evidence from Studies
Supporting (2)
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Exercise and Weekly Sirolimus (Rapamycin) in Older Adults: RAPA‐EX‐01 Randomised, Double‐Blind, Placebo‐Controlled Trial
The study gives rapamycin once a week and sees effects throughout the week, which makes sense if the drug stays in the body for a long time—like the claim says.
The study looked at how long rapamycin stays in the body when taken once a week and found it takes about 69 hours to drop by half, which is close to the 62 hours mentioned in the claim. This means the drug sticks around long enough to overlap with the next dose, supporting the idea of lasting effects.
Contradicting (1)
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Short sirolimus half‐life in pediatric renal transplant recipients on a calcineurin inhibitor‐free protocol
The study looked at kids taking rapamycin twice a day after kidney transplants and found the drug doesn’t stay in their bodies nearly as long as the claim says. This contradicts the idea that it lasts long enough to build up with weekly use.
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.