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Rapamycin (Longevity Context) supplement
Pharmaceutical / mTOR Inhibitor

Rapamycin (Longevity Context): Benefits, Dosage, Forms & Research

Pharmaceutical / mTOR Inhibitor

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

TL;DR — Quick Answer

Rapamycin is the only drug proven to extend maximum lifespan in every species tested. The NIA's ITP showed 9-14% lifespan extension in mice. It works by inhibiting mTOR, the master growth/aging switch. This is a prescription immunosuppressant — off-label longevity use requires medical supervision.

Key Facts

What it is
An mTOR inhibitor and the only drug proven to extend maximum lifespan across all tested species
Primary benefits
  • Only drug to extend maximum lifespan in every organism tested
  • Inhibits mTORC1 (master aging pathway)
  • 9-14% lifespan extension in mice (ITP study)
  • Enhances autophagy and immune function at low doses
  • Mimics caloric restriction at the molecular level
Typical dosage
1-6mg weekly (off-label longevity protocols; prescription required)
Evidence level
Emerging
Safety profile
Professional Guidance Recommended

What the Research Says

Rapamycin is arguably the most validated longevity drug in existence. Harrison et al. (2009) published the landmark ITP study showing lifespan extension in mice even at late-life initiation. Mannick et al. (2014) made the counterintuitive discovery that low-dose mTOR inhibition enhanced immune function in the elderly — a finding that reshaped thinking about rapamycin's risk profile. Blagosklonny has published extensively on the theoretical framework for rapamycin as an anti-aging drug, arguing that aging is driven by mTOR hyperfunction. Matt Kaeberlein's Dog Aging Project is testing rapamycin in companion dogs as a stepping stone to human longevity trials. The key innovation in longevity use is intermittent (weekly) rather than daily dosing, which appears to preserve immune function while still providing mTOR inhibition benefits. This is a potent pharmaceutical requiring expert medical supervision.

Benefits of Rapamycin (Longevity Context)

  • Lifespan extension — the NIA Interventions Testing Program (Harrison et al., 2009) demonstrated rapamycin extended median and maximum lifespan in genetically heterogeneous mice by 9-14%, even when started at 20 months of age (equivalent to ~60 human years)
  • mTOR inhibition — rapamycin directly inhibits mTOR complex 1 (mTORC1), the central nutrient-sensing kinase that accelerates aging when chronically activated; mTOR inhibition promotes autophagy, reduces senescence, and shifts cells from growth to maintenance mode
  • Immune rejuvenation — paradoxically, low-dose rapamycin may enhance rather than suppress immune function in the elderly; Mannick et al. (2014) showed low-dose mTOR inhibition improved influenza vaccine response by 20% in elderly subjects
  • Cardiac protection — Flynn et al. (2013) showed rapamycin reversed age-related cardiac dysfunction and reduced cardiac inflammation in aged mice
  • Cancer prevention — mTOR hyperactivation drives many cancers; rapamycin and its analogues (rapalogs) are approved cancer treatments and may reduce age-related cancer incidence at low doses
Did you know?

Rapamycin is arguably the most validated longevity drug in existence.

Forms of Rapamycin (Longevity Context)

FormBioavailabilityBest For
Rapamycin / Sirolimus Tablets (prescription)Moderate (~15%)The only available form — oral tablets in 0.5mg, 1mg, and 2mg strengths; requires prescription and monitoring

Dosage Recommendations

General recommendation: 1-6mg once weekly (off-label longevity dose; prescription required)

Timing: Once weekly dosing (not daily) is used in longevity protocols to allow mTOR reactivation between doses, minimizing immunosuppressive effects

Dosage by Condition

ConditionRecommended DoseEvidence
Longevity / anti-aging (off-label)3-6mg once weeklyEmerging
Immune rejuvenation0.5-1mg once weeklyEmerging
Organ transplant (approved use)2-5mg daily (continuous)Strong

Upper limit: 6mg/week for longevity protocols (daily dosing at transplant doses causes immunosuppression)

Side Effects and Safety

Safety profile: Professional Guidance Recommended

Potential Side Effects

  • Immunosuppression — the primary concern; daily dosing suppresses immunity, but weekly low-dose protocols aim to minimize this
  • Mouth sores (aphthous ulcers) — the most common side effect at longevity doses; often dose-limiting
  • Impaired glucose tolerance and insulin resistance at higher/continuous doses
  • Delayed wound healing
  • Lipid elevation (increased LDL and triglycerides)
  • Potential fertility effects — reversible in animal models but relevant concern

Drug & Supplement Interactions

  • CYP3A4 inhibitors (ketoconazole, grapefruit, clarithromycin) — dramatically increase rapamycin blood levels; potentially dangerous
  • CYP3A4 inducers (rifampin, St. John's Wort) — reduce rapamycin levels
  • Live vaccines — contraindicated due to immunosuppressive effects
  • Other immunosuppressants — additive immune suppression
  • Metformin — commonly combined in longevity protocols; potential additive glucose effects
Check Rapamycin (Longevity Context) interactions with other supplements →
BenefitsDosage GuideSide EffectsTypes & FormsResearchFAQ

Related Conditions

Longevity & Healthy Aging

Related Supplements

Metformin (Longevity Context)SpermidineNMN

Frequently Asked Questions

Is rapamycin safe for longevity use?

Rapamycin has a well-characterized side effect profile from decades of transplant medicine use, but longevity protocols use much lower, intermittent doses. Weekly dosing of 3-6mg appears to minimize immunosuppression while retaining mTOR inhibition benefits. However, long-term safety data for off-label longevity use is limited. This must be used under expert medical supervision with regular blood monitoring for lipids, glucose, and immune function.

How is longevity dosing different from transplant dosing?

Transplant patients take rapamycin daily at 2-5mg to continuously suppress immune function and prevent organ rejection. Longevity protocols use intermittent dosing — typically 3-6mg once weekly — which allows mTOR to reactivate between doses. This pulsed approach appears to provide anti-aging benefits (autophagy, reduced senescence) while minimizing immunosuppression. Mannick et al. showed this intermittent approach actually enhanced immune function.

Can I buy rapamycin as a supplement?

No. Rapamycin (sirolimus) is a prescription medication that requires a doctor's prescription. It is not available as an over-the-counter supplement. Some longevity-focused physicians prescribe it off-label based on the research, but it requires regular blood monitoring. Never attempt to self-source or self-medicate with rapamycin — the drug interactions and side effects require professional management.

References

  1. (). Rapamycin fed late in life extends lifespan in genetically heterogeneous mice. Nature. DOI
  2. (). mTOR inhibition improves immune function in the elderly. Science Translational Medicine. DOI
  3. (). Rapamycin for longevity: opinion article. Aging. DOI