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Compound Deep-Dive

Tier 2: Grey AreaA promising longevity supplement for autophagy induction, but expensive and lacks dramatic short-term effects.

Spermidine

N-(3-aminopropyl)butane-1,4-diamineWheat germ extract

Promising for long-term cellular health

Hype Risk

7/10

Noticeability

3/10

Evidence Tier

Emerging

Cost / Month

~$38

Longevity play

What it's actually good for

Longevity

Research Supported

Strong mechanistic evidence for autophagy and observational links to lifespan.

Focus

Mixed Evidence

Some evidence for memory performance in older adults with cognitive decline.

Muscle

Weak Evidence

Limited evidence suggests it may help prevent age-related muscle loss in animals.

Energy: neutralSleep: neutralRecovery: neutralMood: neutralImmunity: neutral

How it works

Spermidine is a polyamine that triggers autophagy, the body's cellular recycling process. Human evidence suggests potential benefits for cognitive health and hair growth, though long-term longevity data in humans is currently limited to observational studies.

Induces autophagy by inhibiting the EP300 acetyltransferase, mimicking the cellular effects of caloric restriction.

Safety

  • Contains gluten if derived from wheat germ
  • Generally well-tolerated in human trials up to 6mg/day
  • Safety during pregnancy is not established

The full StackRoast report adds

  • The exact dose, timing, and effective range to actually run it at
  • Where people go wrong with it — the dose-creep and timing traps
  • What Spermidine clashes with or duplicates in your stack
Roast My Stack →

Community Reality Check

Distilled from 450 threads
Confidence: medium

What users report

  • Hair thickness
  • Nail growth
  • Cognitive clarity

The catch

  • Expensive
  • No perceptible change
  • Wheat allergy concerns

Side effects reported

  • Bloating
  • Mild nausea
https://www.reddit.com/r/longevityhttps://www.reddit.com/r/Biohackershttps://www.reddit.com/r/Supplements

The Receipts

8 sources— studies, videos & links

Videos

Spermidine: The Science of Autophagy & Longevity

Thomas DeLauer

Explains the mechanism of autophagy and how spermidine mimics fasting.

Spermidine: The Best Longevity Supplement?

Dr. Brad Stanfield

A critical look at the human evidence for spermidine and whether it's worth the cost.

Papers

Creators

Dr. Brad Stanfield

YouTube

Medical doctor focused on longevity science and supplement evidence.

Thomas DeLauer

YouTube

Health and fitness educator with a focus on metabolic health and fasting mimetics.

Clinical Sources

Taking Spermidine in a stack? Find out if the combination actually makes sense.

Roast My Stack →