Spermidine vs Melanotan II
Side-by-side comparison of key properties, dosing, and research.
Anti-Aging & LongevityCognitive Enhancement
SpermidineSexual Health & Libido
Melanotan II- Summary
- Spermidine is a naturally occurring polyamine found in all living cells, with exceptionally high concentrations in wheat germ, aged cheese, and human sperm. It is the most studied autophagy-inducing dietary compound, shown to extend lifespan across multiple species and reduce cardiovascular and cognitive aging.
- Melanotan II is a synthetic analog of alpha-melanocyte-stimulating hormone (α-MSH) that stimulates melanin production (skin tanning), suppresses appetite, and enhances sexual function. It is not FDA-approved and has significant safety concerns including mole changes and cardiovascular effects.
- Half-Life
- ~30–60 minutes, but gut bacteria produce it continuously; supplementation raises tissue levels over weeks
- 1–2 hours
- Admin Route
- Oral
- SubQ
- Research
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- Typical Dose
- 1–5 mg
- 0.25–0.5 mg
- Frequency
- Once daily
- Once daily
- Key Benefits
- Induces autophagy — cellular self-cleaning
- Extends lifespan in yeast, flies, worms, and mice
- Reduces cardiovascular aging and arterial stiffness
- Reduces all-cause mortality (human epidemiological data)
- Neuroprotective: reduces amyloid and tau pathology
- Promotes hair growth (anagen phase activation)
- Reduces age-related immune decline
- Improves memory in aging models
- Promotes skin tanning and melanin production
- Reduces UV exposure needed to tan
- Enhances libido and sexual function
- May suppress appetite
- Faster, deeper tan development
- Longer-lasting tan maintenance
- Potential photoprotective effects
- Side Effects
- Generally very well tolerated
- Rare: mild GI discomfort at high doses
- May temporarily reduce some gut bacteria species
- Rare: headache at initiation
- Nausea (very common, especially in first days)
- Facial flushing
- Spontaneous erections in men
- Darkening or changes in existing moles (monitor closely)
- +3 more
- Stacks With
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