Pterostilbene vs Spermidine
Head-to-head comparison of Pterostilbene (trans-3,5-Dimethoxy-4'-hydroxystilbene) and Spermidine (Spermidine) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Pterostilbene | Spermidine |
|---|---|---|
| Category | Anti-Aging | Anti-Aging |
| Full Name | trans-3,5-Dimethoxy-4'-hydroxystilbene | Spermidine |
| Molecular Weight | 256.31 Da | 145.25 Da |
| Half-Life | 2-4 hours | N/A |
| Amino Acids | N/A | N/A |
| Typical Dose | 50-150 mg/day | 1-6 mg/day |
| Route | Oral | Oral |
| Purity | ≥98% | ≥98% |
| Studies Count | 95 | 250 |
| Research Status | Clinical | Clinical |
Pterostilbene Benefits
- ✓better bioavailability than resveratrol
- ✓antioxidant/anti-inflammatory
- ✓supports metabolic health
- ✓may support cognitive aging
Spermidine Benefits
- ✓autophagy induction
- ✓mitochondrial quality control
- ✓cardiometabolic support
- ✓healthspan association
Pterostilbene Dosing
50-150 mg/day orally|once daily with food|multi-week study periods
Spermidine Dosing
1-6 mg/day oral|daily supplementation protocols|dietary intake from food sources
Pterostilbene Side Effects
- ⚠GI upset
- ⚠increased LDL in some studies
- ⚠headache
Spermidine Side Effects
- ⚠GI upset
- ⚠bloating
- ⚠nausea
- ⚠odor changes
Research Overview
Pterostilbene
Pterostilbene has supportive preclinical data and smaller human studies across metabolic and oxidative stress endpoints. Its anti-aging potential is plausible, but it is less established than resveratrol or NR.
Spermidine
Spermidine has meaningful preclinical support and a growing human observational literature linking intake with healthier aging metrics. Its core longevity mechanism is thought to involve autophagy and improved proteostasis.
Ready to buy?
Find both peptides from our verified, lab-tested vendors with purity certificates and third-party testing.