Head to head
Magnesium L-threonate vs Spermidine
On the strength of human evidence, Magnesium L-threonate comes out ahead (evidence 35 vs 25). But they're often used for different things — read each claim before deciding.
Magnesium L-threonate
▲ Trendingthe 'brain magnesium' with thin, industry-funded data
Marketing intensity 80 of 100. Evidence strength 35 of 100. Verdict: Severely overhyped.
Marketed as the magnesium that reaches your brain. The human evidence is one or two small, industry-funded trials - promising, nowhere near proven, and priced at a steep premium.
Full evidence on Magnesium L-threonate →Spermidine
▲ Trendingthe autophagy-longevity bet, early in humans
Marketing intensity 72 of 100. Evidence strength 25 of 100. Verdict: Severely overhyped.
A compelling longevity mechanism (it triggers autophagy) with encouraging animal data - but the human cognition trials are small and mixed, not the proven memory aid it's sold as.
Full evidence on Spermidine →Side by side
| Metric | Magnesium L-threonate | Spermidine |
|---|---|---|
| Overall tier | Limited | Weak |
| Evidence score | 35/100 | 25/100 |
| Hype score | 80/100 | 72/100 |
| Verdict | Severely overhyped | Severely overhyped |
| Safety concern | low | low |
Quick answers
Magnesium L-threonate or Spermidine — which has better evidence?
On the strength of human evidence, Magnesium L-threonate comes out ahead (evidence 35 vs 25). But they're often used for different things — read each claim before deciding.
Can you take Magnesium L-threonate and Spermidine together?
This page compares the evidence, not interactions. Some supplements interact with each other or with medications — check each one's safety section and talk to a pharmacist before stacking.