Head to head
Glycine vs Magnesium L-threonate
On the strength of human evidence, Glycine comes out ahead (evidence 48 vs 35). But they're often used for different things — read each claim before deciding.
Glycine
Limitedthe quiet, cheap sleep amino acid
Marketing intensity 42 of 100. Evidence strength 48 of 100. Verdict: Hype ≈ evidence.
Under-marketed and reasonably promising for sleep. The longevity buzz, though, is built almost entirely on worms and mice.
Full evidence on Glycine →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 →Side by side
| Metric | Glycine | Magnesium L-threonate |
|---|---|---|
| Overall tier | Limited | Limited |
| Evidence score | 48/100 | 35/100 |
| Hype score | 42/100 | 80/100 |
| Verdict | Hype ≈ evidence | Severely overhyped |
| Safety concern | low | low |
Quick answers
Glycine or Magnesium L-threonate — which has better evidence?
On the strength of human evidence, Glycine comes out ahead (evidence 48 vs 35). But they're often used for different things — read each claim before deciding.
Can you take Glycine and Magnesium L-threonate 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.