Head to head
Glycine vs Magnesium
On the strength of human evidence, Magnesium comes out ahead (evidence 50 vs 48). 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
Moderatethe sleep trend ahead of its evidence
Marketing intensity 70 of 100. Evidence strength 50 of 100. Verdict: Slightly overhyped.
Genuinely useful for deficiency and constipation. The 'magnesium fixes your sleep and anxiety' wave runs ahead of the science.
Full evidence on Magnesium →Side by side
| Metric | Glycine | Magnesium |
|---|---|---|
| Overall tier | Limited | Moderate |
| Evidence score | 48/100 | 50/100 |
| Hype score | 42/100 | 70/100 |
| Verdict | Hype ≈ evidence | Slightly overhyped |
| Safety concern | low | low |
Quick answers
Glycine or Magnesium — which has better evidence?
On the strength of human evidence, Magnesium comes out ahead (evidence 50 vs 48). But they're often used for different things — read each claim before deciding.
Can you take Glycine and Magnesium 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.