Not medical advice

Supplement Hype reports the state of evidence and grades claims. It is not a substitute for a doctor or pharmacist and does not diagnose, treat, or cure anything. Read the full disclaimer →

Head to head

L-theanine vs Magnesium glycinate

Both score the same on overall evidence (50/100). The right pick depends on the specific claim and your goal — read them claim by claim.

Shared goals: Mood & stress · Sleep

L-theanine

Moderate

the calm half of your coffee

Marketed
Evidence
Slightly overhyped

Marketing intensity 68 of 100. Evidence strength 50 of 100. Verdict: Slightly overhyped.

Best-supported paired with caffeine for smoother focus. As a standalone anti-anxiety or sleep cure, the evidence is thinner than the nootropic marketing suggests.

Full evidence on L-theanine →

Magnesium glycinate

▲ Trending

the gentle form everyone reaches for sleep

Marketed
Evidence
Overhyped

Marketing intensity 72 of 100. Evidence strength 50 of 100. Verdict: Overhyped.

A well-tolerated, easily-absorbed form of magnesium with a small but real sleep signal. The 'fixes your sleep and anxiety' framing still runs ahead of the data.

Full evidence on Magnesium glycinate →

Side by side

Metric L-theanine Magnesium glycinate
Overall tier Moderate Moderate
Evidence score 50/100 50/100
Hype score 68/100 72/100
Verdict Slightly overhyped Overhyped
Safety concern low low

Quick answers

L-theanine or Magnesium glycinate — which has better evidence?

Both score the same on overall evidence (50/100). The right pick depends on the specific claim and your goal — read them claim by claim.

Can you take L-theanine and Magnesium glycinate 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.