Apigenin vs Glycine
Both are used for sleep better. Here's how they compare on human evidence, mechanism, safety and availability — in plain English.
| Apigenin | Glycine | |
|---|---|---|
| Human evidence | ★★☆☆☆ | ★★★☆☆ |
| Legal status | OTC Supplement | OTC Supplement |
| How it works | Chamomile flavonoid, a benzodiazepine-site GABA-A ligand (mild) and adenosine modulator; also a mild aromatase inhibitor. | Smallest amino acid; inhibitory neurotransmitter at spinal/brainstem glycine receptors (GLRA1), lowers core body temperature (a sleep-onset trigger) via peripheral vasodilation, and supplies one-third of collagen's amino acids. Mimics some… |
| In plain English | The calming molecule in chamomile tea — a gentle nudge on the brain's "slow down" system for easier sleep onset. | An amino acid that gently cools you down and quiets the nervous system for sleep, and is the main brick in collagen. Dirt cheap, very safe. |
| Bottom line | Mild, safe sleep-onset aid. | One of the most undervalued supplements — sleep + connective tissue + longevity. |
| Availability | Available over the counter | Available over the counter |
Which is better for sleep better?
We do not publish an indication-specific evidence grade for Apigenin or Glycine for sleep better, so we are not going to name a winner. The star ratings shown below are whole-compound summaries across everything each has been studied for — they are not a grade for this use, and comparing them here would be misleading. What actually differs is mechanism, side-effect profile, interactions, availability and cost. Those are compared in full below.
Common questions
Is Apigenin or Glycine better for sleep better?
We do not publish an indication-specific evidence grade for Apigenin or Glycine for sleep better, so we are not going to name a winner. The star ratings shown below are whole-compound summaries across everything each has been studied for — they are not a grade for this use, and comparing them here would be misleading. What actually differs is mechanism, side-effect profile, interactions, availability and cost. Those are compared in full below.
What's the difference between Apigenin and Glycine?
Apigenin: Mild, safe sleep-onset aid. — Glycine: One of the most undervalued supplements — sleep + connective tissue + longevity.