Glycine vs Tart Cherry for sleep
Short answer: For sleep, more users report improvement with Tart Cherry — 94% of 35 reports, versus 87% of 255 for Glycine.
Glycine has 392 meta-analyses and 620 randomized trials on PubMed; Tart Cherry has 15 and 51.
Based on 695 reports about Glycine and 102 about Tart Cherry. Not medical advice.
| Glycine Supplement | Tart Cherry Supplement | |
|---|---|---|
| Users say it helped | 70%helped299 reports · high confidence | 75%helped45 reports · medium confidence |
| Verdict | Mostly positive | Mostly positive |
| Research | AResearch: Strong | AResearch: Strong |
| Meta-analyses / RCTs | 392 / 620 | 15 / 51 |
| Mainly used for | ||
| Sleep % reporting improvement | 87% (255) | 94% (35) |
| Anxiety % reporting improvement | 78% (60) | 50% (2) |
| Mood % reporting improvement | 87% (39) | — |
| Energy % reporting improvement | 94% (17) | 50% (2) |
| Recovery % reporting improvement | 100% (9) | 100% (9) |
| Common side effects | vivid dreams, drowsiness, fatigue, brain fog | headache, vivid dreams, anxiety, prolonged erection |
| Typical dose reported | 2 g / daily | 1000 mg / before bed |
In studies using high-throughput metabolomics, several blood amino acids appear to be consistently associated with the risk of developing type 2 diabetes.
Diabetes Care, 2016 ↗“2 grams with 200mg magnesium before bed gives me crazy good sleep. Crazy vivid dreams.”
No significant effects were observed for creatine kinase and tumor necrosis factor alpha. These results indicate that the consumption of a TC supplement can aid aspects of recovery from strenuous exercise.
Int J Sport Nutr Exerc Metab, 2021 ↗“Tart cherry juice increases melatonin levels and is supposed to improve sleep quality. It worked surprisingly well for me when I tried it.”
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Percentages come from first-hand user reports and are not clinical outcomes. Talk to a doctor before starting, stopping or combining anything. How we rate