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Scored forOutcome alternatives
Zint2 lb • 75 servingsAvailable now$37.39$0.50 / serving4.7 · 2,101 ratings3 / day
80−14 pts from leader
#631 of 7239 ranked for sleep qualityLeader · Source Naturals, Source Naturals, Sleep Science®, NightRest™ With Melatonin, 100 Tablets — 94
Why this ranks #631 for sleep quality
- Evidence fitGlycine and L-Serine have moderate human evidence for this outcome.
- Dose fit0 of 2 dosed ingredients land in the studied range. Glycine at 4796 mg is higher than the studied 3-5 g window.
- Price / serving$0.50 per serving — high price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustSolid trust signals from buyer ratings, with room to grow.
Trade-offsValue for money trails the rest of this listPopularity trails the other picks here
The numbers · Sleep qualityWhat's inside
80
87
88
91
4796 mgAbove rangehigher than the studied 3-5 g window
144.1 mgBelow rangebelow the studied 3000-3000 mg window
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