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Scored forOutcome alternatives
Zint16 oz • 38 servingsAvailable now$26.59$0.70 / serving4.7 · 20,676 ratings6 / day
72−22 pts from leader
#1414 of 7239 ranked for sleep qualityLeader · Source Naturals, Source Naturals, Sleep Science®, NightRest™ With Melatonin, 100 Tablets — 94
Why this ranks #1414 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 2801 mg is higher than the studied 3-5 g window.
- Price / serving$0.70 per serving — high price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustStrong trust signals — consistently high marks from verified buyer ratings.
Trade-offsValue for money trails the rest of this listDose fit is the weak spot on this list
The numbers · Sleep qualityWhat's inside
72
78
51
80
2801 mgAbove rangehigher than the studied 3-5 g window
390 mgBelow rangebelow the studied 3000-3000 mg window
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