Each serving delivers 1g of **Glycine**, but the clinical research on sleep quality used 3g before bedtime — so you'd need to take all six capsules (three servings) to reach the studied dose. At that intake, you're right at the effective minimum for supporting sleep onset and reducing next-day fatigue.
**Glycine** also serves as a building block for collagen and plays a role in creatine synthesis, giving this product relevance for skin and muscle support beyond sleep. The capsule form makes dosing flexible, which helps since individual needs vary.
The main tradeoff is pill burden. Getting to the 3g clinical dose means six capsules per night, which makes a powder format more practical for most people at this dose level.
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Every active here is dosed below the amount studied to work. See how each one compares in the breakdown below.
What it does
Glycine
Form not confirmedGrade —
Small studies suggest improved sleep in adults with sleep complaints; evidence is limited and at high risk of bias.
Ingredients (1)
Other ingredients
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
HypromelloseCapsule
Plant-derived capsule material from cellulose
Lab testing
How to take it
With or without food
On the label
Suggested use: Take 2 capsules one to three times daily or as recommended by your health-care practitioner.
Price check
$31.00
Near the median of 46 glycine supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.
Not medical advice. Consult your healthcare professional.