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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BioStacks

Thorne

Glycine

Capsule · 125 servings · $0.25/serving

9 / 100Very Poor

Supports

Score Breakdown

Formulation
9
Safety
100
Final score
9/100

Ingredients (1)

Glycine1 Gram(s)

33% of effective dose

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Glycine1 Gram(s)

Other Ingredients

Fillers, coatings, and additives

2Safe

Silicon DioxideAnti-caking

Safe

HypromelloseCapsule

Safe

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.