Sleep Stack (Ultra-Gentle)

Public • 1/28/2026

Improves sleep quality without heavy sedation or melatonin.

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Practical pre-check

Deterministic heuristics (stimulants, duplicates, hydration). Not medical advice.

Supplements

Items in this stack

Training load

Unknown load

Need more wearable data

Stimulant estimate

0 mg

Only counts explicit caffeine items

Looks clean

No obvious duplication/stimulant/hydration flags from the heuristic pass.

AI risk assessment

Context: No wearable data

No assessment yet.

Supplements

1 items

GlycineModerate

Before bed • Powder • Click to expand

Supports sleep onset and perceived sleep quality.

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3000mg

Daytime sleepiness and performance after sleep restriction

Moderate

Population: Healthy adults with partial sleep restriction

Study type: RCT (double-blind, placebo-controlled, crossover)

Dose context: 3000 mg typical (range: 3000–3000 mg) • Duration: 3 nights

3 g glycine before bed significantly reduced daytime sleepiness, fatigue, and cognitive impairment following 25% sleep restriction; mechanism involves core body temperature reduction via SCN NMDA receptors.

Citation: Bannai M et al. Front Neurol. 2012;3:61.•DOI: 10.3389/fneur.2012.00061•https://pubmed.ncbi.nlm.nih.gov/22529837/

Well-tolerated at 3 g; higher doses not well-characterized for sleep specifically.

Collagen synthesis / connective tissue support

Moderate

Population: Recreationally active males

Study type: RCT (mechanistic)

Dose context: 15000 mg typical (range: 5000–15000 mg) • Duration: Acute (pre-exercise)

15 g gelatin (rich in glycine and proline, with vitamin C) before intermittent exercise doubled collagen synthesis markers (P1NP) vs. placebo; glycine is the most abundant amino acid in collagen (~33%).

Citation: Shaw G et al. Am J Clin Nutr. 2017;105(1):136–143.•DOI: 10.3945/ajcn.116.138594•https://pubmed.ncbi.nlm.nih.gov/27852613/

Study used gelatin + vitamin C, not isolated glycine; glycine is rate-limiting for collagen synthesis.