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Sleep Stack (Ultra-Gentle)

Improves sleep quality without heavy sedation or melatonin.

What this is for
General support
sleep, caffeine-sensitive, gentle
Why you are seeing this
Goal fit: sleep, caffeine-sensitive, gentle.
What to do next
Add body metrics if you want dose previews to reflect your weight rather than the reference dose.
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Public•Built 28 Jan 2026•1 ingredients•No interactions detected
Core stack
The main ingredients doing the work.
1 key items
GlycineModerate
Before bed • Powder •
Supports sleep onset & perceived sleep quality.
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3000mg
Daytime sleepiness & 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, & 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 & 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.
Stack pre-check
No personal data connected — connect wearables or upload bloodwork for a personalised check
Clean
Supplements
1
Training load
Unknown
No flags
No duplication, stimulant, interaction, or recovery concerns detected.

Pre-check is rule-based, not medical advice. Consult a healthcare professional for personalised guidance.

Interaction Analysis
Pharmacokinetic + pair-level checks
Timing optimizations
Glycine
Before bed
Glycine lowers core body temperature and improves slow-wave sleep. 3g ~30–60 min before bed is the studied dose. (Onset: ~30 min, half-life: ~2h)

Interaction analysis is based on peer-reviewed pharmacology. PMID links go to PubMed. Not medical advice.

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