Back to database
2/5 Weak evidence

Sleep / recovery evidence brief

GABA

May influence stress, sleep, or transient growth-hormone markers, but this does not establish strength, hypertrophy, or recovery benefits.

Sleep/GH claims weak recovery / focus / health 6 linked sources Content audit 2026-05-04

Headline Finding

Sleep/stress evidence is limited; transient GH-marker studies do not demonstrate anabolic outcomes.

Dose Context

Sleep trials and growth-hormone studies use different forms, doses, and timing; products are not interchangeable.

Important Caveat

Growth-hormone marker changes do not translate into proven anabolic or muscle-gain outcomes.

Source Drawer

Linked Research

6 papers and evidence links - audit 2026-05-04
  1. Systematic review Stress/sleep systematic review
  2. Trial Insomnia RCT
  3. Trial Whey/GABA training RCT
  4. Trial GH/prolactin clinical trial
  5. Review GABA and GH review
  6. Review GH exercise response summary

How To Read This Rating

The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.

Spot An Evidence Issue?

Send the disputed claim, source link, and why it changes the practical verdict. Corrections that materially affect the claim, dose, caveat, or rating are prioritized.

Report a source or rating issue