Research
Micronutrients & recovery
GABA supplementation (300 mg/day for 4 weeks) decreases sleep latency and increases sleep efficacy in patients with insomnia.
For insomnia, GABA supplementation of 300 mg per day for 4 weeks may help you fall asleep faster and improve sleep quality. This works by leveraging GABA's role as an inhibitory neurotransmitter.
ModerateSupportsMEDIUM confidence
There are many studies showing the sleep-promoting effect of GABA, for example, Byun et al. reported a study of 40 patients with insomnia receiving 4 weeks of GABA (300 mg/day) have decreased sleep latency and increased sleep efficacy [66].
Why this rating
Based on a cited study, but the paper notes mixed results for other supplements.
Source
The Effects of Dietary Nutrition on Sleep and Sleep Disorders
Mingxia Zhao et al. · Mediators of Inflammation · 2020
DOI 10.1155/2020/3142874
narrative_reviewCited 266×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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