GABA and sleep

What 2 graded rows on gaba agree on for sleep, and where they differ. Counted side by side, never averaged.

Consensus finder Rows from the GABA page, reviewed Oct 21, 2026 How it decides

What the rows agree on

Each block and row is one graded row from the GABA page, with its PubMed record.

Supplement

GABA Choose another

2 rows · 70 people

They agree: both rows found an improvement.

No difference

Improved

Each block is one evidence row, sized by how many people it enrolled, with its grade inside.

From the rows

The best-graded row, grade D, is a randomized trial of 40 people (2018) and found an improvement.

The rows run from 30 to 40 people, published from 2018 to 2024: 2 single studies.

2 improved

Grade DSleep latency and efficiency on polysomnography · Improved
RCT · n 40 · 2018 · Adults with insomnia symptoms (30 on GABA, 10 on placebo)
300 mg/day · 4 weeks
Time to fall asleep fell from about 13 to 6 minutes and sleep efficiency rose from 79% to 86% in the GABA group only; results were reported as within-group changes in a small, unbalanced trial.
Row on the GABA page · PubMed 29856155 (opens PubMed)
Grade DSleep quality, mood and heart-rate variability during an exercise programme · Improved
RCT · n 30 · 2024 · Sedentary women with overweight or obesity starting physical exercise
200 mg/day · 90 days
Habitual sleep efficiency (PSQI), negative mood, depression scores (DASS-21) and heart-rate variability improved with GABA; the abstract does not give effect sizes versus placebo.
Row on the GABA page · PubMed 38321713 (opens PubMed)