Effects of poly-gamma-glutamic acid and vitamin B<sub>6</sub> supplements on sleep status: a randomized intervention study.

Nutr Res Pract · 2021 · PMC8155219 · PMID 34093972

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an increasing trendno p-value reported

A previous animal study observed a significantly elevated glutamate and an increasing trend in GABA concentrations in serum after γ-PGA supplementation [ 10 ], but did not evaluate the γ-PGA effects on sleep status.

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