Effect of a Combination of Magnesium, B Vitamins, Rhodiola, and Green Tea (L-Theanine) on Chronically Stressed Healthy Individuals-A Randomized, Placebo-Controlled Study.

Nutrients · 2022 · PMC9102162 · PMID 35565828

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showed a trendno p-value reported

The study also showed a trend toward improvement in the QoL in terms of improvement in daytime dysfunction due to sleepiness.

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