BioStacksGlycine and skin
Glycine plays a supporting role in skin. Glycine is a non-essential amino acid. Supplemental glycine (often ~3 g taken before bed) has been studied for sleep quality and next-day fatigue in small trials.
What dose to look for
Clinical studies typically use 3–5 g of glycine. Common supplemental range; 3 g before bedtime has been used in small human sleep studies. Supplements that fall short of this threshold are unlikely to match what clinical trials achieved.
What the research says
The clinical evidence for glycine in skin is moderate. A few small trials on sleep quality at 3g before bed; well-tolerated but limited study sizes Learn more
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