BioStacksGlycine and sleep
For sleep support, Glycine is a supporting ingredient backed by research. 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. In clinical studies, glycine may support sleep quality when taken before bed.
How much glycine do you need
Research points to 3–5 g as the effective range for glycine. Common supplemental range; 3 g before bedtime has been used in small human sleep studies. Lower doses may provide some benefit, but most studies showing clear results used this range.
What the research says
The clinical evidence for glycine in sleep is moderate. A few small trials on sleep quality at 3g before bed; well-tolerated but limited study sizes Learn more
