Pure L-glycine. 3 grams before bed has small-trial evidence for improving subjective sleep quality. Sweet-tasting on its own, mixes in tea.
What it is
Life Extension L-Glycine Powder is a category-leading product in the sleep space. Editorially-selected for sleep, amino-acids use cases. The label declares third-party testing where applicable.
Suggested use
Follow label dosing. As with any supplement, talk to a clinician before starting if you take prescription medications or have a chronic condition.
A note on selection
We list products that have a real track record (years of use, real users, published research where available) and avoid the wellness-aisle proprietary blends that hide doses behind 'patented formula' language.