A major reproducible study found that glycine supplementation led to a statistically significant 4-6% increase in the lifespan of mice.

The best natural food sources of glycine are animal products that are rich in collagen, such as skin.

A study found that adding high-dose glycine to standard treatments for schizophrenia resulted in a 23% reduction in negative symptoms.

Genetic analysis suggests that higher glycine levels are a direct cause of better heart health outcomes, not just a correlation.

In people with metabolic syndrome, glycine supplements were found to reduce oxidative stress and lower blood pressure.

Glycine helps initiate sleep by increasing blood flow to the skin, which helps to lower core body temperature, signaling to the body it's time for sleep.

Unlike many sleep medications, glycine improves sleep quality without disrupting the natural sleep architecture, avoiding next-day grogginess.

Boosting glycine intake might have a similar positive impact on longevity as reducing the consumption of the amino acid methionine.