Glycine is an amino acid that is essential for cognitive and memory enhancement. Glycine is active in the hippocampus, an area of the brain important for memory and learning. In supplement form, glycine appears to deliver benefits for daytime cognitive function. In the same study that showed supplemental glycine made it easier to fall asleep and get to slow-wave sleep, scientists also found people scored higher on daytime cognition tests. And supplemental glycine has been shown to improve both memory and attention in young adults. Scientists are actively investigating the use of glycine in the treatment of neurodegenerative disorders such as Alzheimer’s disease.