Glycine is one of 20 amino acids synthesized in the human body. It is also found in many foods and is especially abundant in seafood such as scallops and shrimp. Research by the Ajinomoto Group has shown that glycine, taken before bedtime, helps the body reach deep sleep more quickly. This is why glycine helps you fall asleep and improves sleep quality.Used in fortified food supplement applications or in dietary supplements, capsules,tablets or powder form.