Threonine plays a key role in maintaining healthy skin and teeth. Since threonine is found largely in the central nervous system, studies have shown that it can be helpful in treating different types of depression.
Once in the body, threonine changes into a chemical called glycine. Glycine helps produce elastin, collagen, and muscle tissue.
When combined with methionine (another amino acid), glycine helps process fatty acids and helps prevent liver failure.