The amino acid known as L-citrulline is made naturally in your body. Research isn’t clear whether these supplements will help boost exercise performance, lower blood pressure, or help with erectile ...

L-theanine is a compound that may support thinking, sleep, and relaxation and help with weight loss, blood pressure, and more. Research suggests that L-theanine might provide a range of health ...

L-citrulline is a substance called a non-essential amino acid. Your kidneys change L-citrulline into another amino acid called L-arginine and a chemical called nitric oxide. These compounds are ...

L-theanine is an amino acid found primarily in green and black tea and some mushrooms. It’s also available in pill or tablet form. It’s said to help ease anxiety, stress, and reduce insomnia. Before ...

L-carnitine, also known as levocarnitine, is a naturally occurring amino acid structure that the body produces. It plays a critical role in energy production, converting fat into energy. Most people ...