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 is an amino acid produced by the body and found in some foods and supplements. It may offer some health benefits, including increased weight loss, improved brain function, and more.

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 ...