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-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 ...

Your body needs arginine, more commonly known as L-arginine in supplement form, to carry out several important functions. It’s an amino acid that helps build proteins. It’s especially important for ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Marguerita is a Certified Financial Planner (CFP), Chartered Retirement Planning Counselor ...

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 ...

Note: The U.S. Food and Drug Administration (FDA) does not approve supplements for safety or effectiveness. Talk to a healthcare professional about whether a supplement is the right fit for your ...

Your body is an amazing collection of parts, from big things like your bones to tiny elements like amino acids. Amino acids are important—they make up proteins that build muscle and bone—and you can ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...