Overview 5-HTP (5-hydroxytryptophan) is a chemical by-product of the protein building block L-tryptophan. It is also produced commercially from the...

Overview Calcium is a mineral that is an essential part of bones and teeth. The heart, nerves, and blood-clotting systems also need calcium to work...

Overview Alpha-lipoic acid is a vitamin-like chemical called an antioxidant. Yeast, liver, kidney, spinach, broccoli, and potatoes are good sources...

Overview Sea buckthorn is a plant. The leaves, flowers, seeds, and fruits are used to make medicine. Sea buckthorn is used for heart health, skin ...

Overview Progesterone is a hormone that occurs naturally in the body. It can also be made in a laboratory. "Progestin" is a general term for a subs...

Overview Yohimbe is the name of an evergreen tree found in parts of central and western Africa. The bark of yohimbe contains a chemical called yohi...

Overview Lutein is a type of vitamin called a carotenoid. It is related to beta-carotene and vitamin A. Foods rich in lutein include egg yolks, bro...

Overview Glucosamine is an amino sugar that is produced naturally in humans. It is also found in seashells, or it can be made in the laboratory. Gl...

Overview Fenugreek is an herb that is similar to clover. It is native to the Mediterranean region, southern Europe, and western Asia. The seeds are...

Overview Arnica is an herb that grows mainly in Siberia and central Europe, as well as temperate climates in North America. The flowers of the plan...