Melatonin is a hormone produced by the pineal gland in the brain. Melatonin is thought to help our body's know when it's time to go to sleep and wake up. Melatonin supplements are available in pill form.

Information about the health benefits and side effects of the supplement melatonin.

DHEA supplements have become very popular, but there's important information you should know before using it. What is DHEA? Why is it used? What's the scientific research? What are the side effects and safety concerns?

What are the possible side effects of the supplement glucosamine?

The next step in keeping a supplement diary is to record possible side effects you are aware of.

Complete alphabetical index of herbs, supplements, and vitamins. Information about the health benefits and side effects of each.

Information about garlic, also called Allium sativum.

Information about the health benefits and side effects of the herb valerian.

Glucosamine is a natural compound that is found in healthy cartilage. Why do people use glucosamine supplements? What are the side effects and safety concerns?

Information about possible interactions between drugs, herbs, vitamins, and supplements.