Sulfur: Sulfur is a naturally occurring mineral that is found primarily near hot springs and volcanic craters. Sulfur has a distinct "rotten egg" smell which is caused by sulfur dioxide gas escaping into the air. It is available in two supplement forms -- dimethyl sulfoxide (DMSO) and methylsulfonylmethane (MSM) -- and both forms have been touted widely as effective treatments for pain. Sulfur is vital for healthy hair, skin and nails. It also plays an important role in helping to maintain a proper oxygen balance so the brain can function properly. Sulfur acts as a helper to B-Vitamins and helps the liver in the secretion of bile.

Sulfur is part of the chemical structure of three different amino acids (the building blocks that make up protein) -- namely, cystine, cysteine, and methionine. Sulfur works with vitamins B1 (thiamine), B5 (pantothenic acid), and H (biotin) to promote metabolism and communication between nerve cells. Sulfur is found abundantly in keratin, a protein that strengthens hair, nails, and skin. Occasionally referred to as "nature's beauty mineral," sulfur plays a role in the production of collagen, a protein that helps keep skin elastic and healthy.

Sulfur-containing mud baths (often called balneotherapy) help in the treatment of skin disorders and arthritis. Balneotherapy is one of the oldest forms of therapy for pain relief for people with arthritis. The term "balneo" comes from the Latin word for bath (balneum) and refers to bathing in thermal or mineral waters. Some people also claim that these baths are useful for allergies and respiratory disorders.

The elemental mineral form of sulfur is found in rocks near hot springs and volcanoes. The form the body ingests is found in protein-rich foods such as eggs, meat, poultry, fish, and legumes. Other good sources include garlic, onions, brussels sprouts, asparagus, kale, and wheat germ.