by Kenda Robertson

Created on: June 23, 2009   Last Updated: July 02, 2009

As alternative and complementary health supplements become more widely accepted and available, millions of Americans are choosing to include them as part of their health regimen. Many are turning to supplements as a way to boost their immune systems, improve bodily functions and help their bodies heal more naturally.

A recent U.S. government survey, conducted as part of the National Health Interview Survey, found that 38 percent of adults, and about 12 percent of children, regularly take some type of health supplement. The most common conditions for which adults use supplements are arthritis, back and neck pain, joint pain, and other musculoskeletal ailments.

According to the survey, the five most popular health supplements used by Americans are:

Fish Oil

Available in capsule or liquid form, fish oil is rich in omega-3 fatty acids. These essential fatty acids contain DHA for a healthy nervous system, EPA for a healthy cardiovascular system and anti-inflammatory properties, and vitamin A for good vision and healthy skin.

Studies show that regularly consuming fish oil eases pain and inflammation, protects the heart, helps regulate blood sugar levels, lowers blood pressure and improves mental concentration. It also is used to treat depression and ADHD, arthritis, inflammatory bowel and colitis.

Be sure to find a brand that is free of PCBs, mercury and other chemical contaminants. It should not be taken in large quantities as it contains vitamin A, which can be toxic in high doses.

Glucosamine

This nutrient is usually taken in pill or powder form. Its main function is to build connective tissue and healthy cartilage. It also helps form protective tissues that cushion joints against excessive wear and tear.

Glucosamine also relieves pain, swelling and tenderness while it helps rebuild stiff and worn out joint tissue. When used with chrondroitins, it becomes even more powerful.

This supplement can cause heartburn, nausea and gastric pain in some people so it should be taken with food. Studies do not show any toxicity from its long-term use and it is safe to take with other supplements.

Echinacea

This herbal supplement, made from the purple cornflower, a native-American plant, can be taken in pill, powder or liquid form. It was first used in the United States in 1887 to treat minor infections, but has been studied extensively in Germany since 1938.

Echinacea is believed to fight infection by boosting the immune system and attacking viruses, including influenza, herpes and

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