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GNC products are quality, scientifically developed nutritional supplements, created with the assistance of a medical board of licensed professionals, using top level ingredients, according to GNC.com. The website posts a quality guarantee, 150 quality checks, and a 30-day money back guarantee, backi


GNC products can be purchased directly from the company on their website GNC.com. The website offers many sales and promotions on their products available online. Low-cost, flat-rate shipping is available for online purchases.


Not all products sold at GNC are safe, and examples of unsafe products found in GNC stores include Jack3d, OxyElite Pro and Craze. In 2013, WTAE Pittsburgh reports that GNC voluntarily destroyed 1,542 cases of products that were deemed to be possibly unsafe.


GNC explains that the company's fat burners are nutritional supplements that contain chemicals and herbs that stimulate thermogenesis and weight loss. Some of its brand-name fat-burning products are Nutrex Research, Inc. LIPO 6 Black Ultra Concentrate and HERS Ultra Concentrate, Cellucor D4 Thermal


According to GNC.com, GNC Mega Men Multivitamins improve colon health, provide immune support, help increase energy, improve prostrate health and fight cellular aging. They are infused with nutrients, such as vitamin D-3, vitamin B, vitamin E and lycopene.


GNC's Preventive Nutrition Cleansing Formula is a health supplement that supplies digestive enzymes, acidophilus and fiber, according to the GNC website. It is said to help aid in digestive health.


According to the search engine on GNC's website, the nutrition store does not sell kava as of April 2014. Kava is available for purchase at Walmart and a variety of online stores.


GNC Total Lean CLA contains 2,000 milligrams of conjugated linoleic acid from safflower oil, along with glycerin and gelatin, states GNC. The supplement does not contain sugar, starch, wheat, gluten or corn. In addition, GNC Total Lean CLA does not contain preservatives, sodium, soy, dairy, or artif


Taking vitamins works, but they're not always necessary and they shouldn't replace good nutrition, according to Mayo Clinic. Some people benefit from taking vitamins, like pregnant women who need prenatal supplements.


According to the National Institutes of Health Office of Dietary Supplements, sources of vitamin A include cooked sweet potato, beef liver, spinach, carrots, cantaloupe and mangoes. The highest amount of vitamin A is found in liver and fish oils.