Vitamins are nutrients that an organism requires in very small amounts and that usually cannot be synthesized by the organism in sufficient quantities. By convention, the term vitamin does not include nutrients such as dietary minerals, essential fatty acids, or essential amino acids (which are needed in greater amounts than vitamins) nor the great number of other nutrients that promote health, and are required less often to maintain the health of the organism.  Vitamins are classified by their biological and chemical activity, not their structure. Thus, each "vitamin" refers to a number of vitamer compounds that all show the biological activity associated with a particular vitamin. Such a set of chemicals is grouped under an alphabetized vitamin "generic descriptor" title, such as "vitamin A", which includes the compounds retinal, retinol, and four known carotenoids. Vitamers by definition are convertible to the active form of the vitamin in the body, and are sometimes inter-convertible to one another, as well.

EPL BAS analyzes these important nutrients in a variety of matrices and has methods and technologies that include the following vitamins: 

• A (beta-Carotene)                                      
• A (Retinyl Acetate)

• B1 (Thiamine)
• B2 (Riboflavin)
• B3 (Niacin)
• B5 (Pantothenic Acid)
• B6 (Pyridoxine)
• B7 (Biotin)
• B9 (Folic Acid)
• B12 (Cobalamin)
• Choline

• Vitamin C (L-Ascorbic Acid)

• Vitamin D3 (Cholecalciferol)

• Vitamin E (Tocopherol)

– Alpha Tocopherol
– Beta Tocopherol
– Delta Tocopherol
– Gamma Tocopherol

• Vitamin E (Tocotrienol)

– Alpha Tocotrienol
– Beta Tocotrienol
– Delta Tocotrienol
– Gamma Tocotrienol

• Vitamin K1 (Phylloquinone)

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