It's a trace element which is essential for normal growth, development of the reproductive organs, normal functioning of the prostate gland, healing of wounds and the manufacturing of proteins and nucleic acids (the building blocks for RNA and DNA). It is also necessary for over 100 different enzyme systems in the body. Suggested Use. 1 tablet daily. Do not exceed suggested use. Well Made Supplement. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance. Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone?s potential to enjoy optimal health. Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).