The zinc gluconate type comes in a concentrated dose of 50 mg, which is safe and effective. It is produced from a natural source and of high quality. The minerals from Solgar are an original patent of the Albion company that guarantees quality products with better absorption in the body. There are no preservatives, sugar, or salt, and it does not contain yeast, wheat, soy, milk, sweeteners, artificial flavors, or colors. Vegan Instructions for use: The recommended optimal daily dose is one tablet per day or a doctor's and another professional's instructions. Kosher for Passover Parve is supervised by KOF-K New Jersey, USA. Content: 100 tablets