The Dr. Mercola H2 Molecular Hydrogen tablets are a magnesium supplement designed for anti-aging purposes. With a concentration of 8 parts per million, these gluten-free tablets are recommended for adult use with a serving size of 1 tablet. The product comes in a pack of 30 tablets, each tablet measuring 4.17x4.49x2.28 inches, and has an expiration date of 06/2028. These all-in-one tablets aim to provide a convenient and effective way to support overall health and well-being.