Item: Kordel's Horsetail 500mg 2 x 60's Horsetail 500mg comes from the springtime European Horsetail plant. This plant is a rich, natural source of silica, with the highest bioavailability and assimilation in the body. Silica is the most active component of collagen which acts as a binding agent that keeps our cells ‘glued’ together. Sufficient silica levels in the body help skin stay soft and elastic, eyes sparkle, hair shine, and bones and teeth remain strong. Horsetail… The Easily Absorbed Form of Silica Widely found in nature, silica is better absorbed in an organic form such as that found in the herb horsetail (used in Horsetail 500mg).