Image HNSTM is a proprietary blend of nutrients, including horsetail extract, a rich source of silica, necessary to promote healthy hair, nails and skin.* CONCEPT Horsetail (Equisetum arvense) is a perennial plant that existed in prehistoric time and is a remarkably rich and natural source of easy-to-absorb silica. The body uses the silica compound to keep connective tissues like hair, skin, nails, and even joint cartilage healthy and strong. * Adequate nutrition is necessary for the health of your hair, nails, and skin. In addition to vitamins and minerals, the body requires antioxidants to fight free radical damage and other compounds, like silica, to maintain the strength and integrity of the numerous tissues throughout the body. Image HNSTM supplies your body with an excellent source of many essential vitamins to assist in normal health and well-being.