Thinning hair, dull skin and splitting nails can often be improved through supplementation. Allergen Free. This formula contains Silica from horsetail as well as colloidal (mineral) silica. They work together to strengthen these connective tissues and reverse the problem areas. Directions:Take 1 tablet up to twice daily, preferably with a meal. Ingredients:Horsetail Extract, Colloidal Hydrophilic Silica Gel, Cellulose, Stearic Acid (Vegetable Source), Acacia Gum.Caution:Keep out of reach of children. Women who are pregnant or planning pregnancy should consult their doctor before taking food supplements. Do not exceed recommended daily intake.