Herbal Supplement Guaranteed Potency 10% Vegetal Silica from Springtime Horsetail World Organic SILICA 500 contains the highest potency of actual Silica of any leading brand. Our special formulation combines the whole herb with all of the naturally occurring flavones found in springtime horsetail herb, as well an extra high potency extract to provide a balanced source of vegetal Silica. In the human body silica is found in the hair, nails and bones. Preservative free tablet! Contains no sugar, starch, yeast, wheat, corn, artificial color or flavor. Note: Due to improve extraction procedures the natural color of the table is slightly changed form the recent past. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.