Silica 500 mg Vegetarian - 90 Tabs (or silicon as it’s technically known) is a completely natural, non-metallic element found in specific polysaccharide structures – especially our skin, hair and nails. Derived from 100% horsetail extract and thoroughly screened for purity and potency, NOW Silica Complex is a unique, synergistic blend of nutrients that may improve the quality of these protein rich components, essential to natural beauty