HSN-W® (Hair, Skin and Nails Formula) [Structural, Hair] contains dulse plant, horsetail herb, sage leaves and rosemary leaves. These botanicals provide significant amounts of herbal silicon (27.9 mg per 100 grams). As reported by the National Research Council, silicon deficiency leads to structural abnormalities of the long bones and skull in chickens, leading researchers to conclude it is important to the human structural system. Silicon is also important to the proper utilization of calcium, a key mineral for the structural system. HSN-W is available in gelatin capsules and all-botanical Vegitabs®. Take 3 capsules/tablets with a meal twice daily. Stock No. 935-4 (100) capsules Stock No. 933-2 (100) Vegitabs