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Since 1947 Provides Elemental Silicon Silicon May Support Bone Health Non-GMO Gluten, Wheat & Dairy Free Suitable for Vegans Kosher Parve Dietary SupplementSilica obtained from marine-derived Red Algae Powder (Lithothamnion corallioides) is a source of the natural trace element silicon. Silicon is found in many unrefined grains and in some seafood sources, including mussels. Silicon intake has been positively associated with bone health.