Silica hair loss benefits and food sources Feb 24, 2010 1:24:00 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Mod on Feb 24, 2010 1:24:00 GMT -5 Strengthens hair and prevents hair loss. Daily dose: 55 mcg. Food sources: Seafood, rice, soybeans, green vegetables.