Horsetailopen_in_newbotanicalHorsetail (Equisetum arvense) is a botanical rich in silica, which supports connective tissue health. It is commonly used for hair, skin, and nails and may also support bone health and have mild diuretic effects.$19.76 median price$0.53 per serving$0.08 per 10 mg67 mg per serving Show details expand_more