high strength silica 200mg, top quality from bamboo extract (not horsetail),easy to swallow, small, veggie capsules,silica is a trace mineral which is only required by the body in small amounts and whilst there is no nrv for silica, most nutritionists agree that a daily intake from our diet is important.silica is found in compounds called glycosaminoglycans, which are components of structural tissues such as arteries, tendons, skin, bones and cartilage.most silica supplements use silica extracted from horsetail but at nature\'s best we prefer to use bamboo gum as a source of natural silica. bamboo gum contains over 90% organic silica, which is more than 10 times the level found in the widely used horsetail plant, where the level is as low as 5-7%.good dietary sources of silica include grains such as oats, barley and rice, although refining processes can strip much of this mineral away.silica has become a popular supplement for healthy skin and joint health.