, high strength silica 200mg finest 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 & 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 & 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 & rice although refining processes can strip much of this mineral away.silica has become a popular supplement for healthy skin & joint health.