Silica is a naturally occuring non-metallic element, also known as silicon.&ampnbsp;It is a component of certain bodily polysaccharide structures such as hair, skin, and nails.&ampnbsp;Our Silica is derived from Horsetail Extract and is throughly screened for potency and purity.&ampnbsp;We have complexed the silica in this supplement with other synergistic ingredients for a truly effective dietary supplement.*