Biosil is a good product. Any supplement with silicon is important to stimulate collagen production, and the ones with silicon most biologically available are those with silica in the forms of OSA, bamboo extract, or horsetail extract.

ETA: Bone health is an important aspect of adding silicon/silica, as you get the bonus of collagen stimulation, the chaperone effect of moving calcium to the bones, and the dynamic of silicon making bones more flexible as opposed to taking high doses of just calcium or prescriptions of bisphosphonates, which can make bones more brittle.