Peggy Sue Chan (South Houston, Texas, USA) on 08/17/2009:

I don't have hot flashes when I drink it. I took several tablespoons twice daily, and the next day the flashes quit. I vacationed in the Carribbean without air conditioning for two weeks, and the flashes still didn't happen.

I also quit having gluteal hamstring pulls--

I have no idea why they quit the day after I began taking the silica. I'd had them for 5 years previously, as long as I'd been running. However, four months ago I changed my running form from heel strike to forefoot strike, and the hamstring pulls never recurred, even without my taking silica. Strange, but my knees and ankles quit hurting when I changed form, too.

When I quit taking silica, however, my hot flashes returned.

I can't tell what else silica did for me because I am not aware of having any other health problems.