I was making a wrinkle cream a few years back and I would add silica to it to help with restoration of collagen and elastin.
A simple thing you can do it to take a diluted acid solution such as citric acid and add the silica to it. Shake them up so the silica has a good chance to react with the acid then let it settle out over night. Pour the solution in to a sprayer and spritz the skin after getting out of the shower and drying off. The skin is supposed to be slightly acidic. Soap and hard water make the skin too alkaline, which damages the skin. So spritzing the skin with the solution will help to restore the natural acidic pH of the skin. The citric acid will also increase the conversion of the silica in to orthosilicic acid, which is the form of silica the body uses.
If you want to make it more astringent add a small amount of hydrogen peroxide.