I started using Silica Plus four years ago, when my hair and skin were in awful shape after two years' anxiety over my terminally ill father. At the time, I bought some other products too, such as Imedeen, so wasn't sure if the amazing results were due to silica or something else.
Since then I dropped the silica and carried on with Imedeen, and my skin deteriorated again - wrinkles and crepiness returned. This summer I reverted to Silica Plus and once again the difference is noticeable. Hair and skin are hugely improved, and it's a product no middle-aged woman should be without. Fantastic stuff.