Aqua-proVita D3-R is a water-soluble 7-dehydrocholsterol (pre-vitamin D). The 7-DHC is normally a natural oil-soluble and unstable compound. With the help of cyclodextrin, the molecule could be made water-soluble while retaining its form. There are some water-soluble forms of vitamin D on the market, but usually only for some specific formulations such as creams. Aqua-proVita D3-R, on the other hand, can be used without restriction as in body sprays, e.g. also in hair sprays, due to its stabilisation.