L-Ascorbic Acid, Free Acid protects cells against the damaging effects of radiation and oxygen radicals. L-Ascorbic Acid increases the rate of mineralization in osteoblasts, is involved in hydroxylation of proline and lysine, reduces Na+/Ca2+exchange in cultured astrocytes and modulates cyclic nucleotide levels in B and T cells inhibits apoptosis in cultured rat ovarian follicles. Shown to inhibit T-type Ca++ CP α 1H.