vitamin335 | P a g e BAB II TINJAUAN PUSTAKA 2.1. Vitamin C 2.1.1 Pengertian vitamin C Vitamin C atau asam askorbat adalah senyawa kimia yang larut dalam air.Vitamin D is a fat-soluble vitamin that regulates calcium and phosphate homeostasis and is therefore vital for musculoskeletal health. Vitamin D circulates in the blood as both vitamin