Vitamin D tablets could be a life-saver for ... But some people are less able than others to turn "raw" vitamin D into its biologically active form. The researchers looked for genetic markers ...

A. Vitamin D comes in three main forms – Vitamin D2 (ergocalciferol), Vitamin D3 (cholecalciferol), and synthetic vitamin D (calcitriol). While calcitriol is the active form of vitamin D ...

biologically active form of vitamin D3. The ingredients are ethically sourced and made without added added filler or binders, and naturally include all forms of vitamin D, including vitamin D3 ...