Now Vitamin D is making headlines as a possible factor to prevent and treat COVID-19. Vitamin D is vital in allowing your body to absorb calcium to strengthen bones. “Vitamin D is certainly a good thing if a physician recommends it,” said Jeffrey Drebin, MD, PhD Chair, of the Department of Surgery at Memorial Sloan Kettering Cancer Center. Too much Vitamin D can be toxic and lead to heart and kidney problems. Two population groups most commonly affected by Vitamin D deficiencies are African Americans and the elderly, the two groups also most impacted by COVID-19.