The Desi TV USA on Instagram: "Vitamin B12 plays a key role in helping the bone marrow make new red blood cells. As young blood cells prepare to divide, they must build fresh DNA for each step of growth. Vitamin B 12 supports the enzymes that guide this DNA construction. When the vitamin is lacking, the cells struggle to form complete DNA and become large and fragile because they attempt to divide without the proper instructions. These weakened cells cannot mature normally. The marrow releases f