Increased Vitamin D supplementation helps prevent cancer

Taking Vitamin D supplementation  (1000 IU-2000 IU)  by Black and white Americans would likely reduce overall cancer incidence rates by 30% for Black Americans and 10% for white Americans and increase cancer survival rates by 20-30%. Black Americans have darker skin, it takes them 2-4 times as long in solar UVB to make the same amount of vitamin D as white Americans do.