Research utilizing combined data from 17 studies that included more than 12,000 people from the U.S., Europe, and Asia found that optimal levels of vitamin D for colon cancer prevention are higher than the current U.S. recommendation of 600 international units (IU) per day. by Joe Battaglia In the absence of Vitamin D from sunlight, … Continue reading 17 Studies from 3 Continents: Higher Than Recommended Doses of Vitamin D Prevents Cancer