Shuji Ogino, Dana-Faber Cancer Institute (IMAGE) Dana-Farber Cancer Institute Caption A new study led by Shuji Ogino at Dana-Farber Cancer Institute demonstrates vitamin D can protect some people with colorectal cancer by perking up the immune system's vigilance against tumor cells. Credit Dana-Farber Cancer Institute Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.