This is an amazing documentary. Dr Greger presents all the latest in health and nutrition information, and shows how a vegan diet can prevent, treat and even reverse many of the top 20 causes of Death, including Heart Disease, Stroke and Cancer! The information presented is all based on thoroughly researched nutritional studies that have been featured in international medical journals. Check out Dr Gregers website : nutritionfacts.org/ Summary of Veganism : www.vrg.org/nutshell/vegan.htme