This document discusses the health arguments for following a vegan diet. It notes that studies have shown people eating animal-based diets are more likely to have diseases like heart disease. A vegetarian diet is associated with lower obesity and reduced cardiovascular disease risk. A vegan diet can provide important nutrients but may be low in some nutrients if not planned properly. Several physician studies have argued high animal fat/protein diets can cause health issues, while a low-fat vegan diet can prevent and even reverse diseases like heart disease and diabetes. Long-term studies on vegans have shown lower cholesterol and disease rates.