A vegetarian diet can prevent heart disease, many types of cancer, diabetes, high blood pressure, stroke, obesity, and more. Vegetarians pass up flesh foods that are high in cholesterol and saturated fat, and completely lacking in dietary fibre. Plant foods on the other hand contain antioxidants and a variety of phyto-chemicals that may protect against disease.
Physicians Committee for Responsible Medicine (PCRM)
www.pcrm.org/health/veginfo/vsk/veg_foods.html

NutritionMD

Find out more about various diseases and conditions and how nutrition can play an important role in prevention and treatment. They offer a long list of diseases and conditions – from arthritis to urinary tract infection.
http://www.nutritionmd.org/consumers/index.html

Vegetarian nutrition & Health conditions affected by diet

The Analyst Online Health Service
This site has a nice summary of vegetarian/vegan nutrition concerns, and a long list of health conditions (from asthma to varicose veins) that are known to be improved by a vegetarian or vegan diet. A brief explanation of the dietary link is included for each condition, along with footnoted sources. This Naturopathic website also offers online analysis.
www.diagnose-me.com