At The Nutrition Source, we receive many queries from consumers, journalists, and health professionals about nutrition. Read answers to reader questions on the following topics: 

• Healthy Eating Pyramid 
• Carbohydrates
• Protein
• Fats and Cholesterol
• Fiber
• Vegetables and Fruits
• Calcium and Milk
• Alcohol
• Vitamins
• Healthy Weight
• Beverages
  

Ask the Expert 

Professors from the Department of Nutrition at Harvard School of Public Health answer questions about their area of expertise.

• Coffee and Health: Rob van Dam, Assistant Professor, Department of Nutrition
• Controlling Your Weight: Walter Willett, Fredrick John Stare Professor of Epidemiology and Nutrition, Departments of Nutrition and Epidemiology, and Chair, Department of Nutrition
• Omega-3 Fatty Acids: Frank Sacks, Professor of Cardiovascular Disease Prevention, Department of Nutrition
  
• Vitamin D and Chronic Disease Prevention: Edward Giovannucci, Professor of Nutrition and Epidemiology, Departments of Nutrition and Epidemiology
  

Terms of Use

The aim of the Harvard School of Public Health Nutrition Source is to provide timely information on diet and nutrition for clinicians, allied health professionals, and the public. The contents of this Web site are not intended to offer personal medical advice. You should seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this Web site. The information does not mention brand names, nor does it endorse any particular products.