Red Light, Green Light

👨‍⚕️ Who is Dr. Greger?

Michael Greger, MD, FACLM, is a physician and author who founded NutritionFacts.org, a nonprofit that shares free, science-based videos and articles on nutrition, now covering more than 2,000 topics. He wrote How Not to Die, How Not to Diet, and How Not to Age, along with companion cookbooks. NutritionFacts.org says 100% of the proceeds Dr. Greger receives from his books are donated to charity.

🟢🟡🔴 Traffic Light eating, in plain words

Dr. Greger uses a traffic-light system to rank foods by how healthful they tend to be. In simple terms:

🟢 Green light: go. Whole plant foods close to how they grow: vegetables, fruits, beans, whole grains, nuts, and seeds.
🟡 Yellow light: slow down. Foods that are more processed or that he suggests eating less often.
🔴 Red light: stop and think. The most heavily processed foods he suggests keeping to a minimum.

This is our short summary. For his exact definitions, see his free Evidence-Based Eating Guide.

🎁 Every free resource, broken out

📰 Recent articles from NutritionFacts.org

Headlines listed from NutritionFacts.org’s public feed. If the list below is empty or out of date, open the site directly.

• Can Allulose Replace Sugar?
  November 5, 2026
• A Simple Protein Swap for Healthy Aging
  November 3, 2026
• The Best Foods to Protect Against Atrial Fibrillation
  October 29, 2026
• Are Supplements the New Snake Oil?
  October 27, 2026
• The Best Foods to Fight H. Pylori
  October 22, 2026
• Yoga Put to the Test: What the Science Really Shows
  October 20, 2026

💪 Make the game work for you

💵 Tight budget: canned beans, frozen vegetables, oats, and rice are green-light foods that cost little.
😴 Tired: try a Seven-Minute Rescue Meal™.
🫘 Want a staple: The Bean Principle™.
👨‍👩‍👧 Families: play a real round of Red Light, Green Light, then grow a Rainbow Garden™ together.

⚠️ Safety first: if you take medicine for diabetes or blood pressure, or have kidney disease, food allergies, or a history of disordered eating, talk with your clinician or a registered dietitian before big diet changes. NutritionFacts.org also discusses nutrients such as vitamin B12 that people eating mostly plants may need; ask your clinician what’s right for you. Never change medications on your own.