Michael Greger
Physician, founder of NutritionFacts.org
Michael Greger is an American physician who founded NutritionFacts.org, a nonprofit that publishes free videos summarizing nutrition research. He advocates a whole-food, plant-based diet and wrote How Not to Die, which introduced his Daily Dozen checklist, as well as How Not to Diet and How Not to Age. Earlier he directed public health and animal agriculture at the Humane Society of the United States.
Updated November 1, 2026 · 1 experiment · cited in 2 guides
What Michael Greger has tried
1 experiment we can source: 1 kept. Trying something is not recommending it; each entry says which.
Kept
Plant-based dietDiets and fasting
Dates not stated · Recommends it to others
Eats a whole-food plant-based diet built on his Daily Dozen, which began as his own checklist on the fridge; he says he no longer needs the checklist and encourages everyone to fit those foods into each day.
“This evolved into my Daily Dozen: the checklist of all the things I try to fit into my daily routine.”
NutritionFacts.org, Dr. Greger's Daily Dozen Checklist (video transcript, March 2018) · Status checked March 30, 2018 · Suggest a correction
Where our guides cite Michael Greger
Their public positions, summarized in our words. Follow each link for the full context.
Plant-based and vegan dietsSupport it
Promotes whole-food plant-based eating and stresses that vitamin B12 from fortified foods or supplements is critical on a plant-based diet.
HomocysteineBiomarker
Greger treats homocysteine as an important stroke risk factor and argues that the higher stroke signal seen in some vegetarians reflects low B12. He recommends that people on plant-based diets take a regular B12 supplement or eat B12-fortified foods.
NutritionFacts.org, What About Homocysteine, Vitamin B12, and Vegetarians' Stroke Risk?