Michael Greger MD

Michael Greger MD

Posted August 6, 2015

Published in Health

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Dr. Greger Takes on Smoothies in New DVD

Read More: DVD

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Smoothies have been one of the most requested topics, but for years there seemed to be little pertinent research. I was surprised when I reprised my search this year to find hundreds of studies, so it's smoothie-time! I rarely do such long contiguous video series any more, but I had neglected the topic for so long I wanted to get them out. I review the latest science in five new videos:
  • Are Green Smoothies Good for You?
  • Are Green Smoothies Bad for You?
  • Green Smoothies: What Does the Science Say?
  • Liquid Calories: Do Smoothies Lead to Weight Gain?
  • The Downside of Green Smoothies

They are available right now as a video download as part of my new Latest in Clinical Nutrition volume 26 (all proceeds go to charity). It can also be ordered as a physical DVD. The smoothie videos are all scheduled to go up on in September, but you can download and watch them right now.

Wait a second. Why spend five videos sifting through the science, profiling all the original experiments, and turning it into one big detective story when I could have just cut to the chase and did a five second video and basically said "Drink them" or "Don't drink them"? Because I don't want you to ever do anything just because I or anyone else "said so." That's one of the problems with the field of nutrition. Everyone seems to have their respective gurus who too often make pronouncements without explaining their reasoning and citing their sources. Can you imagine that flying in any other field of science? It's not what he said or she said; it's that the best available balance of evidence bears out. Two plus two equals four no matter what your favorite mathematician says.

The current batch of videos from volume 25 on just ran out, so starting now and running until October, I'll be rolling out the videos from this new DVD, volume 26. The DVDs give folks the opportunity to sneak-preview videos months ahead of time, watch them all straight through, and share them as gifts, but there is nothing on the DVDs that won't eventually end up free online at If you'd like the works--40+ hours of video--you can get the complete DVD collection.
Here's the list of chapters from the new volume 26 DVD -- a preview of what's to come over the next few months on
  1. Brown Fat: Losing Weight Through Thermogenesis
  2. Boosting Brown Fat Through Diet
  3. High Blood Pressure May Be a Choice
  4. Does Chocolate Cause Weight Gain?
  5. Fatty Meals May Impair Artery Function
  6. Olive Oil and Artery Function
  7. Coffee and Mortality
  8. Why is Meat a Risk Factor for Diabetes?
  9. How May Plants Protect Against Diabetes?
  10. Treating Dry Eye Disease with Diet: Just Add Water?
  11. Putrefying Protein and "Toxifying" Enzymes
  12. How to Reduce Carcinogenic Bile Acid Production
  13. Are Green Smoothies Good for You?
  14. Are Green Smoothies Bad for You?
  15. Green Smoothies: What Does the Science Say?
  16. Liquid Calories: Do Smoothies Lead to Weight Gain?
  17. The Downside of Green Smoothies
  18. Diet and Climate Change: Cooking Up a Storm
  19. Music for Anxiety: Mozart vs. Metal
  20. Plant-Based Diets for Improved Mood and Productivity
  21. Caution: Anti-inflammatory Foods in the Third Trimester
  22. Alzheimer's May Start Decades Before Diagnosis
  23. Alzheimer's and Atherosclerosis of the Brain
  24. Whole Beets vs. Juice for Improving Athletic Performance
  25. Oxygenating Blood With Nitrate-Rich Vegetables
  26. The Okinawa Diet: Living to 100

Order my new DVD at or through Amazon. It can also be ordered as a video download at

DVD Subscription

If you were a regular supporter, you'd already be a smoothie expert by now, having already received the new DVD. I now come out with new DVDs every 9 weeks. If you'd like to automatically receive them before they're even available to the public, please consider becoming a monthly donor.

Anyone signing up on the donation page to become a $15 monthly contributor will receive the next three DVDs for free (as physical DVDs, downloads, or both--your choice), and anyone signing up as a $25 monthly contributor will get a whole year's worth of new DVDs. If you're already signed up and didn't receive your volume 26 yet, please email and she'll make everything all better.

If you'd rather just watch all the videos online as they launch, but would still like to support my work of helping to educate millions about healthy eating, you can make a tax-deductible donation to my 501c3 nonprofit organization using a credit card, a direct PayPal link, or by sending a check to "" PO Box 11400, Takoma Park, MD 20913.

The Nutritional Yeast Research Results Are In

Thanks to everyone who donated to the Research Fund, we were able to test eight brands of nutritional yeast for the presence of the toxic heavy metal lead. The good news is that we couldn't find any in most brands, but a few did have detectable levels. The lead contamination was so low that all brands complied with the exceedingly (and justifiably) strict California Prop 65 standards, but I do I advise pregnant women who eat more than a third of a cup a day on a regular basis choose one of the brands that tested free from detectable lead until we know more. Joseph includes details and direct links to all the testing reports in this morning's blog post Three Brands of Nutritional Yeast Contain Detectable Lead Levels But the Risk is Minimal. What should we test next? Please post your suggestions to the Research Fund page.

If you would like to participate in a research study yourself, you're in luck! Scientists at Tufts University are currently recruiting adults ages 18+ for an important study on diet and disease. Take the recruitment survey here:

If you'd like to attend a scientific conference and directly learn about cutting-edge nutrition research, I'm speaking at a few in the coming months and would love to see you there:

Keep hydrated out there!

-Michael Greger