Friday Favorites: Are BCAA (Branched Chain Amino Acids) Healthy?

Why we may want to strive not to exceed the recommended intake of protein.

So rather than Do Vegetarians Get Enough Protein?, the question shifts to how do omnivores not get too much?
This may help explain some of the benefits of plant-based proteins:
• What Diet Should Physicians Recommend? (https://nutritionfacts.org/video/what-diet-should-physicians-recommend)
• The Okinawa Diet: Living to 100 (https://nutritionfacts.org/video/the-okinawa-diet-living-to-100)
• Do Flexitarians Live Longer? (https://nutritionfacts.org/video/do-flexitarians-live-longer)
• Caloric Restriction vs. Plant-Based Diets (https://nutritionfacts.org/video/caloric-restriction-vs-plant-based-diets)<br />• Plant-Based Diets and Diabetes (https://nutritionfacts.org/video/plant-based-diets-and-diabetes)
• Plant-Based Diets Recognized by Diabetes Associations (http://nutritionfacts.org/video/plant-based-diets-recognized-by-diabetes-associations)
• Animal Protein vs. Plant-Based Protein (https://nutritionfacts.org/video/animal-protein-vs-plant-based-protein/)
• The Environmental Impacts of Plant-Based Meat Substitutes (https://nutritionfacts.org/video/the-environmental-impacts-of-plant-based-meat-substitutes/)
• Are Beyond Meat and the Impossible Burger Healthful? (http://nutritionfacts.org/video/are-beyond-meat-and-the-impossible-burger-healthy)
• Are Pea and Soy Protein Isolates Harmful? (https://nutritionfacts.org/video/plant-based-protein-are-pea-and-soy-protein-isolates-harmful/)
• Plant-Based Meat Substitutes Put to the Test (http://nutritionfacts.org/video/plant-based-meat-substitutes-put-to-the-test)
• The Health Effects of Mycoprotein (Quorn) Products vs BCAAs in Meat (http://nutritionfacts.org/video/the-health-effects-of-mycoprotein-quorn-products-vs-bcaas-in-meat)
• What About the Heme in Impossible Burgers? (http://nutritionfacts.org/video/what-about-the-heme-in-impossible-burgers)
• Does Heme Iron Cause Cancer? (http://nutritionfacts.org/video/does-heme-iron-cause-cancer)
• Heme-Induced N-Nitroso Compounds and Fat Oxidation (http://nutritionfacts.org/video/heme-induced-n-nitroso-compounds-and-fat-oxidation)
• Is Heme the Reason Meat Is Carcinogenic? (http://nutritionfacts.org/video/is-heme-iron-the-reason-meat-is-carcinogenic)

Of course the best way to treat type 2 diabetes is to get rid of it by treating the underlying cause: How Not to Die from Diabetes (https://nutritionfacts.org/video/how-not-to-die-from-diabetes/).

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-Michael Greger, MD FACLM

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34 Risposte a “Friday Favorites: Are BCAA (Branched Chain Amino Acids) Healthy?”

  1. Absolutely loved this. Explains a lot of my own personal experiences. Will be sharing on a recent post I wrote about weight loss tips after finally losing my own ‘stubborn’ last 10 – 15 pounds (and I’m under 5 feet and 60.)

    I’ve been low-carb, keto, and vegan. First went vegan/ vegetarian decades back but had been convinced by various practitioners to ‘eat more protein.’You can lose some weight easily enough when first following low-carb, however as you’ve shown over the years, it’s not sustainable.

    While I tried those diets for help with other issues, I thankfully restored a vegan, whole foods, plant-based Macrobiotic diet which emphasizes more whole grains + vegetables, supplementing with pulses, seeds, fruit.

    The ‘magic’ for my recent weight loss ~ now as light as I’ve ever been ~ was stopping being so protein focused. I found it actually improved my energy too.

    High-carb for the win!

  2. Okay, so I've been reading and seeing videos promoting an increase in protein as women age is good for maintaining muscle mass. For these women, what do you suggest?

  3. I'm obese and trying to lose fat (pretty good so far) but I sometimes hit like 80 or even 100g of proteins a day. I'm vegan, does this help?

  4. As a strength-focused athlete, it's very confusing for me to hear this. We're recommended to intake over 100g of protein a day and supplement with BCAA's. Is that ruining my metabolic health? I'm in the gym 4 days a week for 2-3 hours a day and I also do 6 hours a week of mountain hiking so maybe that's offestting the metabolic harm of BCAA's? lol help?

  5. Since frailty is closely associated with death, don't you think we may be missing a piece of the puzzle here? Intakes of upwards of 2.2g/kg of bodyweight per day have been shown to be beneficial for muscle development compared to the 0.5g/kg.

  6. It’s context dependent. If you are lifting weights on a high leucine diet, you will become more insulin sensitive compared to weight training on a low leucine diet. This is because weight lifting on a high leucine diet results in more muscle gain compared to weight lifting on a low leucine diet.

  7. Incomplete picture of just showing protein-restriction (or normal recommended protein intake) lost more weight. DEXA is cheap and easy as a tool to gauge if the weight loss came from fat or lean mass, and should have been included in the study. In addition, DEXA can show if there is any change in visceral fat mass before and after intervention, and another parameter to gauge if metabolic health is improved.

  8. interesting extrapolation ..but soy, lentils, & chick peas also have BCAAs..are you saying it's only the BCAAs from animal protein that's bad?

  9. People older than 50 on a vegetarian diet look like they're about to die. They age horribly.
    But aside from all the emotion in the reporting in this video, which is distracting, the studies are missing data- don't say how many people were in each study, what their age is, their health, the amounts of protein curb fat ratio they were eating in each diet, and whether or not they were doing resistance training. And I'm talking about to failure not walking around the block or sitting on a stationary bike for 45 minutes. Obviously this guy doesn't do it. He's tiny. I bet all the people who lost weight by eating carbs lost muscle mass.
    Did you know that when you fast for a few days your cholesterol can go up?
    Exercise trumps insulin resistance. My body fat goes down incredibly when I am cycling 2 hours/ day or resistance training with heavier weights. Eating animal protein and fat and very few carbs which I burn through during the exercise.
    I'd like to see a study involving athletes and people who do resistance training, to failure, for at least 160 minutes a week on both diets- that would be more beneficial to people.
    Not sit on your couch and stop eating animal protein. Those are the frail old people you see. And just for reference, I am 62 years old and the picture in my profile was taken last week..

  10. I have a good friend that has been vegan for 6 years now and he had done research pointing out that vegan is the healthiest option, but what I just been told a few weeks ago the pointed that you won't get cancer by going vegan!? So slowly I'm heading vegan way finding it a little hard at the moment but I've heard and via social media plus my GP all saying that vegan is the better option for me and my family I wish I listen to my aunty who has been vegan for over 20 years.

  11. Recommending lowering the intake of leucine is a great way to give people sarcopenia. Terrible advice. You'd have to be some sort of crazy vegan activist to… Oh, yeah that's right. Never mind!

  12. As a T1D can confirm do get insulin resistance with BCAA but not if they're low enough 5g of each should be ok, though if every day maybe build up. Aspartic acid is great for short term insulin resistance but in low doses .8-1.6g, but you need to be smart and take it with a pint of water as it'll help your kidneys with urea cycle.

  13. Right on time!
    I was about to increase my protein consumption. It appears that I need not bother. I will start a weightlifting program instead. Thank you Dr. Greger.

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