Articles, Blog

Are Avocados Healthy?

August 26, 2019

[Music] in my last video about avocados I described the anti-inflammatory effects and cholesterol and triglyceride lowering effects but what about that video I did years ago about the chromosome damaging effects in a petri dish that all goes back to 1975 when a pesticide naturally produced by the avocado tree was discovered I thought to explain why lactating livestock suffered mammary gland damage nibbling on the leaves the toxin was named person also found to be damaging to the heart which is why you should never feed avocado to your pet birds but hey if it attacks mammary cells in animals might it attack breast cancer cells in humans it did seem to have the same kind of cell cytoskeleton clumping effect in vitro that chemotherapy can have demonstrating potent cell growth stopping and killing effects of the novel plant toxin among various lines of human breast cancer cells so they’re thinking about how might one day be used as chemo itself but here I am thinking holy guacamole Batman please tell me it doesn’t have toxic effects on normal cells – in 2010 we got an answer an evaluation of the genotoxicity the toxicity to our chromosomes of avocado extracts on human white blood cells in a petri dish normally less than 10% of our dividing cells have any chromosome abnormalities but drip some avocado fruit extracts on them and up to half come out defective in some way they conclude that there’s something in avocado fruit that can potentially induce significant genomic instability and some genetic damage in human white blood cells in a petri dish if the same effect occurs in actual people it could for example result in transforming cells into cancer that’s a big if though these were blood cells you don’t inject guac into the vein thing to get into our bloodstream to first have to survive our stomach acid get absorbed through our intestines and then sneak past our livers detoxification enzymes and indeed person may be affected changed by acidic conditions and so given all the differences between what happens in a petri dish and a person it’s essential to carry out further studies before making a final remark about its toxicity okay but what do you do before these studies come out I was concerned enough i provisionally moved it from a stuff your face green light food to a moderate your intake yellow light food until we knew more to err on the side of caution even if person was utterly destroyed by stomach acid what about oral cancer at high enough concentrations avocado extract can harm the growth of the kinds of cells that line our mouths yeah but this is in a petri dish where the avocado is coming in direct contact with the cells but that’s kind of what happens in your mouth when you eat it but it harms oral cancer cells even more here’s a bunch of oral cancer cells those red dots are the mitochondria the power plants of the cells fueling cancer growth extinguished by the avocado extract but since it does there’s more to cancerous than normal cells that they end up concluding avocados may end up preventing cancer what about the esophagus which lies between the mouth and the stomach they similarly found that an avocado fruit extract appeared to inhibit cancer cell growth more than normal cell growth when it came to colon cancer cells or esophageal cancer cells but rather than comparing the effects to normal colon and esophagus cells they compared to a type of blood cell which again has limited relevance in a petri dish study of something you eat this study was pretty exciting though it looked at peak rustle which is a uremic toxin may also be toxic to the liver has been found associated with autism and it comes from eating high-protein diets where is v more plant-based that diet the only source of prebiotics like fiber and resistance starts your love go down see fermentation of carbohydrates in the colon like fiber is considered beneficial whereas fermentation of protein which is called putrefaction is considered detrimental so you switch people to a high protein diet and within days the excess protein putrifying in their gut leads to an increase in ammonia as well as P cresol in fact a doubling of levels within a week but might phytonutrient rich plant foods like apples cranberries grapes or avocados protect the cells lining our colon from the deleterious effects of peak rustle in terms of cell viability mitochondrial function and epithelial integrity meaning like protection against gut leakiness here’s that data on barrier function integrity damaged by peak Kressel but rescued by all the cranberry avocado grape and apple extracts the mitochondrial function was only improved by the cranberries and avocados and they’re also the only ones that appeared to prevent the deleterious effect a peak rustle on : cell viability but bottom line avocados appearing to have beneficial effects on coal-mining cells so that’s a good sign okay but enough of these in vitro studies already yes an avocado extract can inhibit cancer cell growth in a petri dish but unless you’re doing some unspeakable things to that avocado like guacamole with benefits there’s no way that the avocado is going to come in direct contact with your prostate cells so what does this study mean that’s why I was so excited to see this study the first actually look for a link between avocado consumption actual human beings eating avocados and prostate cancer so two avocado eaters have more cancer risk or less cancer risk we’ll find out right now men who ate the most avocado more than about 1/3 of an avocado a day reduced their risk of prostate cancer in fact less than half the odds so with the data on improved artery function lower cholesterol and if anything an association we’ve decreased cancer risk I’d suggest moving it back into the green zone [Music] you


  • Reply TestingU 4Research November 2, 2017 at 11:30 pm

    Legit info or Confirmation bias? Dr. Greger presents some good info some of the time, but this video is obviously biased. Hard to trust the information with his rooting for avocados the whole time.

  • Reply los1wochos November 3, 2017 at 5:27 pm

    Very good, and funny video.

  • Reply crazywaffleking November 5, 2017 at 6:07 pm

    This is good news because I love the taste of avocados.

  • Reply Kodey Graeff November 5, 2017 at 6:58 pm

    Hey doc 🙂 been vegan for six months and ive reduced my total cholesterol by 100 points. This lifestyle is a miracle

  • Reply Rebecca Marchand-Smith November 9, 2017 at 3:21 pm

    LMAO "Guacomole with benefits"!!!

  • Reply Teo Marculescu November 12, 2017 at 8:40 am

    Good news! Keep loving the avocado!

  • Reply turmeric 16 November 13, 2017 at 6:53 am

    I really fun with this guy 😁

  • Reply Julio Obregón November 13, 2017 at 4:52 pm


  • Reply PraxeoIogy November 13, 2017 at 7:28 pm


  • Reply Carol Kihm November 14, 2017 at 9:03 pm

    Dr. Greger, can you comment on this study? Avocotin B lipid in avocados can induce selective leukemia cell death:

  • Reply mmaya November 16, 2017 at 5:44 pm

    Yassssss I was being worried about avocados for a while not eating them too much but now I'm going to be eating more

  • Reply Griffon Dahrk November 17, 2017 at 8:25 pm

    They go great everywhere mayo once went.

  • Reply FIGHTFANNERD9.I'm Gay for Moonbin November 17, 2017 at 9:31 pm

    that's all my dad eats but he still got prostate cancer…….. it will not stop it at all

  • Reply Jason Lieberman November 19, 2017 at 3:17 pm

    I was awaiting this avocado verdict more eagerly than America was awaiting the OJ verdict in the 90s.

  • Reply alex tomlin November 23, 2017 at 3:45 am

    Why does Dr. Caldwell Esselstyne recommend people avoid them then?

  • Reply R November 23, 2017 at 6:47 pm

    Your pretentious accent is so annoying. Please stop.
    Talk like a normal person.

  • Reply Robby R November 25, 2017 at 6:07 am


  • Reply Lizz Lizzie November 26, 2017 at 4:15 am

    so is avacado healthy? this video is so slow. sorry

  • Reply Shanika Weerasundara December 3, 2017 at 12:33 am

    I'm crazy about how the doc says these complex facts..

  • Reply Todd Garber December 17, 2017 at 5:17 am

    Lol!!! Avocado with benefits 🙂

  • Reply MrMasterDebate December 21, 2017 at 12:48 am

    wait….im not suppose to inject avocados into my veins …. ? Shit

  • Reply MrMasterDebate December 21, 2017 at 1:01 am

    Dont judge my sexual love for avocados

  • Reply John Kimble December 29, 2017 at 4:05 pm

    Hurrah for avocados!

  • Reply Tom L December 30, 2017 at 2:51 am

    YaY!!! I love avocados and will eat them more than ever!

  • Reply Tom Elliott January 15, 2018 at 7:41 pm

    Thank heavens… Avos are may fav

  • Reply January 26, 2018 at 3:06 am

    All of the avocados that I eat, this is great news. I have heard that is one of the most nutrient-rich foods on the planet. This video just confirms that it is a good practice to eat them regularly. Thanks.

  • Reply Hulagu Kahn January 27, 2018 at 4:13 am


  • Reply SashaXXY February 3, 2018 at 1:07 am

    Awesome! Thank you!

  • Reply Kilian Treminio February 4, 2018 at 3:21 pm

    Looks like Avos back on the menu boys! 😎

  • Reply huskyfluffy February 10, 2018 at 12:45 am

    I'm so add. Can I eat every day or not?? I'll watch whole thing, but I want to know, now! 😁 I have acid reflux.

  • Reply Rico Garcia February 10, 2018 at 11:47 pm

    What about eating the seeds?

  • Reply Terry H. February 11, 2018 at 3:09 am

    mitochondria is the powerhouse of the cell

  • Reply soup2nuts1 February 14, 2018 at 10:11 pm


  • Reply Donkey Time February 15, 2018 at 5:21 am

    Good because I eat 1 or 2 avocados a day

  • Reply Geocaching Adam February 27, 2018 at 2:16 pm

    This is good news. I love avocados <3

  • Reply Christina Lugo March 1, 2018 at 1:24 am

    your fun videos make me chuckle, thank you for the information, it's game changing!

  • Reply Roberto Scott March 24, 2018 at 2:06 pm

    As the talk was going i thought you were going to ban avocados. So relieved you Went to Green light.

  • Reply Lizzie Clay April 4, 2018 at 11:38 pm

    Thank you so much Doctor.

  • Reply Altie Campbell April 11, 2018 at 1:29 am

    should we be eating the seed?

  • Reply Moltas Lahpsy April 28, 2018 at 11:06 am

    Is avocado oil good for you or should it be avoided? Thanks!

  • Reply MartinezRE1 May 17, 2018 at 10:16 am

    Please don’t take avocados away from me , 😢

  • Reply Joel Austin May 22, 2018 at 1:14 pm

    Is it possible that a video be done on Avocado Oil. Many videos done on all other types of oil, but I have found none dealing with Avocado Oil. Thanks.

  • Reply Harold jitschak Bueno de mesquita May 22, 2018 at 2:16 pm

    Why would Pritkin had avocado on his NO lst as far as I am aware off?

  • Reply destinyal Ifill June 2, 2018 at 4:55 pm

    We grew up on avocados, coconut. Golden apples, fruits et . growing up we never knew what sickness was. We ate pork and pork fat fried with salt, beef mutton, lamb, we drank home made lemonade, with limes and lemons. Passion fruit juice from the tree, gauvers. Home made jellies and jams. Now we see so much sick people now that we started import foods. O btw real cabbage had worms in them. No fruit or veg look. Identical or clone.. We are killing ourselves. By eating produce, produced in factories every thing is made in China who health regulations are completely different to the outer world.

  • Reply Alchemist-A June 15, 2018 at 10:26 pm

    You didn't mention who is financing these favorable studies! Is the Avocado Board involved directly or indirectly?

  • Reply Bonnie Mullen June 17, 2018 at 4:27 pm

    Excellent I have been eating them for years! With very good results to health!! One of my favorite foods!!🥑🥑🥑🥑🥑🥑😋

  • Reply Lisa L Menard June 24, 2018 at 12:03 am

    Thank you. This is great information.

  • Reply char ly June 24, 2018 at 1:19 pm

    Nice to see this , i eat 2 avocados per day

  • Reply thomas mcleod July 11, 2018 at 6:41 am

    The study that showed avocado lowering cholesterol, also stated it was in the absence of meat which by itself lowers cholesterol. First paragraph of the study says it lowers, everyone goes with that, not so much??? There was no meat consumed in the study!!!!!!

  • Reply Patrick Palmarella July 13, 2018 at 9:30 am

    Yes they are… but in moderation

  • Reply H.S. Darke July 20, 2018 at 12:34 am

    "Avocados with benefits." Lol

  • Reply evelyn baron July 27, 2018 at 11:34 pm

    Oy vey. I love avocados …must listen once again and take notes.

  • Reply The Anti Reaper July 30, 2018 at 5:43 am

    Oh good, I probably eat on average an avocado a day.

  • Reply Christine Navarro July 30, 2018 at 11:12 am

    Why do you think they're shaped the way they are? Think it was an accident? 😁

  • Reply TheMatron'sMilitia August 2, 2018 at 10:54 pm

    What about Omega-3/Omega-6 balance?

  • Reply teakey August 18, 2018 at 7:51 am

    Horrible title

  • Reply John Webb August 19, 2018 at 3:38 am

    "We'll find out… right now." Haha, brilliant.

  • Reply Kamala Specht August 26, 2018 at 5:20 pm

    I'm exhausted! Good, not Good!  Not Good, Good.  Yikes.  Thank you, Dr. Greger.  Just watched your vid on coconut….And nutritional yeast….I'll keep trying to get it right!!!!

  • Reply Matthew Rodriguez August 28, 2018 at 5:49 am

    You're hilarious man

  • Reply Just Call Me Bookworm August 28, 2018 at 9:59 am


  • Reply richard smoker September 4, 2018 at 3:21 am

    This video was a scary rollercoaster ride with a happy ending.

  • Reply Blank Space September 17, 2018 at 9:33 pm

    I just stumbled randomly across the old avocado video about the natural toxin it has.. I'm so happy this was recommended right after. I'm back to eating avocados again, not that I ever stoped lol I was worried there for a second

  • Reply Van Allen September 22, 2018 at 2:33 pm

    I tried using an avocado once to support prostate health but… it didn't fit…

  • Reply GreenGretel September 30, 2018 at 7:13 am

    Congratulations! With this video, you've managed to retain the Millennial cohort of your viewers, Dr. Greger.

  • Reply Jeremy Nicholes October 2, 2018 at 7:17 am

    I would love to see Dr. Gregger’s analysis of avocado oil for cooking and baking.

  • Reply Spicy Artisan Hipster Salami October 3, 2018 at 7:15 am

    Well that’s good, since I literally ate a half avocado for breakfast just before watching this (with tomatoes, garlic, a little salt and a tablespoon of vinegar. Guacamole, I had guacamole for breakfast)

  • Reply Frank Martinez October 3, 2018 at 11:26 am

    Thank you I eat one a day.

  • Reply Reece Richards October 10, 2018 at 8:58 am

    Men who eat avocado are probably more likely to eat more vegetables too. Did the men who were tested have similar lifestyles?

  • Reply insight thgisni October 16, 2018 at 11:58 pm

    It just occurred to me that Hispanics also eat lots of avocados as well as beans (just saw your video on beans and Hispanics). Interesting, given the high meat and animal product consumption and high health risks.

    Note I didn't give anything away, keep the suspense!

  • Reply insight thgisni October 17, 2018 at 12:01 am

    Watching Dr. GREGOR nutritionfacts videos and reading comments is more entertaining than TV.

  • Reply Sheldon Stewart October 22, 2018 at 2:43 pm

    I put off watching this video for a long time. Don't scare me like that you cruel cruel man.

  • Reply Extraterrestrial Horse From Uranus October 25, 2018 at 9:54 pm

    "Holy Guacamole, Batman!"

  • Reply Arctic November 11, 2018 at 10:32 am

    Hhhhhhhhh hhhhhhhhh hhhhhhhhh your funny doc

  • Reply FITNESS DELIVERED November 25, 2018 at 12:01 pm

    It makes the best substitute for mayo! I

  • Reply Gigi D December 14, 2018 at 3:35 am

    what about women?

  • Reply Davina December 15, 2018 at 11:39 pm

    omg just say it.

  • Reply Super terrific R December 20, 2018 at 1:29 pm

    Avocados are pretty high in saturated fat so I am surprised you didn’t mention that like you did with coconuts

  • Reply SYN30STM December 27, 2018 at 4:14 am

    He got me lol we will find out…. right now… Haha I thought I was going to have to watch another video.

  • Reply Arthur O. January 4, 2019 at 12:03 pm

    How about pregnant women? Should they eat avocados regularly (2x-3x per week)?

  • Reply Backinto Balance January 10, 2019 at 3:29 pm

    You’ve not idea of what’s healthy buddy

  • Reply Backinto Balance January 10, 2019 at 3:34 pm

    Everyone is biochemical different and reacts differently to food. “One man’s meat is another’s poison” So you’ve got to apply common sense to these idiotic doctors making YouTube videos. Be an individual as you are.

  • Reply IAM REAL January 12, 2019 at 7:52 pm

    Still very high in fat, so if losing weight, dont overdo this great, HEALTHY food. Dr. Greger says 1/4 to 1/2 avocado a day.

  • Reply Sascha Thinius January 15, 2019 at 8:38 am

    tnx Doc, that you read all that med texts for us… i could but it would drive me nuts… thank you for the service

  • Reply Tom Berkholtz January 18, 2019 at 10:30 pm

    Why does Neal Bernard recommend against avocados?

  • Reply Troy Bent January 26, 2019 at 11:38 am

    it supports stronger erections.

  • Reply Wiolant SunGazer January 30, 2019 at 9:19 am

    All I understood @ 6:42

    its enough for me it's in the green zone and I just spent 6min41 sec waiting for that green zone 😀

    What about the theory where if you eat "fatty" avocado and take b12 and other vitamins and nutrients/phytochemicals .. Just like beans+sprouts work like a great combo or Aragula+steamed kale …. Hmmmmmm

  • Reply Playground dolls February 11, 2019 at 11:18 pm

    I am so confused now. All my life I heard that avocado soft part is most healthy food in world BUT skin and bones is so toxic that can't be touched even(wash hands). Is it so?
    Suddenly nobody talk about it anymore and even eat bone.
    Was I dreaming?

  • Reply Clarice Eneadrawings February 13, 2019 at 8:09 am

    Aw yeah!

  • Reply Joderconelusername22 February 13, 2019 at 8:50 am

    Guacamole with benefits!! 🤣🤣🤣

  • Reply Janaina Monteiro February 17, 2019 at 11:12 pm

    Would you be able to comment and share some knowledge about the avocado seeds that are in trend as healthy too ? Sincerely appreciate and admire your work.

  • Reply SpazzyMcGee1337 March 2, 2019 at 11:57 pm

    "You don't just inject guac into the vein". Hehe, yeah, that would be crazy…

  • Reply Ramesh Raghothama March 18, 2019 at 3:17 am

    Guacamole is only 50% Avocado , among other things it has raw onions, cilantro, lime juice and maybe even tomatillos/tomatoes etc. So Guacamole is not isocaloric with Avocado as its 50% low fat , antioxidant rich additives. Of Course digestion supposedly destroys a lot of polyphenol antioxidants.

  • Reply It's Wednesday, Screw Ironing March 26, 2019 at 8:28 pm

    I wonder if he teases his children this mercilessly?😅 I bet he does, smug jerk…🙄😏

  • Reply Whole Food Plant Based Mama May 5, 2019 at 1:35 pm

    But surely men who eat avocado have differentbeating patterns to men who don’t. They probably eat more vegetables too

  • Reply Tama Doucoure May 13, 2019 at 5:31 pm

    I believe you

  • Reply JAffacakeSON BLAHA May 14, 2019 at 8:14 am

    Regardless of being toxic. Still better to eat healthy fat than not

  • Reply irisking100 May 31, 2019 at 2:06 pm

    hey all, can you help me summarize whether avocado is good for us to reduce cancer or bad for us causing cancer? i’m confused

  • Reply Jeanne Amato June 6, 2019 at 12:15 am

    The more I watch this man the more excited I get about a plant based way of eating!

  • Reply Brian Richards July 1, 2019 at 12:39 am

    I'm a lot more concerned about the high fat content of avocados than anything else. Moderation is appropriate for me.

  • Reply The DJ July 30, 2019 at 2:55 pm

    Oof. Carnivores believe they are helping their gut and autoimmune issues XD

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