Dietitians Debunk 18 Weight Loss Myths

Dietitians Debunk 18 Weight Loss Myths

Business Insider asked three registered dietitians to debunk 18 of the most common weight loss myths. They explain that you don’t need to purge your diet of fat or carbs to lose weight, skipping meals can backfire, and fad diets like the ketogenic diet don’t often work. Beyond debunking weight loss strategies, they explain that weight loss is not just about discipline. It’s about genetics, access to healthy food, and your relationship to food. 

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Dietitians Debunk 18 Weight Loss Myths


  1. Tom Vobbe on December 27, 2021 at 7:30 pm

    Don’t listen to these fools. They are using outdated info.

  2. Timothy Bell on December 27, 2021 at 7:31 pm

    I don’t think these experts are particularly curious or sceptical. They seem to just fall back on conventional wisdom, which is mostly right, but the operative word there is mostly.

    The first things I studied as an adult were philosophy and communications, I think not enough people in STEM have this expertise, or even respect it, which is how we end up with, say, doctors who actively violate Hippocrate’s oath by overprescribing second generation antipsychotics, just as an example. Like the people in this video they will often fall back on what they learned, failing to consider counter arguments, and failing to be sceptical of research.

    I’m only 110 seconds in, but I can assure you there’s a reason fasting has been so integral to spirituality, those who have properly fasted can attest to the paradoxical effect fasting has; despite depriving your brain and body of fuel you end up feeling like you have the cleanest amphetamine buzz (takes about a day of not eating to kick in). Presumably (read: I don’t know) this is because of our evolution as hunters, when we’ve been on the trail of an animal for days, and haven’t eaten in a while, that’s when our body needs heightened concentration and awareness.

    Maybe they’re just being vague with the concept of "starving yourself for weight loss". I don’t so much see it as something to do with weight loss as I do see it as something to do with spiritual growth and discipline.

    The whole "starvation" mode thing strikes me as embarrassing coming from so called experts. If you don’t eat for three days, and return to a healthy diet (people who do fast for extended periods have to ease back into solid foods gradually, it’s more often the opposite of what these experts say) then from where is your body getting the extra fat and sugar? We’re not plants, we can’t create mass from the CARBon in the atmosphere, we need CARBohydrates for that. While there might be (probably is, it’s not like I reject the information, it just is expressed in a really unsceptical way) some mechanism by which we conserve energy during periods without food, that doesn’t change basic biological facts about how our body uses and stores energy.

  3. Sara S on December 27, 2021 at 7:31 pm

    Lot’s of good tips! Michael Palin’s advice has helped me eat better and lose weight and is easy to remember: "Eat food. Mostly plants. Not too much". Eating real food, not highly processed items with a list of ingredients that I can’t pronounce, has helped me to lose weight and feel better. I don’t count calories. I eat bread (homemade). I have occasional treats. I am not dieting, I’m just eating healthier.

  4. Rodger Bane on December 27, 2021 at 7:31 pm

    Well…… all carbs aren’t created equal are they? Simple, starchy carbs VERY MUCH are your enemy and the poison of refunded sugar is the worst of the worst. Big difference between say Wonder Bread and a carrot.

  5. Always Curious Always Learning new things on December 27, 2021 at 7:32 pm

    Wow I didn’t realize there were that many calories in that olive oil personally I don’t use oils I usually bake everything or if I am frying I just fry the food nothing is added be it vegies or meat. for years I heard about Weightloss and I always say you can have two people same body frame same height and weigh 200 lbs and the person with more fat on their body will look a fair amount larger than the person that has a lot more muscle. also, I noticed now that I am 59 years old I watch what I eat and I exercise daily ( not a lot) I am much heavier and larger than when I was in my 20-30s I think age is a huge factor when I watch all of these people on Youtube talking about diets and working out they are all in her prime when you get older things change the body changes
    that BMI calculator is a total joke years ago It said I was Obese because I was 6’2" and weighed 210lbs I have a large frame also I had mostly muscle and looked a little slim
    now for some reason that I still haven’t figured out as to why I am gaining weight and fat around my belly and chest

  6. Stewart Terry on December 27, 2021 at 7:35 pm

    Huh, two year old video but ignores the last 20 years of weight loss research…

  7. Carl Jhonson on December 27, 2021 at 7:35 pm

    these dieticians are clowns

  8. Ebra Delfino on December 27, 2021 at 7:37 pm

    I disagree with a lot of this things. They are only myths because they are taken out of context.

  9. mrbear1302 on December 27, 2021 at 7:38 pm

    Sorry but a calorie is a calorie. It is the amount of energy it takes to raise one gram of water one degree Celsius! Please stop spewing miss-information!

  10. Аэлита Хуснутдинова on December 27, 2021 at 7:40 pm

    I’m not a dietician or anything, but would like to share my experience, maybe that would be helpful to someone. When I was 17 I went on exchange to the U.S. and gained about 7-8 kilograms in 9-10 months (not sure how much that would be in pounds). I ate lots of sugar there, lots of fast food, and stuff like that, which was different from what I had at home (there my weight was pretty much stable throughout the years). When I came back, it wasn’t my goal to lose weight, but I did when I went vegetarian and I lost even more when I went vegan (closer to the whole-food plant-based one). I still eat cookies, sugar, and occasionally plant-based fast food, but I don’t crave it as much as I did before that. Of course, this is not for everyone and it might require more planning and cooking, if you’re not used to that. But I quickly learned all of that and it helps me keep my body healthy despite all of the stress of work and uni.

  11. Ci Hunter on December 27, 2021 at 7:40 pm

    Myth 12 the keto diet. They mention cholesterol and state that they see patients coming into clinic with weight loss but higher cholesterol markers. This is ten years out of date! You need cholesterol it is not the cause of heart disease. And had they tested the particles of LDL they would have found type A not type B which is the one that will clog up an artery if there is inflammation present. Both inflammation and type B cholesterol are only found in the body when carbohydrates are consumed regularly. So those whole grains and legumes and certain fruit and vegetables she mentioned are not healthy. They are the problem with the cholesterol. And heart disease will continue to form regardless of lowering the LDL. But if you have no inflammation due to removing excess carbs from the diet and therefore your LDL is produced in type A, not type B, then it doesn’t matter how high your cholesterol is you will be healthy!! In fact you will live longer and healthier with high cholesterol than low as long as you make the right LDL particles.

    It is important to remember that when it comes to food recommendations Dietitians only know what they are taught and that follows the legal dietary guidelines. If they want to pass the exams and get hired they cannot deviate from this. However, the lack of up to date knowledge about cholesterol comes from sheer laziness on their part. They get comfortable with what they think they know, and are busy so they do not seek out newer information to update themselves. They also do not like to have to tell patients they have been wrong and given them bad advice for years. So they stick to their guns and keep on confidently telling people absolute piffle about diet and cholesterol that never had any basis in science or had any clinical testing before it was made mainstream legal medical advise.

  12. Bunty Cariappa on December 27, 2021 at 7:41 pm

    Cheap food is causing overheating….. eat less don’t over eat it’s simple

  13. Light being Pontifex on December 27, 2021 at 7:43 pm

    wow these experts are dumb,,, the second girl is fat and the first girl has fatty arms,,,

  14. Wayne Snelling on December 27, 2021 at 7:44 pm

    Skipping meals is healthy for you and a great way to lose weight. This "dietician" is a moron.

  15. devin reed on December 27, 2021 at 7:44 pm

    Calories in, calories out. It’s that simple.

  16. Jack Neumann on December 27, 2021 at 7:47 pm

    Names of these "dietitians"?

  17. Lient ForJuve on December 27, 2021 at 7:48 pm

    This video is outdated. Many doctor, nutritionist and research are told that fasting affect a weight loss. Yes and the end of the day, weight loss need calories deficit. But you can improve metabolism through fasting. With fasting, you fix your Insulin resistance problem that make your metabolism slow down. My wife before fasting need lower than 1200 cal to maintain his weight, now with fasting he consume 1500 cal and still losing weight. Yup fasting/timing your meal is helping you.

  18. Poppy Seed on December 27, 2021 at 7:56 pm

    Gluten free diet will make you lose weight, but not in a healthy way. When I had to cut out gluten for health reasons I lost few kilograms while being underweight already. I felt so sick and tired all the time. Don’t cut it out unless it’s for health reasons

  19. caniskipthis on December 27, 2021 at 7:56 pm

    Myth: bananas are a great source of potassium

  20. Dylan Fletcher on December 27, 2021 at 7:56 pm

    That lady was completely talking out of her ass when it got to diet soda. She doesn’t even understand the mechanism of action of blood sugar and insulin

  21. huntressforhire on December 27, 2021 at 7:56 pm

    Just as we are all unique, we all need different diets. Fasting is not starving and as long as you have the willpower, you won’t over consume. I eat after every 14 to 18 hours and eat healthy. It works and I’m doing incredibly well with it. Dieting did not work for me. Educate yourselves and know your own limits. Think healthy when eating and you won’t gain weight

  22. Lele on December 27, 2021 at 7:57 pm

    Me who has anorexia: *sees the title*
    My brain: “yeah,why not trigger myself”

  23. TheLittleRadicalThinker on December 27, 2021 at 7:59 pm

    These dietitians don’t even realize they are contradicting themselves. Holy cow.

    Myth 1,debunk, don’t skip meals. Skipping even one meal will cause big problems.
    Myth 2, don’t eat calorie dense foods, eat nutrition dense foods
    Myth 3, don’t starve yourself. Your body will go into conservation mode and lower your metabolism.

    How the hell do you lose weight if you have to eat all the time and not skipping meals and always provide enough energy for the body to not burn the fat stored? Do you think the body can burn away your fat if you are always caloric surplus? Not to mention the very thing preventing fat burning is insulin stimulated by carbs.

  24. Henry Drieberg on December 27, 2021 at 7:59 pm

    16:53 So the real enemy of being obese is just history. Your past, your ancestors gene codes, your upbringing and your old habits. Nice…

  25. totorofosho on December 27, 2021 at 8:02 pm

    They are wrong.

  26. Mark E Kar on December 27, 2021 at 8:02 pm

    Do these ppl get paid for doing this? Shame

  27. József Gábor Gál on December 27, 2021 at 8:03 pm

    TBH there is a lot of truthfulness in the video, but experience shows otherwise. Yes, calories are not the same, however, all in all, it comes down to caloric deficit. If you eat less calories than you use, you will lose weight.

  28. Tony Yu on December 27, 2021 at 8:05 pm

    carbs ARE your enemy

  29. 149RNAx98Ribose on December 27, 2021 at 8:06 pm

    Lol im doing keto since 8 months and lost 30 % of my body weight. Lowcarb or zerocarb is possible.. very easily. I havent cheated once as i dont trust myself. Imho it has become a routine to eat keto. And i love cheese, nuts and leafy vegs

  30. Rômulo Pariz Galon on December 27, 2021 at 8:08 pm

    Changing only juice and real coke for diet coke and sugar free juices made me go from 80kg to 70kg alone.

  31. datsuntoyy on December 27, 2021 at 8:09 pm

    These "dieticians" need to get with the 21st century, many of what they call myths are well proven to work, as I stated before in detail which was promptly removed. I’m an example of how very low carb and intermitent fasting works. These people are the CNN of nutrition world.

  32. Prismak on December 27, 2021 at 8:12 pm

    Myth 19: Advises of registered dietitians are the absolute truth in nutrition and backed up by Science.

  33. Shirley Ann on December 27, 2021 at 8:14 pm

    Is that raw chicken they keep putting on the plate?!!!

  34. Tom Vobbe on December 27, 2021 at 8:14 pm

    Lmao bananas are not healthy. They have been artificially engineered to have an unnaturally high amount of sugar. Not much better than eating a cookie. Also they aren’t a great source of potassium, there are many other foods that are high in potassium and not loaded with sugar.

  35. cetin metin on December 27, 2021 at 8:14 pm

    You buy a giant cabbage…
    As you eat the giant cabbage, the cabbage begins to shrink.
    As he continues to eat the cabbage, the giant cabbage shrinks to the size of an apple.
    As you eat cabbage, you lose weight and get smaller in size.
    Just a simple assumption.

  36. dragomxsoldier on December 27, 2021 at 8:15 pm

    I’d this video available in Spanish?

  37. Ray Bod on December 27, 2021 at 8:17 pm

    I don’t skip breakfast, just don’t eat it until I’ve been awake for 6 to 8 hours.

  38. rosi •v• on December 27, 2021 at 8:19 pm

    Why am I getting these videos-YT you know I have an ED

  39. Phil on December 27, 2021 at 8:20 pm

    these dietitcians are luddites… they’re mostly repeating advice from the past 50 years that has proven to be terrible advice

  40. Trystan Smith on December 27, 2021 at 8:20 pm

    11:40 of course they have higher cholesterol because they are consuming more fat. Fat is a much better energy source than sugar and glucose. The Keto diet is basically very low carb not no carb at all. You need carb to fuel your brain but very little. You get that carb from vegetables like leafy greens.

  41. Megan E. on December 27, 2021 at 8:21 pm

    I think food allergy tests are important for weight loss. Not the scratch test that shows anaphylaxis, but a blood test that shows what your body doesn’t like. I’m allergic to eggs and dairy. A couple years ago I cut both out and lost 20lbs, while not exercising or eating healthy. I’m currently dairy free and I’m consistently losing weight and don’t feel nearly as bloated, my bowels are healthier, and my pain went down b/c inflammation went down (cutting out eggs and dairy was hard, so I just focused on dairy free). My theory is a lot of overweight people have undiagnosed food allergies that cause their gut to be unhealthy, which leads to weight gain, lethargy, and body aches.

  42. JellyJonesey on December 27, 2021 at 8:21 pm

    How to lose weight in 1 easy step:
    1. Calories In < Calories Out
    Nice and simple thermodynamics.
    Everybody CAN lose weight, the amount of effort required is just different between different people. If you’re using more calories than you’re consuming you WILL lose weight, its as simple as that. Its all a balance of keeping both sides of the equation valid and it doesn’t end once you reach your desired weight.

  43. Net C. on December 27, 2021 at 8:23 pm

    So when we were evolving and eating 50000 years ago our ancestors ate 3 meals and 3 snacks a day. They didnt have any muscles when they didnt get their 6 meals a day.They also ate bananas year round when they had a sugar craving. They also ate a healthy amount of carbs like apples, cucumber, bread, and kale year round because winter didint exist. Good to know.

  44. susan fudge on December 27, 2021 at 8:23 pm

    The only way I have ever been able to control my weight. One meal a day DOES work.
    And low carb helps all my autoimmune issue. Nutritionists had me gaining weight and raising my blood sugar.

  45. Account 1709 on December 27, 2021 at 8:24 pm

    Intermittent fasting is NOT the same thing as skipping meals.

    Skipping meals: No breakfast. Meal 1 around noon. Meal 2 in the evening. Maybe some snacks. That’s skipping breakfast.
    Intermittent fasting: Meal 1 ("Breakfast") at 12:00. Meal 2 ("Lunch") at 3:30. Meal 3 ("dinner") at 7:30.

    You still have 3 full meals and eat as much as you would if not intermittent fasting.You’re just consuming them in a shorter time frame.

  46. The Underground on December 27, 2021 at 8:25 pm

    Carbs is in fact a huge problem assuming we’re not talking about cellulose or fiber. You’re wrong about categorizing rice and apples as well as bread along side what cannot be metabolized. And btw it’s calledf NAFL disease. You missed a word. Diet sodas are bad due to what they break down into. Once again you should know that. Formaldehyde and then to formic acid. Fructose is horrible in far more ways than you mentioned. It’s analagous to say stay away from alcohol because you might get a hang over. Really? That’s the thing you isolate? Not heart disease, fat accumulatio, increase in uric acid etc. – and yes that’s fruit. In regards to alcohol just remember your liver will prioritize metabolizing alcohol first above all meaning there will be a backlog of calories waiting to burn. You wanna be healthy? Relatively low carb, lean protein with every meal and veggies at least once a day. Fats are great – think eggs. Control portions and exercise. Ladies hit the weights don’t just do cardio. And men, remember cardio – and don’t forget compound exercises in between at home and don’t you dare skip leg day lmao.

  47. Hael Otny on December 27, 2021 at 8:25 pm

    Nikita’s handwriting…

  48. Poppy Seed on December 27, 2021 at 8:27 pm

    Just cut out added sugar. You’ll be surprised how much healthier you can eat

  49. Hornet King on December 27, 2021 at 8:28 pm

    This is a prime example showing how little mainstream "dieticians" know about how the body uses nutrients.
    For doctors who really know health based in natural foods and fasting, check out Dr Jason Fung, and Dr Sten Ekberg.
    Don’t waste your time on this mainstream diet, sick care, car wreck.