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Longevity Doctor: The SHOCKING Weight Loss Truth

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Doctors Mary Claire Haver, Vonda Wright, Natalie Crawford and Stacy Sims break down one of the biggest myths in modern wellness - fasting, detox diets and “cleanse” culture.

They reveal what actually happens to your body when you stop eating for long periods, why “juice fasting” doesn’t work, and how eating in rhythm with your body’s natural clock can completely transform your health and energy.

Discover:
• Why fasting affects men and women differently
• The truth about “detoxing” and what your liver actually does
• How fasting can increase inflammation and visceral fat
• The simple eating pattern that boosts energy and longevity
• How to use food timing to improve sleep, focus and recovery

📺 Watch the full episode here - Women's Exercise Debate: The 7 Weight Loss...

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20 Comments

@roadtoscratch3481 11 months ago

Moral of the story, avoid diet trends and eat whole foods sensibly, i.e., eat until you're satisfied NOT until you are full. Eat between sunrise and sunset, then stop eatig. Get plenty of good protein, fats, fiber and vegetables. Minimize the packaged and boxed foods. Cheers.

@andrewhaynes5537 11 months ago

So much contradictory advice on these health topics over many of these recent talks. I feel like I want to put them all in a room and film them arguing their cases.

@thefewwomen 11 months ago

FASTING is incredible. It's amazing how much the body heals when we stop consumption!

@invino1475 11 months ago

I feel like this is literally the exact opposite of other doctor scientist people he’s had on the show

@dort5436 11 months ago

Three day fasting corrected my gut issues. After 6 months of weekly 3 day fasts, I had no more gut problems and had not lost my muscles

@HardwiredMusicMaker 10 months ago

‘Don’t eat when it’s dark’ - lol - it gets dark at 5:30 pm in winter here

@lafayettes72 11 months ago (edited)

Lost 80 lbs in a year through fasting. I've kept it off. I've been overweight my whole life (53 female) and wish I had done this sooner. It's not for everyone, but I question experts who claim it doesn't work when it does. Oh, and I'm Bipolar. I still have to be on my meds, of course, but being healthy helps so much. Thank you, Dr. Pelz. Watch his first interview with her, not the second one. It's not as good. If you have problems with your weight, ease into the 12 hr and start increasing it slowly. Sometimes people jump into a 24-hour fast, and it knocks them down. Work up to it. What do you have to lose? Look up how long a person can go without food. Fascinating. Good luck. ❤ Oh, and I meet my protein. Meal prep. Do your homework.

@arimunz25 11 months ago

As a working mother of 3, I fasted 24 hours for 2 days a week, sometimes 3. I lost 38 kgs within a year. No special diet just stopped eating. Saw the weight drop off but I almost saw that lost too much body fat, so I stopped altogether. Everyones body is different, so it's never a copy and paste for someone else. Listen to your body not to people who think you'd fit in this "box"

@NoOctopuss 11 months ago

Mindy Pelz should have been at this table.

@lloyannehurd 11 months ago

I had exhaustion everyday for years. I never awoke refreshed. I went on a fast for a week of water only, except on the third day. Then I drank the juice of half a grapefruit, half an orange and whole lemon with blackstrap molasses, and five crushed garlic cloves. I may have forgotten some ingredient. I almost threw up. Wow. When the fast ended my fatigue was gone. I have never gotten it back after 36 years.

@BelindaLMoreno 11 months ago

I get it about stop eating when it gets dark. In the winter especially if it's been cloudy, it gets dark at 5pm., people are just getting off work let alone stop eating for the night.

@FoodsthatHeal2025 11 months ago

This episode explains perfectly why most diets fail long term. If your cells and hormones aren’t healthy, the weight always comes back. I’ve been diving deeper into that “longevity first, fat loss second” idea on Foods That Heal — it really changes the game. 🔥

@elainelomax6846 11 months ago

I like to fast from 8pm until lunch time, skipping breakfast everyday. My body is used to it. I like to feel that my body is getting the time to repair and clean up any dead cells floating around. 😊

@techjunky82 11 months ago

11:16 all the glucose you need can be made by your liver through gluconeogenesis.

@swanee22 11 months ago (edited)

Exercising when fasted: the red-haired doctor obviously does not understand how ketones function in fat-adaptation and the role of beta-hydroxybutyrate in feeding muscles and the brain...an energy source which the brain and muscles prefer to glucose. The 3 types of cells that need glucose (red blood cells, a type of cell in the eye, and a type of cell in the kidney) can get all of the glucose they need through the process called denovo-gluconeogenesis, which every body can do. Calling Professor Bikman...please help these people.

@justinbroderick4126 11 months ago

Only talking about extreme fasts and not addressing a much more common 24 hour fast left me wondering why I watched this.

@jphillips8545 11 months ago

16 hour fasting (early dinner late breakfast) makes my body feel clean and maintains a healthy weight.

@LKR-J 11 months ago

Keeping insulin down and ketones above .5 is important for women to reduce breast cancer etc .. so fasting is key period!

@dorotadeli3181 11 months ago

Thank you for inviting Stacy. I love what she does for women 🧡

@KarenBasset 11 months ago

Oh this is the content I need today! Having recently had a serious health event, I need to lose weight and get in better shape, but need to do it in the safest way possible.

I know folks who do juice fasts and cleanses and I want to inform them but people jump on these fads and pseudoscience.