Intermittent Fasting & Your Thyroid Health – Do Fasting for Thyroid Problems – Dr.Berg

25 November 2025


Intermittent Fasting & Your Thyroid Health – Do Fasting for Thyroid Problems – Dr.Berg



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Is intermittent fasting good for your thyroid? Here’s what you need to know.

Timestamps
0:00 Intermittent fasting and your thyroid
0:10 Can you do intermittent fasting?
1:24 Tips for intermittent fasting and thyroid health
3:18 How intermittent fasting supports a healthy thyroid

In this video, we’re going to talk about intermittent fasting and your thyroid.

Data shows that going on a low-calorie diet can cause thyroid issues. Intermittent fasting doesn’t limit your calories. Intermittent fasting is about eliminating snacks and small meals throughout the day. Instead, you want to have 1-2 large meals within a short timeframe.

There are a couple of things I want to highlight. First, you need to get plenty of selenium in your diet if you have a hypothyroid situation. Selenium is one of the primary thyroid-supporting nutrients.

Next, I want to mention that the best natural source of iodine is sea kelp. You want Icelandic sea kelp is an incredible nutrient-dense supplement.

Additionally, cruciferous vegetables may cause problems in someone who has thyroid issues. Adding more sea kelp may help negate some of those effects.

Vitamin A and D are also crucial for supporting a healthy thyroid.

Finally, I want to remind you that intermittent fasting—if done correctly—can support a healthy thyroid by boosting the conversion of T4 to T3.

In summary, if you’re doing intermittent fasting correctly, it shouldn’t cause more thyroid issues. In fact, it can help support a healthy thyroid.

Dr. Eric Berg DC Bio:
Dr. Berg, age 57, is a chiropractor who specializes in Healthy Ketosis & Intermittent Fasting. He is the author of the best-selling book The Healthy Keto Plan, and is the Director of Dr. Berg Nutritionals. He no longer practices, but focuses on health education through social media.

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Disclaimer:
Dr. Eric Berg received his Doctor of Chiropractic degree from Palmer College of Chiropractic in 1988. His use of “doctor” or “Dr.” in relation to himself solely refers to that degree. Dr. Berg is a licensed chiropractor in Virginia, California, and Louisiana, but he no longer practices chiropractic in any state and does not see patients so he can focus on educating people as a full time activity, yet he maintains an active license. This video is for general informational purposes only. It should not be used to self-diagnose and it is not a substitute for a medical exam, cure, treatment, diagnosis, and prescription or recommendation. It does not create a doctor-patient relationship between Dr. Berg and you. You should not make any change in your health regimen or diet before first consulting a physician and obtaining a medical exam, diagnosis, and recommendation. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition.

#keto #ketodiet #weightloss #ketosis

Thanks for watching. I hope this helped explain why intermittent fasting helps support a healthy thyroid gland. I’ll see you in the next video.

hey guys in this video I want to talk about intermittent fasting and your thyroid I get this question a lot people are concerned they're hypothyroid some of them have hosoo some of them are just regular hypothyroid and they're like can I do intermittent fasting okay well here's the data what really uh messes up the thyroid is if you go low calories a low calorie diet now the difference between intermittent fasting and a low calorie diet is that it's really it's simple it's like intermittent fasting you're still having the same amount of calories you're just consuming them not as frequent you're not spreading them out through the day okay so as long as you're having a nutrient-dense meal with all of the nutrition that you need you're going to be fine but if you're doing um a low calorie diet that can be very stressful on the thyroid because because the thyroid is already suffering with a um with the body's ability to make intracellular enzymes and work correctly and uh metabolize things so you don't want to literally put it in Starvation starvation or low calorie diets put signals into the brain that um you need to slow the metabolism down even more so in other words the way to create a slow metabolism is to go on a diet lower your calories starve yourself and then your system slows down so if we take a hypothyroid case and we do the same thing so now we take this slow metabolism now we really make it slow okay not a good situation couple things you should know number one selenium is the key Trace mineral to help you convert from T4 to T3 it's very important hashimotos and um you can get it in bruise yeast or nutritional yeast okay that's a good good natural source or take it as a supplement iodine get it from celp I have one called Icelandic celp which has also selenium in it both of these it's a trace mineral it's not synthetic it's plant-based um I also have a plant-based Trace mineral but if you want more of the iodine you want to do more seelp for thyroid it's it's you don't need much maybe one or two in the morning don't have before you go to bed because you're going it's going to keep you up um now as far as cruciferous vegetables it could be a factor uh in slowing your thyroid down especially if you consume a lot of them but what I like to do because one of the causes of thyroid in the first place is high levels of estrogen how you going to get that out of your body so you want to consume cruciferous to kind of because it's anti-estrogenic to help clean some of that out so if you're if you're a true uh and you're concerned just have just small amounts of cruciferous just to make sure okay and then up your seelp and you'll be fine the other um unknown nutrient that's vital for uh improving Hashimoto especially is the fat cable vit vitamin A and vitamin D but mainly vitamin A vitamin A has a unique uh ability to go into the the Deep Cell and affect the DNA so it's really helpful and vitamin A is um you can get it in CER oil so CER oil ver virgin cive oil is a combination of vitamin A and vitamin D together so I'd highly recommend that uh if you have a thyroid issue and also just to support it through intermittent fasting and lastly intermittent fasting itself if done correctly can help you convert T4 to T3 the active form of thyroid hormone so it will improve the thyroid I think the reason it does it mainly is because the gallbladder um helps you convert T4 to T3 and inent fasting greatly improves the gallbladder conversion okay all right so those are some tips and thank you so much for watching hi guys Hey listen I created a pretty amazing evaluation quiz down below that actually analyzes your symptoms to find the cause the root cause of all of your symptoms the most likely cause so so take the quiz now and we'll send you a report

#Intermittent #Fasting #Thyroid #Health #Fasting #Thyroid #Problems #Dr.Berg

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47 Comments
  1. Dr Berg does this apply is i had my thyroid removed?

  2. High estrogen causes hypothyroidism? So why is it that it occurs so prevalently in menopausal women? This is a contradiction.

  3. I have hypothyroidism. I was doing 24 hour fasting. Everything was going good. I was feeling good but, By day 4, mid day I felt like I was going to pass out. So by hour 20 I started eating to feel better. So then I came across this video.

  4. I have hypothyroidism,and have always been under the impression that I shouldn't do IF.

  5. What though if you desperately need to lose weight? Don't you have to reduce your calories in order to lose weight?

  6. Dear Dr Berg, is it fine to take Thyroid medication 6am and food 2pm and 8pm.

  7. But Dr berg you didn’t address how many calories to eat

  8. The relationship between the pituitary, hypothalamus & thyroid wasn't discussed.

  9. Thank you Dr.Berg for another informative video. Will definitely start intermittent fasting, before watching this video i was worried that it would worsen my hypothyroid symptoms now that I know it will do me good will definitely start. 😊

  10. I have hypothyroidism and no gallbladder anymore 😢

  11. I fast with underactive thyroid iv lost 3 stone but I eat tuna and steak with some brazil nuts or other meat I stay away from carbs I weight lift and do ten thousand steps a day my body has transformed with muscle I'm so proud of my self 😊

  12. What if I don’t have a gallbladder and I have hypothyroidism is intermittent fasting going to work in that case?

  13. I don't have a thyroid l. i take 200 mcg of Synthroid. will healthier liver and other absorb nutrients mean i could lower this hormone? do i need Iodine?

  14. hi..will the liquid drops of Iodine work well?..or should we only use Kelp?

  15. I’m 40 hrs in on a 72 hr Fast. Feeling GREAT!

  16. I do not know where to begin. Amounts of selenium/ iodine etc.

  17. I have hypothyroidism and hashimoto's. I think I'm going to start IF, I am trying to lose weight, so I'll do 16:8.

  18. Dr Berg, does this work on thyroid nodules? My t4 and tsh is normal, thyroid function is normal, both thyroids are of the same size but I do have tirads 3 bilateral nodules. Can you tell me if selenium, iodine, zinc, vit a and d3 work?

  19. My mom is suffering from thick tongue like white stuff built up, same in throat, difficulty in swallowing food, poor oral health, lost taste bud, 😢 does fasting help with it ? And what's the proper treatment for would you please like to concerned it ?

  20. When i eat thyroid tablet i eat 100 mg thyronorm.? Plzz reply

  21. What is the best time for intermittent fasting for a female with hashimotos. What time to what time

  22. Very helpful. God bless you

  23. What about prolonged fasting such as eating every other day or 3 day dry fasts?

  24. How to loose weight in hypo thyroid? plz any one guid me

  25. I was diagnosed with hypothyroidism while pregnant and was taking a low dose of synthroid. After I gave birth my doctor moved and I’m not sure if I should be still taking it. I heard it kills your thyroid. Please help! Should I go back to the dr and get prescribed synthroid again or should I take these things and intermittent fast. I feel at a loss. Please please respond

  26. Does this information apply to morbus basedow as well?

  27. What can you use instead of sea kelp? I have a Shellfish allergy & kelp isnt recommended

  28. Be careful with iodine. It helped me for short term but it’s not good to take as a supplement too much it did more harm than good for me

  29. So do hypothyroid symptoms decrease after menopause and estrogen levels drop?

  30. Can I take my thyroid medication while fasting? Will it break my fast?

  31. How about for hyperthyroidism Graves Diseases?

  32. Unfortunately I no longer have a gall bladder. How would this affect my T4

  33. Dr Berg, please do a video on IF and Hyperthyroidism. Thank you!

  34. If you have thyroid issues, does that mean you can't do 3 day Water Fast ?

  35. Plz answer me . can i do omad with my thyroid condition … Can i take medicine in the morning and eat my dinner at night in omad

  36. But.. Living on ketones is not starving, and Hypothyroidism is a lifestyles symptom. So when im waterfasting im not doing the bad things i did incl stress. Im taking it easy, sleeping a lot.

  37. If you can’t go a bit low (not too restrictive )calorie how can we lose weight?

  38. For women with hypothyroidism, intermittent fasting should not be longer than 12 hrs (MAX 14) and rather 5 small meals per day. I did intermittent fasting for 5 yrs and my thyroid has been messed up allt he time …..leading to gluten intolerancy, low stomach acid, b12 and b7 deficiencies…this despite of taking these as supplements. Constant flus and low immune system…weight gain…despite of working out and eating healthy…to name some of the side effects.

    I did lose weight 5 yrs ago, thats why I kept going and felt better. But now, no.
    Also there is a study in which, male mice T3 and t4 production was balanved during intermittent fasting…whereas for female mice the production went down.

    Women have a cycle and hormonal production is differnt then men.

  39. What about hyperthyroid and Graves Disease?

  40. You're a life saver Dr. Berg

  41. Hi Dr Berg. I have been suffering goiter for as long as I can remember. Thank you for your videos on thyroid problem. It really helps a lot.

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