How to Lose 1 Pound of Fat per Day (20,000 Calories in 5 Days)

Check out this fascinating interview with Dr. Ian Lake and find out how he burned over 25,000 calories in 5 days!

Check out Dr. Ian's Website:

0:00 Welcome, Dr. Ian Lake!
1:13 Should people with type 1 diabetes go 5 days without food?
3:10 What is the difference between type 1 and type 2 diabetes?
5:23 Type 1 diabetes and ketosis
15:01 Ketoacidosis
19:35 Exercise while fasting
22:30 Measuring ketones
29:15 Dr. Lake’s diet

Please join me in welcoming Dr. Ian Lake! Dr. Lake is a medical doctor and type 1 diabetic who ran 5 marathons while fasting for 5 days. He ran a total of 100 miles in 5 days! Dr. Lake's main goal was to show how nutritional ketosis can be safe for type 1 diabetics.

Keep in mind that to accomplish this dangerous and amazing feat, Dr. Lake trained his body in many different ways. Taking something like this lightly could have been deadly.

A type 1 diabetic can not produce insulin in enough volume to maintain blood sugar. This is very different from type 2 diabetes. People with type 2 diabetes have more than enough insulin and often have too much, leading to insulin resistance.

Dr. Lake explains that our bodies can multifuel, which means we can use sugars and fats for energy. In an ideal situation, our bodies can flip between whatever fuel they need. To burn fat as fuel, your insulin has to be low.

Dr. Lake lost over a pound of fat per day during his 5-day fast. To prepare for a longer fast, you have to become fat-adapted. You must lower insulin to adapt your body to running on fat fuel. To lower insulin, lower the food that stimulates insulin—carbohydrates.

Diabetic ketoacidosis is a dangerous condition associated with type 1 diabetes. Ketoacidosis occurs when sugar in the blood can not get inside of the cells, starving them of energy. Some medical professionals believe that ketosis can put you at risk for ketoacidosis, but other doctors are against this idea.

Dr. Lake currently follows the keto diet, leaning more towards the carnivore diet. His diet consists of about 100 grams of protein per day, dairy, and some leafy greens.

Eric Berg DC Bio:
Dr. Berg, age 58, 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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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, 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 #ketolifestyle

Thanks for watching! I hope you enjoyed this interview and that it helps increase your awareness about the keto diet for type 1 diabetics. I’ll see you in the next video.


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  1. @wisesophie9671 on March 6, 2024 at 1:07 pm

    Hi, everyone! Who has just started a keto? I’ve been doing mine for a week and feel so great!
    Hello from Thailand!

    • @ada0944 on March 6, 2024 at 1:19 pm

      Same here. Just started mine 1 week and 1day in now and I feel great plus I have lost some weight too

    • @geoffreysmith9505 on March 6, 2024 at 2:37 pm

      Me, I’ve been into about 3 months…so far so good, except my LDL went way up. But supposedly that is normal..

    • @KJB0001 on March 6, 2024 at 3:40 pm

      Not meI -started in 2013 and My dad started in 1972 with Dr Atkins first book

    • @rhill3453 on March 6, 2024 at 3:58 pm

      Same here I’m 4 mos in cheated over the holiday season. I happen 2 love cornbread stuffing & cranberry sauce so I gave in2 having some during the holidays. Apart from the weight loss i have noticeable improvements in my overall health.

  2. @hiamsindy6239 on March 6, 2024 at 1:08 pm

    I am so happy to hear your video this morning!!!

  3. @bestofutkarsh on March 6, 2024 at 1:08 pm

    I have been

    1. drinking Heapwell Ceremonial Matcha
    2. Intermittent Fasting 18/6 hours

    Lost 8 kg in 3 months at a healthy pace

    • @dloadrussell on March 6, 2024 at 2:35 pm

      Kinda similar situation here. I do fasting 16/8 , quit sodas and starting working out. I have lost 4 kg in one and a half month pretty comfortably. I have yet to fix my sleep schedule and lower my carbs even more. I’m fascinated to continue the process

  4. @giudittalucia9545 on March 6, 2024 at 1:08 pm

    Dr. Berg you’re amazing! Thank you and God speed!!!

  5. @ketolorabaltimore1843 on March 6, 2024 at 1:34 pm

    Great interview with the 2 docs love you guys

  6. @trashboi-bk on March 6, 2024 at 1:42 pm

    Just broke into my first sustained 20/minute mile over 5 miles with a 15lbs pack weight of the season. Walking can’t really be overstated on how good it is. It nukes time sure, but something about it just feels good and works well. Hoping by the end of the season I’ll be able to keep the slow jogging constant so I can push to runs when needed without breaking form. Eventual goal is a marathon a day.

  7. @paxalotin on March 6, 2024 at 1:44 pm

    Hello Dr Berg — straight off the bat —-
    The first thing I learned from this interview – is that Type 1 & Type 11 Diabetes are NOT the same.
    I always thought that Type 2 Diabetes & Type 1 Diabetes were different stages in the same condition – —– Dr Ian Lake has explained it perfectly.

  8. @ravenomega2443 on March 6, 2024 at 1:45 pm

    This reminds me of how David Goggins was training to become a Navy Seal and he only had about 90 days to lose about 100lbs. Lots of running and minimal eating.

  9. @dianaanakhasyan on March 6, 2024 at 1:46 pm

    Hi Dr. Berg! The timing was great for this video and I learned so much. I have been struggling with PCOS, pituitary micro adenoma, and I possibly have Endometriosis. I would love to see an updated video on endometriosis and how women can heal themselves without surgery. I’d also love to know how my other conditions correlate with endometriosis if there’s any relevance. Above all, thank you!

  10. @Lauraway2 on March 6, 2024 at 1:54 pm

    I truly learned a lot. I will be watching again to get all the facts correct. Thanks.

    • @usewisdom2 on March 6, 2024 at 5:11 pm

      Same here

  11. @tinacox9526 on March 6, 2024 at 2:01 pm

    Awesome interview video we been doing keto for 2 years and I fast my hubby was a pre diabetic and he lost 55 pounds now

  12. @QuipHatch on March 6, 2024 at 2:12 pm

    0:00: ⚡ Interview with a doctor who fasted for five days and ran five marathons as a type 1 diabetic.
    3:43: 💉 Explanation of the difference between type one and type two diabetes, insulin resistance, and the role of insulin in blood sugar and fat storage.
    7:44: 💡 Importance of lowering insulin levels to initiate fat burning process and utilize body’s multifuel capabilities.
    11:19: 💧 Tips for transitioning to a low-carb diet and entering ketosis effectively.
    14:41: ⚠️ Understanding the difference between nutritional ketosis and diabetic ketoacidosis in type 1 diabetes.
    18:26: ⏰ Experience of fasting, initial difficulty followed by adaptation, subsequent fasts easier with no hunger.
    21:50: 💪 Importance of maintaining muscle mass while in fat burning mode through controlled fasting.
    25:28: 🏃 Discussion on keto diet benefits, running long distances, and calorie intake for fat loss.
    29:18: 🥩 The speaker follows a mostly carnivore diet, avoiding carbs, seed oils, and sugar, while incorporating dairy and some vegetables.

    Timestamps by Tammy AI

    • @davesims7917 on March 6, 2024 at 3:30 pm

      Did an AI really put that together?

    • @AnasaRobin on March 6, 2024 at 3:35 pm


    • @kaznika6584 on March 6, 2024 at 4:09 pm

      ​@davesims7917 Yeah, they are all over YouTube now.

  13. @timrachow-ey9mt on March 6, 2024 at 2:22 pm

    This was an outstanding and enlightening video. Thank you both for your time & insights.

  14. @josephburns-zd2kr on March 6, 2024 at 2:23 pm

    Thank you, Dr. berg! That was very informative information!

  15. @MarieWilliams027 on March 6, 2024 at 2:34 pm

    An amazing interview, Dr Berg! Loved the fact that a medical doctor was invited to share his own thoughts and experience on this topic. You’re a wonderful professional 💖

    • @rhondak4940 on March 6, 2024 at 4:45 pm


  16. @a.williams45 on March 6, 2024 at 2:43 pm

    Such a wonderful interview, Dr Berg. Excellent informative content. Thank you 🙏🏻

  17. @cindyrhodes on March 6, 2024 at 3:05 pm

    Dr. Berg, when I first discovered you, it was from a referral from a friend who suggested that i try keto for weight loss. I watched your videos every single day and saved bideos for a personal playlist, and i listened all through the day for support. I lost 96 pounds and have kept it off for 4 years. Over the past 4 months, though, my situation has changed, and i am struggling: every day is an uphill battle. Please consider doing daily KETO bideos again. Your information and presentation are always so rich, and I appreciate you so much! 🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉🎉

    • @lexibat7829 on March 6, 2024 at 4:34 pm

      Dr. Berg had to chill on using the word, “keto,” because YT is suppressing keto content. (And promoting the “keto diet is dangerous” narrative).

  18. @countrynurse on March 6, 2024 at 3:19 pm

    9 months ago I was 67 and pre-diabetic, 6’/245 lbs., went on 20-4 fast everyday, run 10 miles and walk 10 miles per week. I still eat carbs but a more reasonable amount. I’m now 175 and back to a size 32. Fasting/exercise works!

    • @truincanada on March 6, 2024 at 3:44 pm

      That sir is VERY VERY INSPIRING. Excellent work at 67! Im 225 and 56. Im going to do the same. Great leadership sharing. 😊

    • @theonlyonestanding8079 on March 6, 2024 at 4:31 pm

      So what time eggzackly did you eat?

  19. @DomCorleone-yo8sk on March 6, 2024 at 4:15 pm

    Cut out all sugar, only eating fruits and vegetables, and Grass fed beef. One meal a day I have lost 25 pounds in 45 days.

  20. @kneckel on March 6, 2024 at 4:48 pm

    My mom is a type 2 diabetic and she has been doing intermittent fasting for over a year now and has reaped amazing benefits from it. In addition to loosing the weight, she has regained mobility and energy, she has even started looking younger.

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