The Biggest Lie About Fasting & Low Blood Sugar

What happens to your blood sugar while fasting? Is a 24-hour fast safe? Discover the benefits of fasting, the connection between blood sugar and insulin resistance, and what really happens to your blood sugar while fasting for 24 hours.

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0:00 What happens to blood sugar while fasting for 24 hours? 0:22 Fat burning and ketosis explained 1:21 Liver glycogen vs. stored fat 2:15 Fasting blood sugar and hypoglycemia explained 3:22 Gluconeogenesis 3:53 Muscles and fasting 4:41 When does your body switch to fat burning? 5:10 Autophagy while fasting 5:42 Insulin resistance 6:45 Why is fasting blood sugar higher in the morning? 7:24 Is hypoglycemia a blood glucose problem?

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Fat burning is not a backup method for energy. Ketones are actually the preferred fuel source for the body. The liver only stores about 400 calories of sugar as glycogen, while the average person has around 120,000 calories of stored fat available for energy.

Fasting does not typically cause hypoglycemia. During a 24-hour fast, you shouldn't experience a significant drop in blood sugar. This is because your liver can produce glucose through a process called gluconeogenesis, so you don't need to consume sugar to maintain blood sugar levels.

Between 12 and 24 hours of fasting, your body shifts toward fat burning. Fasting also stimulates autophagy, the body's natural process of cleaning up and recycling damaged tissues and proteins.

Hypoglycemia while fasting is often related to an existing insulin resistance problem, commonly associated with a high-carb diet. Depending on the severity of the problem, it can take time to correct after reducing your carbohydrate intake.

DATA: https://pmc.ncbi.nlm.nih.gov/articles/PMC13122063/ https://pmc.ncbi.nlm.nih.gov/articles/PMC2726723/ https://pmc.ncbi.nlm.nih.gov/articles/PMC12455479/

Dr. Eric Berg D.C. Bio: Dr. Berg, age 61, is a chiropractor who specializes in Healthy Ketosis & Intermittent Fasting. He is the Director of Dr. Berg Nutritionals and author of the best-selling book The Healthy Keto Plan. He no longer practices, but focuses on health education through social media.

Disclaimer: Dr. Eric Berg, D.C., 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.

*Dr. Eric Berg, DC, is not AI-generated. AI-enhanced elements may be used in this video for production purposes only.

Thanks for watching! I hope this helps you understand what happens to your blood sugar while fasting and the benefits of a 24-hour fast. I’ll see you in the next video.