Dr. Berg, 51 years of age is a chiropractor who specializes in weight loss through nutritional & natural methods. His private practice is located in Alexandria, Virginia. His clients include senior officials in the U.S. government & the Justice Department, ambassadors, medical doctors, high-level executives of prominent corporations, scientists, engineers, professors, and other clients from all walks of life. He is the author of The 7 Principles of Fat Burning.

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Transcript

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0:00.0	Welcome to the Dr. Berg's Healthy Keto and Interminute Fasting Podcast, where Dr. Berg takes you on the journey for the truth about getting healthy and losing healthy weight.
0:12.0	So sometimes going on a fast has the potential to lower a thyroid hormone called T3, and that's the
0:30.3	active form of the thyroid hormone. T4 is the inactive version. So I want to explain why that is.
0:37.1	We have the pituitary up here that communicates to the thyroidactive version. So I want to explain why that is. We have the pituitary up here that communicates
0:40.1	to the thyroid through this hormone called thyroid-stimulating hormone. And one of the main ways
0:46.8	that hypothyroidism is diagnosed is by looking at this hormone right here. But when you fast
0:53.0	through the ketogenic diet and do it healthily, you're not going to see a change in this hormone right here. But when you fast through the ketogenic diet and do it healthily,
0:55.3	you're not going to see a change in this hormone right here. So you are not going to have a true
1:00.6	hypothyroid condition or problem. Then the thyroid releases T4, which is the inactive form of the thyroid
1:09.9	hormone. To become activated, it has to work through the liver
1:13.5	into the kidney, but it converts from T4 to T3, and T3 is the active form of the thyroid hormone.
1:20.9	But there's something else over here called reverse T3. And the difference between T3 and reverse T3 is that T3 is active and reverse T3 is an inactive
1:32.6	version. Now, I'm not going to get into the tactical part of this, but I just simply want to
1:37.6	tell you that what determines the rate and ratio of this conversion to T3 or reverse T3 is the metabolic need because this has to do with preserving energy.
1:52.8	When you do a fast, you may see a slight decrease in T3, and many times it will still be within the normal range but you're going to see an
2:03.4	increase in the reverse T3. Your body is simply becoming more efficient with its fuel. So the need
2:11.3	for the active thyroid hormone is going to be a little bit less. The body will then put some of that
2:16.3	hormone into a little bit of
2:17.8	a reserve until you need it. And it'll be released once you are refeating and you eat again.
2:26.2	There are several situations where you'll see higher amounts of reverse T3. When you're doing fasting
2:31.9	or when you're recovering from a stroke or an injury or over-training
2:38.8	when you're exercising or when you're recovering from an illness or surgery or when you just
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