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.

I had an interesting question from someone that wanted to know why do I get so angry and irritable when I start fasting.

It's a legitimate question and quite a few people have this happen.

And I want to talk about exactly what's going on.

There's actually three main types of fuel

that your body actually runs off of.

You got sugar, you got ketones over here,

and then you have fatty acids, okay?

So when someone lowers their carbs and sugars

and they start producing ketones as their main fuel, They're only going to really be running on 40% of

ketones. Nearly 60% of their fuel is fatty acids. The metabolic switch that makes this all happen

isn't always efficient. If you have a history of having long-term insulin resistance,

then it's going to take a while for your body to become more flexible in this transition.

And in the process, you might feel more irritable when you fast.

You might feel angry, edgy, not very friendly.

You might have a low tolerance to stress. And this is all occurring because of two

things happening in your body. One is the years of insulin resistance is making it difficult to

get any glucose in the cell because you need insulin to absorb glucose. And so if you have insulin

resistance, you're not pulling in glucose.

And then when you go in a low-carb, low-sugar diet, now you're really going to be low on glucose.

So you're going to be dependent on ketones and fatty acids. But the problem is your brain is

the only organ that can't use fatty acids. It can only use ketones and glucose. Well, you haven't

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