Fasting/keto question

Answered on April 16, 2019
Created May 31, 2017 at 4:21 PM

Hi everybody

I've been fasting along the 16/8 model by and large for the past few years. I usually take some MCT and cream or butter in my morning coffee. This all works fine. But it seems to me that while I have no trouble being in a fasted state for 16 or so hours, my body NEEDS carbs in the afternoon. I generally try not to do this, but my concentration really suffers. What is going on? Should I just eat the carbs and not worry about this? Why can't I maintain brain energy throughout the day? In the past, when I've gone ultra-low carb with lots of fats, after a few weeks I begin to suffer. My body just does not seem to like it. Any thoughts on this?

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2 Answers


on April 16, 2019
at 08:31 AM

Keto diet was originally designed for patients suffering from epilepsy and seizures and not for weight loss. Cutting down carbs because the brain functions on carbs, which we eat.

The diet worked for patients with epilepsy and seizures because it was eliminating the main power source of the brain.

Doctor warns Keto diet cuts carbohydrates to a potentially dangerously low level, which can greatly interfere with the brain functionality, making you dizzy, lethargic, and even confused.


Moderation is key.

Portion control paired with exercise will yield the healthiest results and help you keep the weight loss.

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on June 01, 2017
at 10:27 PM

I'm giving keto and intermittent fasting a try and loving the results as well! I haven't had any concentration problems or felt as if I needed carbs for any reason.( I'm still cycling in some higher carb days with a starchy veggie like sweet potatoes once or twice a week so maybe that's why.) Are you doing the 16/8 fast every day or just a few days a week? I only fast 4 days a week and keep it keto the rest of the time. The metabolism is a moving target and some of the backlash you're experiencing may be from staying too low on carbs for too long. 

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