10/12/2026
If you're trying to reverse insulin resistance, this is one of the most important shifts to understand.
Your body was never designed to run on glucose all the time. It was designed to switch between two fuel sources - glucose and fat-derived fuel.
That switching ability is called metabolic flexibility.
Here's the problem.
Most people never switch. They eat frequently, eat high carbohydrate, and insulin stays elevated around the clock.
Over time, cells stop responding properly to insulin.
That is insulin resistance.
Now here's where it gets interesting.
When you fast, or reduce carbohydrates, your body is forced to switch fuel source. It starts producing ketones.
And one of those ketones, beta hydroxybutyrate, isn't just fuel. It's a signalling molecule.
New research has shown it can directly influence tau, the protein linked to Alzheimer's and cognitive decline.
So you get two powerful effects happening together.
→ You lower insulin, which allows cells to become sensitive again. This is the foundation of reversing insulin resistance.
→ You produce ketones, giving the brain a clean, stable fuel source. Especially important when glucose metabolism is impaired.
And potentially, you're influencing the biology of neurodegeneration itself.
You don't have to rely on willpower alone to get here. Certain foods can accelerate the shift.
Coconut oil is one of them. It contains medium chain triglycerides, around 20 to 30 percent of its fat content.
These fats bypass normal digestion, go straight to the liver, and are rapidly converted into ketones.
So even outside of fasting, you can start raising ketone levels and training your body to become more metabolically flexible.
This is why fasting and low carbohydrate periods matter for more than weight loss.
It's about restoring your body's ability to switch fuels, lowering insulin, improving cellular energy, and giving your brain a backup system to protect itself.
That's the real goal. Not just controlling blood sugar, but rebuilding the metabolic system underneath it.
Have you noticed a difference in your mental clarity when you fast or cut carbs? Let me know below.
