SCIENZA
Why you crave sugar (and how to learn to say no)
Published on June 16, 2026
Sugar cravings aren't a lack of willpower: they have a biological basis. Understanding it is the first step to saying no.
Sugar cravings aren't a flaw of willpower: they have a biological and psychological basis. Understanding it is the best way to manage them.
What happens in the brain
Sugar activates the reward system (dopamine): that's why it "pulls" you and creates a habit. The more you eat, the more the brain seeks it.
The spikes and the crashes
Foods that raise blood sugar quickly then cause a rapid crash: it's that crash that generates hunger and new cravings, in a continuous cycle (you can see it in glucose and insulin and in glycemic impact).
How to break the cycle
- Stabilize blood sugar: by eating at a low glycemic load (the foundation of keto), the spikes and crashes disappear — and with them most of the cravings.
- Awareness: knowing why you crave sugar makes it easier to stop.
- A method for change: Dr. Jen Unwin's G.R.I.N. method (goals, resources, small steps, noticing progress) helps you build new habits without feeling like you're on a diet.
Saying no isn't a matter of brute force: it's a matter of understanding and cutting off the fuel for the cravings.
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