Intermittent metabolic switching, neuroplasticity and brain health

This paper reviewed research on “intermittent metabolic switching,” when the body shifts from using sugar to using stored fat and ketones, a fuel made from fat. It discussed fasting and low-carbohydrate diets, drawing mainly on animal studies and a small amount of human research. The studies suggested these changes may support neuroplasticity, the brain’s ability to adapt and form new connections. They may also improve the brain’s resistance to stress, but this paper did not test a new group of people or prove that fasting prevents brain disease.

What this means for you: This is not strong enough evidence to buy a fasting product or start a strict diet for brain protection. Healthy eating, exercise, sleep, and medical advice remain better-supported choices, especially for people with health conditions.