14 Foods That Could Be Secretly Triggering Your Brain Fog

2. White Bread: The Glucose Rollercoaster's Aftermath

Beyond simple blood sugar spikes, a slice of **white bread** initiates a profound metabolic rollercoaster that directly impacts brain clarity. Its rapid digestion causes an acute insulin response. This intense insulin surge can then lead to an overcorrection, dropping blood sugar too low (reactive hypoglycemia), depriving the brain of its primary fuel. The resulting energy crash and subsequent scramble for glucose create a distinct mental dullness, hindering focus and memory. It’s the sheer speed of absorption, not just the sugar content, that fosters this cognitive turbulence.