Does hunger significantly ease cognitive functioning?

If I were to eat only 400 calories a afternoon would my ability to comprehend what I read, entertain abstract concepts, and contribute to intellectual conversations go down? And by how much?
Answers:
If you were to chomp through only 400 calories a day you would eventually die as your body needs anywhere from 1000 to 1500 calories merely to survive.

So yeah, your mental proficiency would decline a lot. Right down to zero.
The simple and direct answer, yes. Your brain runs on glucose. Glucose comes from your diet and is made from other nutrients bearing Calories. 400 Calories (capitol C, in actuality kilocalories) is too few and would impact your entire body, including your brain.

You can go farther into nutrient requirements and the effects of starvation, but this should be sufficient.
First, let's sermon about malnutrition in precipitate childhood development. Malnutrition in infancy early childhood decrease intellectual functioning and recovery after proper nutrition is instituted may be incomplete. Quantitation of these matters is largely statistical, so there are individual differences.

Now let's consider a teen next to anorexia. Many of the severe patients are dull and apathetic, some of which can be attributed to low thyroid levels, some to associated depression, and an unknown but probably existent portion due to poor nutrition. I treated one girl with severe anorexia who was valedictorian. She be an obvious exception.

If you have a serious desire to maintain a 400 Calorie diet, you inevitability professional help. You will do yourself great harm. Source(s): Retired pediatrician

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