Nutritionists are calling for calorie intake and nutrition information to be reviewed.
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The system for counting calories comes from chemist Wilbur Atwater. To find out how much energy we get from eating, he measured the nutritional value in food and subtracted the amount of energy left in people's bodily excretion.
His research resulted in the 4-9-4 rule: Each gram of protein, fat, and carbohydrate provides 4, 9, 4 calories of energy, respectively.
When we are hungry, the hormone ghrelin stimulates the brain. Our brains pay more attention to cues for unhealthy foods—those which are high in sugar and fat—than healthy foods when we are hungry.
It may be possible to train ourselves to ignore tempting cues.
Snacks keep us over till the next meal. Balanced snacks and meals at consistent times during the day keep your blood sugar stable and keep you from overeating.
Healthy snacking include protein, fibre, and other nutrients that will keep your blood sugar in an optimal range. In contrast, low blood sugar causes exhaustion and makes you crave sugary or fatty foods.