Shouhed says starvation mode evolved “thousands of years ago when we used to be hunters and gatherers and didn't have refrigerators.” Our forefathers would feast one day and then go hungry for days.
The brain wants to keep everyone at a certain weight. Genes and environment determine this range. Dieting is famine to the body, which is wired for survival.
After calorie restriction, your body may function on 800 calories instead of 1,200. If you consume more than that, your body must find out how to use the extra calories.
“Severe calorie restriction often results in some degree of malnutrition, including micronutrient deficiency,” says Columbus-based staff dietitian Candace Pumper.
Micronutrient deficiency symptoms include: Cramps. Dehydration. Headaches. Irritability. Immunosuppression.
Fainting. Hormonal imbalance. Poor temperature regulation. Muscular tiredness. Nausea.
Vomiting. Constipation. Bone loss. Electrolyte imbalances. Various chronic illnesses, including death.
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Sleepiness, mental tiredness, mood swings, brain fog, and other psychological symptoms can also result from not eating.
Diet backlash—when merely the concept of a "forbidden" item causes overeating—can lead to a cycle of restriction, deprivation, overeating, and guilt.
Pumper argues that "gradual vs quick weight reduction is related with higher drops in fat mass and body fat percentage as well as significant preservation of RMR"
See your doctor or a certified dietitian to help you calculate and set realistic goals for calorie consumption and physical exercise to lose weight safely and effectively.
Finding the right caloric deficit to lose weight without starving can be tricky. Eastburn also notes its uniqueness