What Happens When You Eat Too Few Calories

We’re told cutting calories is key to weight loss, and very low-calorie diets are normalized as a “healthy” approach. While they may lead to short-term changes on the scale, eating too few calories can have serious consequences for your metabolism, hormones, and overall well-being.

1. Slowed Metabolism

When you cut calories to lose weight, your metabolism slows down —meaning you are burning fewer calories at rest. Surprisingly, these adaptations seem to persist long after the period of calorie restriction, and even if weight is regained.

2. Fatigue

Calories are your body’s source of energy. When you don’t eat enough, you may feel more tired . This can be especially prevalent among athletes.

3. Hormone Imbalances

Your body needs energy and fat for healthy hormones . Studies amon