What are the signs you are not eating enough calories?

When you're not eating enough calories, your body sends clear warning signals. Constant fatigue and low energy are among the first signs, even after adequate sleep. You may feel cold all the time because your metabolism slows to conserve heat. Persistent hunger, irritability, and difficulty concentrating are common, along with headaches and dizziness. Physically, you might notice hair loss, brittle nails, and dry skin due to nutrient deficiencies. Muscle weakness and loss of muscle mass occur as the body breaks down muscle for fuel. Women may experience irregular or missed periods. Slow wound healing, frequent illness from a weakened immune system, and feeling anxious or moody are also strong indicators that calorie intake is too low.