What are signs you are not eating enough calories daily?

When you're not eating enough calories, your body sends clear signals. Constant fatigue and low energy are among the first signs, since your body lacks fuel to function properly. You may feel dizzy or lightheaded, especially when standing up quickly. Persistent hunger, difficulty concentrating, and brain fog are common. Your metabolism may slow down, causing you to feel cold all the time. Physically, you might notice hair loss, muscle weakness, and slower recovery after exercise. Mood changes like irritability and anxiety are also typical. In more prolonged cases, irregular or missed menstrual periods can occur in women. If you're losing weight unintentionally or feeling weak during workouts, these are strong indicators your calorie intake is too low.