Is calorie intake the sole factor in determining weight gain or loss?

Calorie intake is a key factor in determining weight gain or loss. When you eat more calories than your body uses, you gain weight. If you eat fewer calories than your body needs, you lose weight. This idea is called an 'energy deficit.' However, calorie intake is not the only thing that matters.

1. Metabolism: Your body's metabolism, which is how fast it uses energy, also affects weight. Some people naturally burn calories faster than others.

2. Diet Quality: The types of food you eat can impact weight. Foods high in nutrients help your body use energy better.

3. Physical Activity: Exercise helps burn calories, which can help with weight loss.

4. Other Factors: Things like sleep, stress, and even genetics can influence weight changes.

In summary, while calories are important, other factors also play a role in weight management. Eating a balanced diet and staying active are also important for maintaining a healthy weight.