Calories In Calories Out

The concept of "calories in, calories out" (CICO) oversimplifies the complexities of human metabolism and weight management. While it's true that weight changes are influenced by calorie intake and expenditure, this approach neglects critical factors such as hormonal regulation, nutrient quality, and individual metabolic differences. For instance, not all calories are equal; calories from protein can have different effects on metabolism compared to those from sugars. Moreover, CICO ignores the impact of stress, sleep, and gut microbiota on weight. A focus solely on calorie counting can also promote unhealthy relationships with food, potentially leading to disordered eating behaviors. Sustainable weight management should consider overall diet quality, lifestyle factors, and individual health needs.