Dr. Thomas Paloschi, a longevity medical doctor specializing in preventive age management, emphasizes that fat loss is a complex process influenced by various factors beyond just diet and exercise. He identifies seven key reasons why individuals may find it challenging to lose weight, even when they are disciplined. These include a decrease in daily movement, which can reduce calorie expenditure; sleep deprivation, which can increase appetite and food intake; and the consumption of ultra-processed foods that lead to higher calorie consumption and lower satiety. Additionally, conditions like insulin resistance, hormonal changes during menopause or due to polycystic ovary syndrome (PCOS), side effects from certain medications, and impaired mitochondrial function can all contribute to stalled weight loss. Dr. Paloschi advises that when weight loss efforts plateau, it is crucial to consider these underlying biological factors rather than simply increasing exercise or reducing calories further.