Many people believe that eating only home-cooked food automatically prevents weight gain. However, after the age of 35, metabolism naturally slows down, which means the body burns fewer calories than before. If eating habits remain the same, even healthy meals can lead to a calorie surplus and gradual fat gain. Understanding your Basal Metabolic Rate (BMR) and creating a small calorie deficit through portion control can help manage weight effectively. Small changes in meal portions and calorie intake can gradually reverse weight gain and support long-term metabolic health.