Why do kcal requirements tend to diminish after the age of 25? Why do nutrient requirements not diminish at the same time? Answer should be brief based on nutrition throughout lifespan

Answer 1

After the age of 25, basal metabolic rate (BMR) tends to decrease, resulting in a lower energy expenditure and therefore lower kcal requirements. Additionally, muscle mass tends to decrease and fat mass tends to increase with age, further reducing energy needs. However, nutrient requirements do not diminish at the same time because the body still needs essential nutrients for cell maintenance, repair, and overall function throughout the lifespan. In fact, nutrient needs may increase in older adults due to factors such as decreased absorption and increased risk of chronic diseases.