What is a common metabolic change that occurs with aging?

With aging, one of the most notable metabolic changes is decreased muscle mass, often referred to as sarcopenia. As individuals age, they experience a gradual decline in muscle mass and strength, which can significantly impact metabolism. Muscle tissue is metabolically active, meaning it burns calories even at rest; therefore, a decrease in muscle mass often leads to a slowdown in the basal metabolic rate. This decline can contribute to weight gain and a higher risk of metabolic disorders.

While other choices may seem applicable in different contexts, they do not accurately describe the common metabolic changes associated with aging. The basal metabolic rate typically decreases, glucose tolerance can worsen due to insulin resistance, and insulin production may not necessarily increase, further illustrating why decreased muscle mass stands out as the most significant change occurring with aging.