Slower Metabolism: Metabolism tends to slow down with age, leading to a decreased calorie burn at rest.

Muscle Loss: Aging is often associated with muscle loss, which further lowers metabolism as muscles burn more calories than fat.

Hormonal Changes: Hormonal fluctuations, such as decreased growth hormone and estrogen levels, can impact metabolism.

Reduced Activity Levels: Older individuals may engage in less physical activity, contributing to weight gain.

Decreased Energy Expenditure: Aging can lead to reduced energy expenditure during exercise and daily activities.

Less Efficient Digestion: Digestive processes may become less efficient, affecting nutrient absorption and calorie utilization.

Loss of Appetite: Some older individuals may experience a decreased appetite, potentially leading to unintentional weight loss.

Medication Effects: Medications commonly used by older adults can influence weight, metabolism, and appetite.

 Menopause: For women, menopause often leads to hormonal changes and weight gain, particularly around the abdomen.

Metabolism Variability: While metabolism generally slows with age, individual factors such as genetics and lifestyle choices play a significant role in how age affects weight loss and metabolism.