What does the body use to help in the metabolism of carbohydrates, fats, and proteins?

The metabolism of carbohydrates, fats, and proteins is primarily regulated by thyroid hormones. These hormones, produced by the thyroid gland, play a crucial role in controlling the metabolic rate, influencing how the body uses these macronutrients for energy. Thyroid hormones stimulate the metabolism of proteins and fats while also regulating carbohydrate utilization, ensuring that the body maintains energy balance and properly utilizes the nutrients obtained from food.

In the context of the options available, other hormones like cortisol and insulin also have specific roles in metabolism. Insulin, for instance, primarily facilitates the uptake of glucose and the storage of carbohydrates, while cortisol is involved in managing stress and has a role in glucose metabolism. Estrogen, while important in other metabolic processes, does not directly regulate the overall metabolism of these macronutrients as effectively as thyroid hormones.

Thus, thyroid hormones are essential for efficiently managing how the body processes carbohydrates, fats, and proteins for energy and overall metabolic function.