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Which energy substrate is commonly used in parenteral nutrition?

Amino acids

Dextrose

In parenteral nutrition, dextrose serves as the primary energy substrate because it provides a readily available source of carbohydrates for metabolism. When administered intravenously, dextrose is easily absorbed and can quickly elevate blood glucose levels, which is crucial for patients who cannot consume food orally or who have higher energy needs.

Amino acids are essential to provide protein for tissue repair and muscle maintenance, while fat emulsions are included to supply essential fatty acids and additional calories. Vitamins are vital for various metabolic processes but do not directly contribute to energy supply. Thus, dextrose is the most significant and commonly utilized energy source in parenteral nutrition plans.

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Fat emulsions

Vitamins

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