A nurse is reinforcing teaching with a client who has an open leg wound and is experiencing difficulty healing. The nurse should encourage the client to increase which of the following nutrients in his diet?

A. Fats: While fats provide energy and help with cell membrane structure, they are not the primary nutrient required to promote wound healing. Excess fat intake without proper balance may not directly aid in faster tissue repair. B. Calcium: Calcium is important for bone health and muscle function but does not play a central role in soft tissue wound healing. It is more critical in fracture healing rather than open wound repair. C. Vitamin D: Vitamin D supports calcium absorption and bone health. Although it contributes to immune function, it is not the main nutrient needed to directly repair skin and soft tissue wounds. D. Protein: Protein is essential for wound healing because it supports cell growth, tissue repair, and immune function. Adequate protein intake is critical to form new tissue, promote collagen synthesis, and restore skin integrity in clients with open wounds.