Which nutrient deficiency can delay wound healing?

Zinc plays a crucial role in wound healing due to its involvement in numerous cellular functions critical for tissue repair. It is essential for protein synthesis, cell division, and the proper functioning of the immune system. A deficiency in zinc can lead to impaired collagen synthesis and cell proliferation, which can significantly delay the healing process of wounds.

In addition, zinc contributes to the inflammatory response and has antioxidant properties that help to protect tissues from oxidative stress. Without adequate zinc, the body's ability to respond effectively to injury is compromised, resulting in slower healing times.

While the other nutrients listed certainly have their roles in health and recovery, they are not as directly associated with the physiological processes of wound healing in the same critical manner as zinc. For instance, vitamin K is primarily known for its role in blood coagulation, vitamin B12 is vital for red blood cell formation and neurological function, and sodium is crucial for fluid balance but does not directly influence the healing mechanisms in the same way zinc does.