The micronutrient essential for wound healing is vitamin C. This vitamin is critical for the synthesis of collagen, a protein that helps repair tissues and maintain skin integrity. Vitamin C also plays a key role in the immune system, enhancing the body's ability to fight off infections during the healing process. A deficiency in vitamin C can lead to delayed healing and compromised tissue repair, making it vital for anyone recovering from injuries or surgical procedures to ensure adequate intake of this important micronutrient.