Essential nutrients for immune support include vitamin C, vitamin D, zinc, and probiotics. Vitamin C helps bolster the immune system and protect against oxidative stress, while vitamin D plays a crucial role in immune regulation. Zinc is important for maintaining immune cell function and may reduce the duration of colds. Probiotics support gut health, where a significant portion of the immune system resides. A well-rounded diet featuring a variety of whole foods, such as fruits, vegetables, nuts, and fermented products, can help ensure adequate intake of these immune-supporting nutrients.