What is the association between nutrition and immune function across the lifespan?

The association between nutrition and immune function is significant across all stages of life, making the choice that highlights adequate nutrition supporting immune health the most accurate. Nutrients play a crucial role in maintaining the integrity and function of the immune system. Essential vitamins and minerals, such as vitamins A, C, D, and E, along with zinc and selenium, are known to enhance immune responses. Proper nutritional intake helps optimize the body's ability to ward off infections and reduces the risk of chronic diseases that could compromise immune function.

Inadequate nutrition can lead to immune deficiencies, leaving individuals more susceptible to illnesses. Good nutrition is necessary for the production of immune cells and antibodies, which are pivotal during both childhood and old age when individuals might be more vulnerable to infections. Therefore, throughout the lifespan, ensuring adequate nutrition is fundamental for robust immune health.

The other options do not accurately reflect the established relationship between nutrition and immunity. They suggest misconceptions that nutrition does not impact immunity or that genetics alone determines immune function, disregarding the critical role of diet in modulating health.