b'Chapter 5Numerous vitamins, minerals, herbs, and other nutrients have been shown to elicit a positive immune response. Presented here is a list of some of the best immune-stimulating nutrients and herbs.Vitamin A:Supplemental vitamin A stimulates almost all components of the immune system. Vitamin A triggers macrophage response to antigens. It also increases the activity of both cytotoxic T-cells and natural killer cells against cancerous and virally infected cells. Additionally, vitamin A enhances B-cell production of antibodies. B vitamins:A healthy immune system needs B vitamins. In particular, anti body production requires pyridoxine (vitamin B6), and phagocytosis (the eating of antigens) requires B12 and folic acid. Pyridoxine is needed for the synthesis of white blood cells. B vitamins are also used in the production of stress hormones, and their deficiency worsens our stress response. B vitamins can help people who are exhausted and prone to frequent infections. B vitamins are also indicated for people with autoimmune diseases. Vegans and individuals with inflammatory bowel diseases are susceptible to developing B12 deficiency.Vitamin C:This powerful antioxidant nutrient supports the phagocytic and cytotoxic activity of lymphocytes and natural killer cells. At higher intravenous doses, vitamin C may be able to selectively destroy cancer cells. Vitamin C is an essential nutrient for many critical bodily processes. Humans are unable to produce our own vitamin C, which means we must obtain it from dietary and supplemental sources. In addition to its myriad effects on the health of our bones and connective tissue, vitamin C is a powerful antioxidant. Additionally, vitamin C is involved in white blood cell production and the actions of macrophages and T-cells.IMMUNITY9'