- The thymus secretes a family of polypeptide hormones that act on the structures and functions of the cellular immune apparatus, such as the maturation of T-cell precursors into fully competent T-cells.
- Thymus function declines with age, correlating with atrophy of the gland itself, and with the progressive, age-related loss of normal immune regulation.
- Vitamin A has been shown to stimulate the intercellular killing power of lymphocytes, one of the bodys most important forms of internal immunity.
- Vitamin C helps facilitate the production of lymphocytes, and may increase the number of its receptor sites, making them more capable of attaching to harmful bacteria and viruses.
- Inadequate levels of zinc have been shown to retard the proliferation of various types of cells necessary for proper immune function.
- Extracts of echinacea contain polysaccharides and other constituents with antimicrobial and immune-stimulating properties.