Speaking specifically of transfer factors, do they play any role in boosting the innate immune system, as would other immune boosters like beta-carotene, Vitamins A and C etc.?
Transfer Factors contain inducers that directly boost the innate immune system. Transfer factors also contain a biofeedback mechanism that controls the battle, so that the natural killer cells activity can be decreased as the battle ends. Transfer factors do not use the same pathway of boosting that the other nutrients utilize. Transfer factors contain the actual inducers that are used naturally by the body to boost innate cells.