Curcumin is an active agent in turmeric. Studies show that turmeric has a direct impact on the immune system as it’s antiviral, antioxidant, antiinflammatory and also a potent immunomodulatory agent that helps with activation of T cells (important for immune response).
Calendula is one of the oldest known medical herbs. Historically, it was popular in Europe as an immune booster. Studies show that Calendula exhibits antibacterial, antiviral, anti-inflammatory, anti-tumor, antimicrobial and antioxidant properties. All important for boosting the immune system.
Cat's claw contains active ingredients that stimulate the body’s production of immune cells. Studies show that people who consumed cat's claw increased their number of white blood cells and thus boosting their immune system. Cat's claw is also antiinflammatory
Persistent response to pneumococcal vaccine in individuals supplemented with a novel water soluble extract of Uncaria tomentosa, C-Med-100. ncbi.nlm.nih.gov/pubmed/11515716
Burdock root is a powerful herb, it helps regulate immune cell migration and activation and some animal studies show that burdock root helped tackle freely circulating viruses, or viruses outside the infected cells in mice. Thus showing it potential immune boosting effects.
Research shows that Echinacea increases the number of white blood cells. White blood cells fight infections and are a key component of the immune system. Echinacea is anti viral, anti-inflammatory, antioxidant and antimicrobial, all very important for optimal immune function.
Echinacea intake induces an immune response through altered expression of leucocyte hsp70, increased white cell counts and improved erythrocyte antioxidant defences. - ncbi.nlm.nih.gov/pubmed/15985050