Unlike heart health supplements, which supply fatty acids, sterols, fibers, minerals, botanicals, or other ingredients marketed around cardiovascular variables, immune support supplements provide vitamins, minerals, botanicals, or other ingredients marketed around immune function, although immune effects are ingredient-specific and no broad supplement category can guarantee prevention, treatment, or cure of infection.
The useful distinction begins with different mechanisms. For immune support supplements, examine immune function and nutrient status; for heart health supplements, examine cardiovascular endpoint and formulation. Features should enter the decision after the user's actual need is explicit.