Vitamin C is an essential nutrient well known for its vital role in immune system function. (nowfoods.com)
This summer, a slew of new studies reported results on efforts to shift the balance of cells in the immune system in hopes of keeping disease at bay. (sciencemag.org)
Unfortunately, because of changes in immune system functioning, many of these microorganisms are overwhelmed by other bacteria that bring disease. (mypetneedsthat.com)