1) Special proteins produced by the body in response to foreign substances including bacteria and viruses; there are five structurally distinct classes of immunoglobulins produced by plasma cells in the bone marrow and other lymphoid tissue that bind to and neutralize foreign substances (antigens).
People give up eating meat and animal products such as milk, cheese, and eggs for many reasons. But doing so may increase the risk of anemia, a potentially serious condition in which the body does not make enough oxygen-bearing red blood cells. For vegetarians who eliminate meat, anemia can be due to an iron deficiency.
The problem with this is that since 75-80% of natural immunity resides in our GUTS, this actually reduces our natural protective barrier. There are foods rich in probiotics you can eat to help keep your GUT integrity strong and also guard against leaky GUT. Some of these include: 1  Yogurt. 2  Kefir (both dairy and water). 3  Apple cider vinegar or other traditionally fermented vinegars. 4  Naturally fermented vegetables; sauerkraut, kimchee.