Your vitamin B12 level. A low level of vitamin B12 in the blood indicates pernicious anemia. However, a falsely normal or high value of vitamin B12 in the blood may occur if antibodies interfere with the test. Your homocysteine and methylmalonic acid (MMA) levels. High levels of these substances in your body are a sign of pernicious anemia.
Nov 18, 2019 · Age-related macular degeneration: A group of Harvard researchers looked at a group of older women and explored the effects of B vitamins (folic acid, B12, and B6) on these participants. The group receiving B vitamin therapy showed a lower incidence of age-related macular degeneration (AMD) than the control group.