DEAR DR. ROACH: I was recently at the American Red Cross to donate blood and was given interesting material on the need for Black blood donors for sickle cell anemia patients. The booklet described how antigens work in red blood cells to improve patients’ health. I didn’t know until then that race can make a […]

DEAR DR. ROACH: I read in your column and elsewhere that vitamin supplements have no realized benefit. I’ve mostly read about how it doesn’t hurt, but there is no evidence that they help. Does this include fish oil (omega-3) supplements? I also take an iron supplement. Both of these had a net positive impact on […]