i am 69 years of age male .After no illness at all in my life so far i have been told I am anaemic , my blood count has dropped by 30% .I have been prescribed iron tablets for an 8 week period .i have had no blood loss , have taken part in the bowel cancer tests for 2 to 3 years without any issues detected .What are the usual reason for this to happen at this stage?I am eating veg , liver , steak ,dried apricots to get iron into my system and was considering having 3 pints of guinness a week ( does it help ? )I walk 4 miles most days.Can you advise why this may have occurred , Thanks Brian Lilley