 [ Symptoms ] can sexual contact affect blood iron levels [ Disease ] most helpful answer no i do not think you could physically have sex long enough without stopping to occasionally eat to become low in iron anemia sexual contact will not adversely affect iron levels so if you are anemic it would be important for you and your medical provider to determine why is your diet deficient in iron do you have a familial or genetic form of anemia are you having problems with excessive bleeding  blood loss