estrogen in males is not necessarily a bad thing. males need estrogen just as females need testoterone. too much or too little estrogen is horrible for a males health. the only time you need an aromatase inhibitor is if you are producing way too much (on a steroide cycle) or have symptoms of high estrogen. taking 100-300 mg/ml of test a week, you generally dont need an AI. that dosage is to get your levels up to normal, not a cycle. so no need for an AI if youre taking test the right way.