My latest labs are total test 612 ng/dl and free 17.69 ng/dl. I do not do TRT but do use daily Cialis 5mg . Few weeks ago and on occasion morning wood and really good election quality and high libido. Then I go thru a phase of no morning wood lower libido . I take 50 mg zinc per day and I am wondering if this could be cause of potential low E? Have not ever had E test done before.