Recommending zinc supplement without multivitamins

As you all know by now, zinc supplement has been life-changing for me by helping me raise my Testosterone.  However, when I first experienced low-T and erectile dysfunction and realized I needed to increase my zinc intake, I noticed an immediate improvement.  But then, in my efforts to further improve my health and more importantly to make sure that I was getting enough copper and manganese, both of which get depleted when you take zinc, I started popping one of those One-a-Day 50 Plus multivitamin pills, but I also noticed that the improvement that I had noticed early on started to disappear.  I attributed that to simply reaching a plateau and could not figure out what was going on.

Well, in my life, I have figured out many things by chance, and so about a few weeks ago, I took a one-week vacation.  During my packing, somehow I forgot my multivitamin pill bottle and during that trip I took only zinc supplements.  I got the old feeling of solid erections back and while I am no doctor and cannot figure this out, it looks as if popping too many other vitamins and minerals is lowering the impact of zinc supplements.  So, my suggestion would be to try to eat nutrient rich food so that you can get most of your vitamins and minerals from your diet (and that is why I also encourage you to eat foods rich in zinc like oysters, beef, lamb, sesame/pumpkin seeds, cashews, lentils, garbanzo, turkey, wheat germ, and shrimp) and you do not have to take a multi-vitamin tablet, but more importantly just to make sure that you get enough zinc, take your zinc supplement that contains both manganese and copper.