Black Ox is just what it says. As a man in my late 40's my test levels had been decreasing for the last few years. No energy or desire beyond getting thru the work day. My workouts were sluggish too. I tried different products with minimal success. Then came across Enhanced and Black Ox. After a couple of weeks, I could see my energy levels coming back. Still no spring chicken but now can get thru the day and power thru my workouts with energy to spare. Good product for me and hopefully for many others as well.