Additions to Mag-10 & Bent Rows

When taking Mag-10 would it advantageous to take other products such as Pinnacle Poppers or something to boost human growth hormone. If so when would be the best time to take the additions.

What is the best grip to use when doing bent rows. I've seen Dorian do them with a underhand grip and Ronnie Coleman with an overhand. I also do machine rows and 1 arm rows for my lats. Any advice would be appreciated.

MAG-10 alone is plenty. Besides, GH supplements are a waste.