Hi guys I'm new to the forum and would like to contribute to this thread...I personally like Maca root, it increases semen count and sperm count. It works with your endocrine system to balance your own hormones, and lots of men are walking around with lower testosterone than they should be. I personally take Maca and it works amazingly. I have noticed my orgasms are better when I'm on than when I'm not...Both of the times me and the wife tried to have kids, it was a 1 shot deal...I did take it on a combination with zinc....I am fortunate to work at a Whole Foods Market and can obtain it easily. 3 brands that I have used with success are " whole World Botanicals", "Natural Health International" and "Navitas" I have tried many Maca products in the past and these 3 work great. You have to be very consistent with Maca because of you skip around and take it inconsistently it won't work. Hope this helps