Hallo... tomato juice do helps for man. It's believe to prevent male's cancer too.
You can borrow books from library written by a taiwanese famous dietary consultant. I can't type chinese here, you his name is Ou Yang Ying - example -
http://www.yesasia.com/us/1004076991-0-0-0-en/info.html
In his books, he stated 2 vege to be man's saver. Tomato and "jiu cai". (Jui cai is like green onion shape, long like straw, but no hole in the middle). You can get from NTUC or you will find that vege in the mee siam sometime. HOpe you get wat i mean. Teo chew kueh oso have this vege inside. I normally cut small small and fry with egg, and eat with rice. Believe it helped.
For the juice, either you can get idea from the Ou Yang Ying books, or you can mix and match the following:
Tomato, apple (green or red), orange, star fruit, cucumber, celery, carrot, ginger(a little bit), plum, papaya, purple cabbage, bitter guord, lemon. Remember all must deskin, for those with skin, coz worry of chemical, unless is BIO, then you can skip to deskin.
Normally i mix all the green together, like green apple, celery, lemon, ratio is 5:5:1. Me and hubby will have like 2 cups a person, abt 600ml per pax bah. Drink till whole stomach full.
Try it, hope it helps you all. Good luck!