@ysmina-- I take my vitamins for male fertility separately because it's hard to find a single supplement with everything and multi-vitamins tend to have high doses of some vitamins and low doses of others.
I'm taking vitamin B12, vitamin C, vitamin E and krill oil. The krill oil is for the Omega 3 content, so any other supplement that's a good source of Omega 3 can be taken as well. I usually take vitamin B12 and vitamin C one day and then vitamin E and krill oil the next. This reduces potential side effects of the vitamins.
All of these supplements are basically antioxidants and natural anti-inflammatory compounds. I think it's the toxins and inflammation that damages sperm.