What is actually better?

I am taking a multi vitamin by GNC MegaMen and Isopure protein.The protein has vitamines too , should i be taking both should i just take the protein.I take the vitamine in the morning at 530 before i go to work and take the protein before and after i workout like around 730 pm. I run and do alot of situps and started to lift heavy weights about two months now.I am thinking about just taking the protein twice a day instead of the vitamine morning and after noon