Natural ways to increase count

So DH and I have been TTC since October. He will soon have to get a sperm analysis just to check everything out. We feel it may be a little low. I know my doctor will tell me what to do if it is at that time but has anyone been through that and what did your husband take to increase his count? I have heard of Vitamin C and Zinc but just wanted to know if there is anything else he could be doing in the meantime. Thank you for any help!