How supportive/on board is your husband when I comes to trying alternative things to boost your fertility?

My husband and I have been ttc for awhile now. Before we started, we had a long talk and decided it was a good time to start trying for a family, so we stopped all forms of birth control. He was very excited the first few months and still gets really excited when we talk about our future kids, we just haven't gotten pregnant yet.

I have started taking vitamins/supplements along with a prenatal that are supposed to help you conceive (Maca root & vitex) and have improved my diet, (though it wasn't that bad to begin with) and started exercising to make my body as healthy as possible.

I have asked my husband to do similar things and he will if I hand him the vitamins, make him a lunch, etc but he never does it on his own. If I don't do it, he would eat fast food for lunch almost everyday. He also chews tobacco.

I know these things may play little function in our ability to get pregnant but for me, I really want to get pregnant so I am willing to try things that might help.

How do I get him to see it this way without him feeling like I'm nagging him to do so? Or am I going too crazy already and should I just calm down and wait for things to happen entirely on their own?

Any suggestions or input would be greatly appreciated.