Suggestions

I suggest taking a look at the Baby Nutrition, Pregnancy/Birth and Parenting forums here - and like anything here at CZ, including what I write, do your own research before blindly taking any suggestions.

Since your wife is the one who will actually be carrying and having the baby, I strongly suggest that you make your research a joint effort and not try to tell her what to do.  For some odd reason, a lot of women are not exactly thrilled by a guy having his 15 seconds of contribution and then trying to dictate the rest of the entire process.  Don't fall into that trap and possibly introduce resentments into what should be the ultimate expression of love and creation.  Take her hand as a partner and try to gently steer her towards a healthy solution.

The good news is the fact that she IS married to you and IS having your child indicates that you do have some powers of persuasion.