I haven't seen it waived. As Gastrapathy mentioned, true anaphylaxis to things like peanut butter, bee stings, etc., renders you unable to deploy. There are also vaccines that the military requires that you might not be able to take, although I'd have to check the specific literature on that.
Also, when I was doing the flight surgeon bit for the Air Force, I came across a couple of people who "discovered" they had anaphylactic reactions to certain things while they were wearing the uniform. Luckily they suffered no permanent harm, but I had to file some paperwork called a medical evaluation board that led to their quick medical discharge from the service.
Long story short, I doubt that you'll make it past the initial intake medical history form. Do NOT lie on this just because you think you want to be in the military. Aside from the legal ramifications, you would be one MRE containing peanut products during basic training away from getting yourself killed.