I am 56 yo male, athletic build, healthy diet, everything fine, until about a month ago, when I started to feel mildly to moderately nauseated. Some foods and drinks I used to like now would make me sick - no more alcohol, no coffee - for example. Nuts and seeds I was eating - not interesting. I can still eat Italian, Chinese, Mexican sort of food for example. Almost forgot what it is like to feel good - what is wrong with me?