I made a dinner tonight with one of those "boxed meals" (I can't think of the name of it right now). Anyway, in the box there is two types of meat, noodles, and sauce. When I started eating it, I noticed it had a really weird taste. I then looked at the expiration date and it expired one year...
28 is not too old at all to learn martial arts. There are people of various ages in martial art classes and many very good ones were over 28 years old when they started.
Good luck to you.