It means you should wash your hands thoroughly before you sit down for a meal (especially after a workout). You should also make sure that your silverware is free of any foreign particles. Foreign particles on forks and spoons (e.g. bits of dried oatmeal) that have been there for more than 12-16 hours have been implicated in muscle catabolism and abdominal obesity in one Swedish study. Granted the study was not randomized or double-blinded, but to be on the safe side, I would use plastic, disposable silverware if I were you. Good luck, and be clean.