Placebos are fake medications or treatments that can trick your brain into thinking it's better. Often someone will think they are very sick when they actually aren't, and that's dangerous for the mind so people will give them fake medications. Its of cures and things atet will help seasickness and motion sickness are placebos. You could have a moral dilemma about wether it's actually helping you or if it just feels like it does.
A - at the time the even occurs
you can freeze dry it. You can put the food in an air tight bag.