Don't let any health food nut convince you otherwise. You CAN get perfect apples in the US southwest from untreated trees. Some farmers in California use sulphur which is an alternative, but it is worthless in Michigan. Alternatives include buying or scrounging apples from farmers you trust and can them. Also, if you buy store bought apples, soak them in a mild soap and scrub them.
Apples are an easy fruit to clean.
I had a piano customer in Michigan who nearly lost a very healthy sister to one meal of shrimp. It is the shrimp. It is NOT worth the risk when so many other fish choices are available. Remember, shell fish, and many other sea food critters get their food by filtering the bio-organisms from sea water. This process means the creature is processing huge amounts of sea water in order to sift out the nutrients it needs.