In regards to the shrimpxtomato thing, the source was from a poster my grandmother bought for me a few days ago about (one was good food combinations and the other was bad food combinations). I did a quick google search and found a decent sized photo showing the entire poster. Don't worry about not being able to read chinese because it shows the picture of the food stuffs. Go have a look!
For the bad food combinations poster, some of them aren't actually "bad" in a sense that they would harm you. Some of them just say that if you eat A with B, you won't get a specific nutrient from A. (ex: Chocolate + Milk)
I guess it's more accurate to call it a mutual restriction poster, but "bad combinations" sounds better... xD
Chapter 538 is brought to you by SummerRain and alyschu.
This chapter was sponsored by Anton L, Eric S, Cameron W, Casey F, Cameron C, James T, Leland, anon#J, and Jonathan He. Thanks guys!