Can taking vit c with fish kill you ?

Shrimp and Vit C: Furthermore, shrimp does not turn into arsenic when it encounters vitamin C. It just doesn’t happen. Shrimp may contain low levels of arsenic, as it is a basic element and occurs naturally in the environment, but it is not a dangerous dose and your body can deal with it. Unless you eat shrimp until you sprout those weird antennae, then you might be in trouble.