What's the plural form of hepcidin? Here's the word you're looking for.
Answer
The noun hepcidin can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be hepcidin.
However, in more specific contexts, the plural form can also be hepcidins e.g. in reference to various types of hepcidins
or a collection of hepcidins.