Should I declare a minor if it is not required? With my current major (Medical Lab Science) I am not required to declare a minor at my university. However, the program's supervisor informed me that through taking all of the required courses to complete the program, I will only be one credit in chemistry away from being able to declare a chemistry minor.

Is it worth it? Is there any real positive prospect in declaring a minor if it's not necessary, given my major?
Why not? What's the disadvantage? An afternoon of paperwork? One extra class you have to take?

Compare that to the advantages: Let's say you are looking for work, can't find any in your chosen field (medicine), and so begin looking to work in a chem lab. Being a "medical lab science" major doesn't necessarily mean you know how to do a lot of chemistry, it may just mean you know things about handling biohazards like blood carefully. A hiring manager who doesn't know your school or that program doesn't know how much or little chem is required for such a major. You can't prove you know any chem unless they ask for a transcript or you have relevant work experience. But having "Minor in Chemistry" on your résumé would show that. So you could potentially land a low-level chem lab job easier that way.