Back in our high school days, one of our classmates, who I will not reveal (medical privacy), had occasional bleeding gums and told us his mother was taking him to the doctor.
He came back with the diagnosis: scurvy! What air ye? we asked. A pirate?
He was the first and only person I ever knew who had scurvy. “Arr! Avast, me laddie! Explain yourself.”
You would never guess it. As far as I know, he had never set foot on a boat of any kind, and wasn’t about to after that.