Discoloration

I have been doing PE for about six months. I have not measured, but I know I have gained. I am waiting to see a significant increase before I measure.

My question: I started doing Ulis and Horses about two months ago. The only concern is discoloration. As long as it isn’t dangerous, I don’t mind having a darker tool. Is it dangerous?

Thanks!

USE THE SEARCH BUTTON. Please, nobody reply to this. It’s been covered SOOO many times!