Do you have to peel citrus before juicing?

Excuse me, I'm curious about juicing citrus fruits. Is it absolutely necessary to peel them before extracting the juice? I've heard some people argue that the peel contains essential oils and nutrients that can enhance the flavor and health benefits of the juice. However, I've also heard that the peel can be bitter and potentially contain harmful pesticides or waxes. So, what's the verdict? Do you recommend peeling citrus fruits before juicing, or is it SAFE and beneficial to leave the peel on?