Quoted from Dent00:yes, if you have no problems detected, once every 10 years is the norm.
I can tell you from personal experience that this is not something that you want to do.
I had the green lime flavor stuff to consume and I had no idea that I was capable of peeing from the wrong area...
But you can with the stuff that they require that you consume, along with eating nothing for like 24 hours.
It is a traumatic experience and I don't recommend it for anyone unless it is completely necessary, which doctors will tell you that it is, after age 50.
Pretty close to torture...
Torture?You obviously weren’t raised in a Catholic orphanage in the 60’s!