I haven't had to do this since... Thursday last week...
And since I didn't drink red or purple beer, I definitely included that in my regimen. Doc didn't complain a bit. The beer was a damned sight tastier than the polyethylene glycol.
Go forth, and drink well. You're gonna need those B-vitamins, after all. Hell, monks live on beer during lent. They invented bock beer for the purpose.
FC