I stand by my statement in panel three. If there were any fruit in Dr Pepper, even prune juice, they’d shout it from the rooftops.
Also, if it acted as a laxative, which is a common piece of anti-Dr Pepper propaganda, they’d repackage it as a medicine and charge a lot more for it. Especially if it was a gentle laxative. There’s a huge market for that sort of thing. Watch any daytime TV and you’ll see that I’m right.