It would be scary, except it is not... at least, not as much as he would like to see it to bump his ratings and bring more people to watch his show that mostly peddles unproven, crappy and unresearched (if not plainly crappy) therapies and medical myths.
FDA has something to say about it, and they have some sound science behind:
There is no evidence of any public health risk from drinking these juices. And FDA has been testing them for years.Here is the consumer update: FDA: Apple Juice is Safe To Drink (make sure to check other links at the bottom of that page).
Also, worth reading:
Letter from FDA to The Dr. Oz Show Regarding Apple Juice and Arsenic (09/09/2011)
Second Letter from the FDA to The Dr. Oz Show Regarding Apple Juice and Arsenic (09/13/2011)
That proves once again that Dr. Oz can't be trusted as a source of any kind of medical advice, not only for his meddling with bogus treatments (Reiki, therapeutic touch), but also for doing crappy research.
UPDATE: Dr. Oz gets shredded to pieces on ABC News: Dr. Besser vs. Dr. Oz: Apple Juice Showdown on ‘GMA’
Dr. Oz is a quack, not to be trusted... plain and simple. He'll do anything to boost his rating and he'll sell you just about anything to accomplish that. I guess he learned well from his mentor.