'Fast Diet' Creator Discusses Controversial Methods on 'GMA'

Now watching

Next video starts in : 7 Play

'Fast Diet' Creator Discusses Controversial Methods on 'GMA'

'Fast Diet' Creator Discusses Controversial Methods on 'GMA'
Replay video
Up next

Shonda Rimes to Produce Biopic Film Based on 'The Dare Divas'

Unlock your personal NFL Now stream by signing in to NFL.com

'Fast Diet' Creator Discusses Controversial Methods on 'GMA'

by ABC News Videos

Dr. Michael Mosley responds to critics who suggest days of fasting could slow metabolism.

View Comments (13)