In my case, it began with a well-researched and supervised seven-day fruit and vegetable juice cleanse (during which time I weaned myself off caffeine), followed by an entirely plant-based nutrition program -- an animal-product-free regimen I have adhered to ever since.

CNN: From miserable man to 'Ultraman': A fitness journey

One concern cited by panelists was the fact that vegetable and fruit juice as a product would likely prove to be less addictive than coffee.

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Diet sodas, fruit juices and dairy-based drinks are safe (if more than 50% milk and more than 70% fruit or vegetable juice).

WSJ: New York City Soda Restrictions: Ounces of Outrage