Does it work? Not really according to some. Read another article Here.
Nevertheless, it does taste good.
PS - Do not visit the Enviga site. It's a seizure-inducing, browser-crashing example of terrible design.
What do you all think about this? Not once in their Press Release does Coca Cola claim Enviga is supposed to be a "diet drink" to aid in weight loss, but the Enviga marketing materials are no different from other weight loss products on the market.