We investigate everything you ever wanted to know about this soda alternative. Are they as healthy as they seem? What's really in them and how do they have so much flavor while being so low in calories? Plus, Health Court is in session: This woman says her best friend can't get enough of the keto diet, eating bacon and fatty foods and hurting her health. Her friend argues she's lost 30 pounds and won't turn back. Who's right?
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