A lot of celebrities these days chalk up their slim physiques to their vegan diets. Is veganism a valuable tool for weight loss? The fact of the matter is, a vegan diet isn't virtuous in and of itself, you can be a vegan who eats bread and sugar all day. Just because a cookie is vegan does not mean it is low in sugar and calories. Let's take a look at the facts. Tune in 2/25 at noon ET to find out.