Trendy diets come and go, but one questionable — and expensive — plan has been hanging around for several years now. Thought ...

To learn more about Optavia's plans and offerings, I tested the products and spoke with a nutritionist. Here's what I found.

The most popular Optavia plan, called the "5&1," consists of eating five fuelings each day and one meal consisting of lean protein and vegetables. "It is basically a low-carb, high protein meal ...

On behalf of our sponsors at Optavia, we're learning some great tips to manage weight loss. Our Nicole DeCosta has the inside scoop.