Starch-blockers claim to block the digestion of significant amounts of starch, but research shows there is no evidence that this has any long-term weight-loss benefits.

Many diet plans will "work" in the short-term, meaning you can lose weight on them. The question is, are they healthy and sustainable over the long run? Researchers are still trying to answer this question, and results so far are inconclusive. What is clear is that regular physical activity coupled with calorie control can contribute to your overall weight management.

The holidays may not be the best time to lose weight. After Jan. 1, starting a regular physical activity plan can help you cope with holiday stress and may help with weight management.