Your metabolism is a delicate thing. If it goes out of balance (and with these stressful times, that isn't hard to do) you can gain wait.
And the problem with this is once your metabolism is out of whack, it takes a while to get things back to normal. And until you do, you won't be able to lose weight.
Herbs can help. There are several herbs that can help boost your metabolism. I like to approach fixing metabolism from a variety of different perspectives.
Want more information? Check out How to Boost Your Metabolism with Herbs at ehow.com.