Why is it that some women feel satisfied on any diet they follow, while you, subscribing to the same plan, remain hungry 24/7? Drinking extra water, eating in small bites and chewing slowly don't work. You still feel famished all day every day. What gives? It turns out that sneaky hidden sources may be keeping your hunger on overdrive. Follow this checklist to get back on the happy-diet highway.

1. Check your taste buds. One in four people have taste buds with a high tolerance to sugar, so it takes more sugar to satisfy them, say Michael Roizen, MD, and Mehmet Oz, MD, authors of You: On a Diet. The opposite of these "undertasters" are "supertasters," which includes another 25 percent of us. Supertasters have a hard time enjoying fruits and vegetables because the bitterness is overwhelming. Since most diet plans are heavy on veggies, they can leave people who have this condition strongly dissatisfied. To check your taste buds and see if you fall under either of these categories, mix one packet of Sweet'N Low with two-thirds of a cup of water. If the concoction tastes more sweet than bitter, you're probably an undertaster. If it tastes more bitter than sweet, you're probably a supertaster. If it tastes just plain gross, congratulations! You're a "regular taster," like the rest of us.