A big part of my recent weight loss-especially my shrinking waistline-may have been the easiest thing I did in the past year (and still do!): Eat vitamin C-rich fruits every day. I usually have them as a midmorning snack or as part of my breakfast. If not an orange or grapefruit, I'll mix strawberries with lowfat yogurt to ensure I'm set on C for the day. (You can even buy unsweetened green tea with vitamin C.)

This nutrient helps curb fat absorption, and studies show that low levels of C are associated with bigger waists. Also, people with the most vitamin C in their blood have the lowest body-fat percentages, researchers at Arizona State University at Mesa say. But about 30 percent of Americans don't get enough of the vitamin. Women need only 75 milligrams a day, 90 mg for guys (about the amount in a cup of strawberries or an orange).

Try this tasty recipe to get your daily dose. This zippy sip from Red Mountain Spa in St. George, Utah, delivers a serving of fruit and has only 64 calories:

Sparkling Melon Soup (Makes two servings, each with 96 mg of C.)

Chop half a ripe cantaloupe into 1-inch chunks. Blend with 1 tsp chopped fresh mint and 1 tbsp lime-flavored Perrier. Drop in 1/4 cup minced pineapple. Add 1/4 cup minced strawberries.