From: Bradkid on
The foods, which utilize more calories to digest than the calorie
foods in fact have, are known as negative calorie foods. It is harder
for the body to consume calories from these negative calorie foods. I
mean to say that our body has to work hard in order to take out
calories from these foods. With this kind of food very small amount of
calorie actually turn in to fat, as there is very small amount of
calorie available.

You will get the maximum benefit of negative calorie foods when you
take them alone without any junk food. There are large number of
fruits and vegetables, which are having negative calorie results. Some
of these foods are Raspberry, papaya, strawberry, zucchini, Carrot,
Beets, and Asparagus.

Here is the complete listing of Negative calorie foods

Fruits


* Apple

* Cantaloupe

* Honeydew

* Grapefruit

* Blueberries

* Mango

* Papaya

* Peach

* Lemon/Lime

* Orange

* Pineapple

* Raspberry

* Strawberry

* Tomato

* Tangerine

* Turnip

* Watermelon


Vegetables


* Asparagus

* Beet Root

* Broccoli

* Cabbage

* Carrot

* Cauliflower

* Celery

* Chicory

* Hot Chili

* Cucumber

* Garden cress

* Garlic

* Green Beans

* Lettuce

* Onion

* Radish

* Spinach

* Turnip

* Zucchini


So you should go for negative calorie foods in order to lose weight in
your daily routine.

Via - http://fast-weightloss.blogspot.com/2006/09/lose-weight-with-negative-calorie.html