Many of the old plans provide less than 1200 calories a day, which is not enough food for good health.

They can still provide 200 to 500 calories in a 24-ounce serving.

They provide 50 calories and 6 grams of fat per tablespoon.

Each provides 100 calories and 11 grams of fat per tablespoon.

Alcohol is not a nutrient, yet it also provides calories.

One large meal can provide more calories to the spider than dozens of small ones.

Enough grain is produced to provide everyone with ample protein and more than 3,000 calories per day.

Note: Vitamin supplements do not provide calories, which are essential for energy production.

Big Mac costs around £2.70 and provides 490 calories.

Designed to be used, if necessary, without boiling or other heating, the meals are supposed to provide at least 1,400 calories.