A calorie is a unit of energy needed to raise the temperature of one gram of water by one degree Celcius. This calorie is often written with a small c as opposed to the kilocalorie which is the more commonly used measure often written with the big or capital C or Kcal. When people refer to calories in food, they often mean calories but may just say calories meaning the kilocalories.
A calorie is commonly used measure of food energy. An average person might need about 2000-2500 calories a day to give an example. When one is trying to lose weight, the goal is to under cut the calories so the body has to burn excess fat to help in losing weight.
Also visit glycemic index of foods.
List of high calorie foods to avoid
1. Corn and high fructose corn syrup products
2. Alcoholic beverages
3.Butter, lard, dripping or similar fat (used as a spread or in baking/cooking etc.)
6. Refined grains
10.Cream (including creme fraiche)
11.Crisps (including vegetable crisps)
14.Drinking Chocolate, Milo etc.
16. Flavored milk/milk shakes
17.Fruit tinned in syrup
20.Fruit juice (except tomato juice and unsweetened blackcurrant juice)
22.High fat crackers
31.Nuts roasted in fat or oil
34.Popcorn with butter or oil
37.Regular luncheon sausage
38.Regular powdered drinks
41.Regular soft drinks
44.Sugar (added to anything including drinks, baking, cooking etc.)
46.Syrups such as golden syrup, treacle, maple syrup
47.Toasted muesli and any other breakfast cereal with more than 15g sugar per 100g cereal
49.Yoghurt type products with more than 10g sugar per 100g yoghurt
50. Crackers and biscuts
Any high glycemic or high fat foods should be avoided and instead choose lean protein and fiber based foods.
W8MD's 52 weeks of weight loss videos - cereal grains
Some common food items and their calories
Hamburger patty labeled 'extra lean', the word 'or', and a hamburger patty labeled 'regular'. Hamburger patty, 4 oz. precooked, extra lean ground beef 167 calories
Hamburger patty, 4 oz. precooked, regular ground beef 235 calories
an apple, the word 'or', and a slice of apple pie Large apple, 8 oz. 110 calories
Apple pie, eighth of a 2-crust 9" pie 356 calories
two slices of bread, the word 'or', and a croissant Two slices of 100% whole wheat bread, 1 oz. each 138 calories
Medium croissant, 2 oz. 231 calories
a baked potato with sour cream, the word 'or', and some french fries Medium baked potato with peel, 2 tablespoons low-fat sour cream 203 calories
French fries, one medium fast-food order 457 calories
a cooked chicken breast, the word 'or', and some chicken wings Roasted chicken breast, skinless (3 oz.) 141 calories
Fried chicken wings with skin and batter, (3 oz.) 479 calories
Also see Calorie checker
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