Calories, protein, carbohydrates and fat: how much do I need?

Not sure you're getting enough? Pretty sure you're getting too much? Use this crib sheet to help you improve your nutrition by ensuring you're getting the right amount of calories, protein, carbs and fat.

By Cara Rosenbloom, RD

Calories, protein and carbohydrates
Track your daily calorie, protein, carbohydrate and fat intake using our online Food Journal.

Just like your car, your body needs fuel. But how much and what kind?

Calories
Calories provide energy to the body. Your daily calorie requirements depend on your age, gender, height, weight and exercise level.

The average Canadian woman requires 1,500 to 2,200 calories each day, with about 1,800 calories being the norm.  

If you're trying to lose weight, pay attention to your calorie intake. If you eat more calories than your body needs, you'll gain weight. Eat fewer calories than required and you will lose weight.

Calories come from protein, carbohydrates and fat.

Protein
You need to get 10 to 35 per cent of your calories from protein. This means you'll need roughly 50 to 145 grams of protein each day.

Protein requirements are based on body weight. To figure out the minimum amount of protein you need, multiply 0.8 grams of protein by your weight in kilograms. (If you don't know your weight in kilograms, find it by dividing your weight in pounds by 2.2).

Getting enough protein each day is easy. A 75 gram serving of meat, chicken or fish has about 18-22 grams of protein. A cup of milk, a 50 g serving of cheese or ¾ cup of beans has 10 grams. Vegetables, fruit and grains also have protein. It all adds up to help you meet your daily needs.

Carbohydrates
The average 1,800-calorie diet should contain between 210 and 290 grams of carbohydrates each day, which is equal to 45 to 65 per cent of your daily calories.

Many people are surprised to learn that the need for carbohydrates is so high – it's about half of your daily calories! Since carbohydrates are the main source of energy for the body and brain, they are an important component of a healthy diet. If you've tried a low-carb diet and felt lethargic or your thinking felt a little 'fuzzy', you've felt the effects of low carbohydrate intake.

Carbohydrates are not technically essential to your diet since the body can make fuel from fat and protein. However, removing carb-rich foods will limit your meal selection and could result in fibre, vitamin and mineral deficiencies. While there is no doubt that low-carb diets can help with weight loss, studies show that low-fat diets are equally effective.

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