7 Common Diet Myths Uncovered

It's more expensive to eat healthy food.
With a little planning, eating healthy foods can actually cost less than shelling out for typical fast-food fare. Are you surprised? A study at the Mary Imogene Bassett Research Institute in Cooperstown, N.Y., found that a person who follows a diet of heart healthy whole foods can reduce her grocery bill by up to $8 a week. That translates to an annual savings of $416 a year for a single person.

Pound for pound, a balanced healthy diet with health-boosting whole foods is a lot cheaper than a fast-food diet. To help pare down your grocery bill, swap legumes for meat products; buy less-expensive produce such as apples, oranges, carrots, spinach and cabbage; and purchase healthy whole grains like oatmeal and rice in bulk.

Certain diets can banish cellulite.
Medically speaking, there is no such thing as cellulite. It's a marketing term for plain old pudge that ripples (mostly on the thighs) in varying degrees in 50 to 90 percent of women, regardless of clothing size or fitness level. This clumpy fat results from fat cells stored just under the skin in honeycomb-like structures held in place by bands of connective tissue. The more fat cells stuffed into each honeycomb, the more puckered the texture.

Since cellulite is just ordinary body fat, there is no unique low carb diet trick or cellulite treatment to remove it. The bottom line? A calorie-controlled diet that consists of whole, healthy foods plus exercise will help you lose fat throughout your body.

When you work out you need extra protein in your diet. 
Even if you exercise regularly, you don't need any more protein than the average couch potato! Most Americans consume more than enough protein, averaging 77.5 grams a day, or 146 percent of the Dietary Reference Intake (53 grams) for a 145-pound adult.

You need fat in your diet. Fat keeps you full and satisfied.
Fat is the slowest food component to clear the stomach, so for years it was assumed that fatty foods slow digestion and keep you feeling full longer. Recent research proves the proportion of sugar and fat has little or no difference in satiety ratings. What's more, fat actually has twice the calories of protein or carbohydrates.

In reality, protein tends to leave people feeling more satisfied than either carbohydrates or fat while fiber and whole grains affect feelings of fullness and satisfaction. To stay full longer, eat healthy foods that are high in fiber, like fruits and veggies and lots of healthy whole grains.

Find more stories like this on diets, fitness, healthy eating and recipes at Shape.com

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