Fad Diet Facts
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Fad Diet Facts

From the Grapefruit Diet to the Master Cleanse, fad diets abound. See how well you know what to watch out for with this quiz

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Fad Diet Facts
Fad Diet Facts
Question 1 of 20 Correct

Which of the following is a danger of detox diets?

Correct! Sorry, that’s incorrect.

The correct answer is: All of the above. Many popular detox diets, especially those that involve extreme low-calorie fasting, can rob the body of important nutrients. Other downsides include dehydration, fatigue, dizziness, nausea and even colon damage.

Fad Diet Facts
Question 2 of 20 Correct

True or false: Detox diets can slow metabolism.

Correct! Sorry, that’s incorrect.

The correct answer is: This is true. Detox diets place the body in starvation mode, which actually slows your metabolism.

Fad Diet Facts
Question 3 of 20 Correct

Which diet is most effective for long-term weight loss?

Correct! Sorry, that’s incorrect.

The correct answer is: None of the above. Weight loss depends on the total number of calories you consume, regardless of whether they come from carbs, protein or fat.

Fad Diet Facts
Question 4 of 20 Correct

True or false: Drinking more water can help you lose weight.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. The only way to lose weight is to take in fewer calories than the body needs. Water can help, but only if it replaces high-calorie beverages.

Fad Diet Facts
Question 5 of 20 Correct

What do the cabbage soup, grapefruit and Hollywood cookie diets have in common?

Correct! Sorry, that’s incorrect.

The correct answer is: All of the above. Meal replacement diets may cause rapid weight loss, but they often fail to achieve long-term results.

Fad Diet Facts
Question 6 of 20 Correct

True or false: People who eat low-fat foods tend to gain more weight than people who eat moderate-fat foods.

Correct! Sorry, that’s incorrect.

The correct answer is: This is true. Low-fat doesn't mean low-calorie. Often, the fat has been replaced with sodium, sugars and carbohydrates -- which can make you put on more weight.

Fad Diet Facts
Question 7 of 20 Correct

How much weight should you lose each week on a healthy diet?

Correct! Sorry, that’s incorrect.

The correct answer is: You should aim to lose an average of 1/2 to 1 pound per week.

Fad Diet Facts
Question 8 of 20 Correct

Which of the following are clues that a fad diet is unhealthy?

Correct! Sorry, that’s incorrect.

The correct answer is: All of the above. If a diet sounds too good to be true, it probably is. Read informed reviews, and wait for other studies to confirm a diet's claims.

Fad Diet Facts
Question 9 of 20 Correct

Which of the following is a common side-effect of low-carb diets?

Correct! Sorry, that’s incorrect.

The correct answer is: All of the above can be negative side effects of low-carb diets.

Fad Diet Facts
Question 10 of 20 Correct

True or false: Diets that focus on lean protein, plant-derived fats and fruits and vegetables tend to improve heart health more than traditional low-fat diets.

Correct! Sorry, that’s incorrect.

The correct answer is: This is true. Research shows that diets that focus on lean protein, healthy plant-derived fats, fruit and vegetables tend to improve heart health even more than the traditional "low-fat" diet that was once prescribed.

Fad Diet Facts
Question 11 of 20 Correct

True or false: A detox diet is necessary for flushing out toxins from your body.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. You don't need detoxifying unless you've been poisoned. Your liver and kidneys do a great job of filtering out toxins. Any weight loss you do achieve is usually temporary.

Fad Diet Facts
Question 12 of 20 Correct

True or false: A colon cleanse will make your stomach feel flatter.

Correct! Sorry, that’s incorrect.

The correct answer is: True, but only temporarily. Colon cleansing diets have not been shown to reduce abdominal fat at all.

Fad Diet Facts
Question 13 of 20 Correct

True or false: Caffeine can help you lose weight substantially.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. A few studies have shown that caffeine may boost weight loss slightly or prevent weight gain. However, none of the weight loss was permanent or in significant amounts.

Fad Diet Facts
Question 14 of 20 Correct

How do meal replacement shakes help with weight loss?

Correct! Sorry, that’s incorrect.

The correct answer is: Meal replacement shakes can help you lose weight because they are portion- and calorie-controlled. The downside is that most people get bored and eventually want to go back to the world of chewing.

Fad Diet Facts
Question 15 of 20 Correct

True or false: Eating negative calorie foods -- foods that take more calories to eat than they contain -- can help with weight loss.

Correct! Sorry, that’s incorrect.

The correct answer is: This is false. Eating does burn calories, but not enough to negate the calories the food contains.

Fad Diet Facts
Question 16 of 20 Correct

True or false: In extreme cases, doctors will sometimes recommend fasting to lose weight.

Correct! Sorry, that’s incorrect.

The correct answer is: This is true, but only when done with close supervision, and only in extreme cases. If not monitored properly, fasting can be very serious and even life-threatening. NEVER try fasting on your own to lose weight.

Fad Diet Facts
Question 17 of 20 Correct

Why does fasting prevent weight loss for most people?

Correct! Sorry, that’s incorrect.

The correct answer is: All of the above. People who go on extreme fasts and extremely low-calorie diets often don't lose the weight they expected to because the body protects itself from extreme starvation.

Fad Diet Facts
Question 18 of 20 Correct

What are some side effects of a single-food diet?

Correct! Sorry, that’s incorrect.

The correct answer is: All of the above. Single food diets can also dehydrate and deprive you of important nutrients.

Fad Diet Facts
Question 19 of 20 Correct

How many calories does the average woman need each day?

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The correct answer is: The typical adult woman needs 1,500 to 2,000 calories each day to maintain her body weight, compared to the average adult man, who needs 2,000 to 3,000 calories a day to maintain body weight.

Fad Diet Facts
Question 20 of 20 Correct

What happens when you lose weight without exercise?

Correct! Sorry, that’s incorrect.

The correct answer is: When you lose weight without exercise, you lose both muscle and fat; when you gain weight without exercise, you gain only fat. That's why yo-yo dieting fails -- when you continually gain and lose weight, you end up putting on even more fat, which becomes all the more difficult to lose.

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