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RankedFacts.com > Blog > Lifestyle > Wellness > 10 Wildly Failed Fad Diets You Won’t Believe
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10 Wildly Failed Fad Diets You Won’t Believe

RankedFacts Team
Last updated: August 4, 2025 7:42 pm
RankedFacts Team
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10 Wildly Failed Fad Diets You Won't Believe
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Let’s face it: in today’s world, looks matter. Many people feel intense pressure to be attractive, and those considered attractive often seem to have an easier time. This can lead to a constant struggle to achieve an ideal body image, pushing many to resort to quick fixes and fad diets. These diets, often promoted by pseudo-scientists and entrepreneurs, promise rapid results but frequently fall short and can even be harmful.

Contents
TapewormsThe Clay DietFletcher ChewingThe Baby Food DietDr. Siegal’s Cookie DietThe Cabbage Soup DietAlkaline DietsThe Cotton Ball DietThe Breatharian DietThe Master Cleanse (and any cleanse)

Diet fads come and go, but they usually share a few common traits: shaky science, questionable results, and profiteering motives. Let’s explore ten failed diet fads that have endangered the health and dignity of those who tried them.

Tapeworms

The Tapeworm Diet: The Bad, the Ugly, and the Gross

The idea of using tapeworms to lose weight has been around for a long time. Tapeworms are parasites that attach themselves to the inside of your intestine and steal nutrients from your food. The thought was that by swallowing a tapeworm, it would eat some of your food, causing you to digest fewer calories and lose weight. But it doesn’t quite work that way.

There are thousands of tapeworm species, and many won’t even use humans as hosts. The ones that do can cause malnutrition, diarrhea, and anemia by consuming too many nutrients. Even if you find a tapeworm that consumes just the right amount of calories, it or its offspring might leave your gut and infect other parts of your body, leading to health problems. This dangerous fad is losing popularity, and for good reason.

The Clay Diet

People Try Shailene Woodley’s GROSS Clay Diet (Totally Clevver)

The clay diet gained popularity thanks to endorsements from actresses Shailene Woodley and Zoe Kravitz. This diet involves eating bentonite clay, a volcanic ash known for its absorbency. The idea is that the clay binds to unwanted chemicals in your body, helping you eliminate them when you poop.

However, bentonite clay absorbs everything, including the nutrients your body needs. It swells up in your gut, causing bloating and potentially perforating your bowels. Eating dirt is never a good idea, no matter who suggests it.

Fletcher Chewing

10 CRAZIEST Diet Trends EVER

Horace Fletcher, a non-doctor from the 1800s, created a system to combat his own obesity by chewing food more. “Fletcherism” involves chewing every bite at least 100 times. Fletcher claimed the diet worked regardless of what you ate, so even a gallon of ice cream was fine as long as it was chewed thoroughly. Despite lacking common sense and scientific evidence, this idea has persisted.

The Baby Food Diet

Baby Food Diet: Good or Bad Idea?

The baby food diet involves replacing one or two meals a day with baby food. The logic is that baby food is nutritious and low in calories. While it’s true that baby food contains essential nutrients and fewer calories, replacing meals with it can lead to starvation.

Baby food containers typically have 75-100 calories. Replacing a large portion of your meals with only 150-200 calories will indeed cause weight loss, but through starvation, which can remove muscle and bone mass and harm your health. This fad was popularized by celebrities like Gwyneth Paltrow.

Dr. Siegal’s Cookie Diet

"Influencers" Caught Promoting The WORST Diet (The Cookie Diet)

This diet promises weight loss through cookies, but it’s not as appealing as it sounds. The “cookies” are more like fiber-bar/muffin hybrids that lack the taste and texture of actual cookies. They are mainly fiber and protein, requiring a daily multivitamin to supplement the missing nutrients.

The diet also requires a full meal of meats, fruits, and vegetables each day, defeating the purpose of a cookie-only diet. Additionally, it can cost around $69.99 per week, totaling $3,640 per year for fiber bars, on top of your regular grocery expenses.

The Cabbage Soup Diet

The Cabbage Soup Diet: A Good Way to Lose 10 Pounds in a Week?

This diet involves eating only cabbage soup, as much as you want. Any diet that restricts you to a single food is generally unhealthy. No single food can provide all the nutrients needed for a healthy existence. The American Heart Association has listed numerous health issues associated with the cabbage soup diet. For good reason, it has lost popularity.

Alkaline Diets

Alkaline Dieting | The Truth about PH Diets

Scrolling through comments about the wonders of “alkaline foods” reveals a nightmare of pseudoscience and anecdotal evidence claiming it works. There is no scientific support for the idea that alkaline foods promote weight loss or prevent diseases like cancer.

The diet’s only benefit is that many highly acidic foods are processed, fatty, and alcoholic. Cutting these foods will improve your health and lead to weight loss, but not because of alkalinity. It’s simply because eating fewer unhealthy foods and more healthy foods is beneficial.

The Cotton Ball Diet

A Cotton Ball Eating Diet?

Eating cotton balls can be deadly. This trend emerged in the modeling industry, where extreme societal pressures led to desperate measures. Eating cotton balls was believed to create a feeling of fullness without adding calories. However, cotton balls are non-food items and should never be consumed. Though reports of this diet have decreased, the hope is that the fad has died out completely.

The Breatharian Diet

The Strange World of Breatharianism

You cannot sustain yourself by simply breathing. Air is not a substitute for food. People claiming to have survived years without food, only through breathing, are not telling the truth.

These individuals often profit from making sensational claims, encouraging people to spend money on their teachings. It’s important to recognize that proper nourishment comes from eating healthy food, not from breathing alone.

The Master Cleanse (and any cleanse)

If Juice Cleanse Ads Were Honest (Detox, Master Cleanse)

This diet remains popular but consistently fails to produce lasting results. The master cleanse involves drinking only lemon juice, maple syrup, cayenne pepper, and water. It became popular after Beyoncé supposedly used it effectively. However, like most fad diets, the results are temporary or come at a significant cost to your health.

Most cleanses attempt to ‘detox’ the body by removing ‘toxins.’ However, the term toxin is often misused. Many molecules can be harmful, but our livers and kidneys naturally filter them out when they are at normal levels. The most effective way to support these organs is to eat a balanced diet, get adequate sleep, manage stress, and exercise regularly.

In conclusion, fad diets often promise quick and easy weight loss but usually fail to deliver lasting results and can even be harmful. Focus on sustainable, healthy habits, including balanced nutrition and regular exercise, to achieve long-term well-being.

What are your thoughts on these failed fad diets? Leave your comment below!

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