Want to be fit like Kate Middleton? Here's the top 5 worst celebrity diets to avoid

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Seeing celebrities and members of royalty such as Kate Middleton appear to lose weight in public can help inspire people to try out fad diets but not all diets should be followed. Here are the top five celebrity diets that are deemed odd or not safe.

1.    Urine therapy

As the name implies, followers of the diet drink their own urine. Hub Pages says some of the more well-known celebrities who have attempted this feat include boxer Juan Manuel Marquez, baseball player Moises Alou, "Man vs. Wild" host Bear Grylls, Madonna and Kesha.

According to the BDA Association of UK Dietitians, some people believe that urotherapy helps in reducing your chances of developing cancer. However, there are no studies which support the notion that drinking urine benefits the body.

2.    No sugar diet

Chron says the diet involves avoiding all foods that contain any form of sugar. Some of its more well-known supporters include Alec Baldwin and Tom Hanks.

The British Dietetic Association or the BDA says following this diet "is not only almost impossible but would mean eliminating foods like vegetables, fruit, dairy products, nuts -- leading to a less than healthy diet."

3.    Kale salad and chewing gum

Although this may sound like an odd combination of foods, Jake Gyllenhaal testifies that it has worked for him. Telegraph says the bizarre diet has helped him lose weight for his role in the movie 'Nightcrawler.'

Gyllenhaal later admitted that the diet took more than pounds of fat. "You're pretty hungry because you're not eating a lot of food," he said during an interview.

According to the BDA, "It's extreme, socially isolating, unbalanced, hard to sustain and potentially harmful."                                                     

4.    Clay cleanse diet

Followers of this diet eat a spoonful of clay a day. They believe that doing so will remove all of the toxins and negative isotopes in the body.

BDA says Zoe Kravitz is one celebrity who detoxes using the clay cleanse diet.

The Food Standards Agency warned the public about consuming foods that contain clay saying, 'We remind consumers, especially pregnant women, about the dangers of ingesting clay, clay-based detox drinks and supplements'.

5.    Breatharian diet

The Breatharian diet closely resembles the Air diet where followers pretend to eat imaginary food on a plate. Individuals gulp air in an attempt to feel full according to Web MD.

"You cannot live on fresh air alone," the BDA explains. "You would lose weight, but this would also be accompanied by dehydration, malnutrition and risk of death!"