It seems people have been looking for the perfect diet since the first chunky caveman.

Nowadays every week seems to bring word of some new fad that a friend of a friend swears by or some regimen the hot celebrity du jour is rumored to be using to get into bikini shape.
Diet fiends have jumped on so many bandwagons and get-fit-fast diet plans that it's amazing they can even keep track of them all.
So far, nobody has found the perfect diet. They have, however, happily filled their bodies and minds with countless bad diets on their endless quest.

Some diets are disgusting, some are so counterintuitive that it's a wonder they even became fads and some just stink -- literally.
Maybe the perfect diet doesn't exist, but these five diet nightmares are a good place not to start ...

Steaks on barbecue grill

No. 5: The Atkins diet

Everyone has heard of the Atkins diet, and despite its popularity doctors and dieters have a laundry list of horror stories.

Any diet that lets you eat bacon all day sounds great, but does it really sound healthy?

The Atkins diet essentially turns the longstanding food pyramid on its head, favoring fatty meat and slashing carbs, something doctors fervently warn their patients not to do.

Atkins begins with dramatically changing how your body works by putting it in a state called ketosis; which has been linked to chronic dehydration, nausea, depression and bad breath. Such high-protein diets are also very dangerous for people with high blood pressure, heart disease and kidney ailments.
Doctors say eating a diet so high in protein can also cause gout and an increased risk of cancer.

While some dieters report great results, many Atkins dieters also gain all those lost pounds back soon after the bacon-and-beef party ends.

orange juice in glass

No. 4: Juice detox/fasting diets

The juice detox and juice fasting diets became all the rage among raw food fans and people looking to get the "toxins" of everyday life out of their body.

These diets come in many forms: fruit juices, juiced veggies and even cayenne pepper juice and molasses.

The idea behind the diets is that the body digests juice with little effort and wipes the slate clean, so to speak. Dieters use juice fasting beyond just losing weight, they also look to it to quit smoking, drinking caffeine or for an alternative to normal medical procedures.

Dieters have, however, reported many problems with the diet. Acne breakouts, extreme irritability, fatigue and the leaching of calcium and other nutrients crucial to a healthy body have all been reported by dieters who try juice fasting.

cabbage vegetables closeup

No. 3: The cabbage soup diet

The cabbage soup diet is one diet that literally stinks, first from the soup and later from the flatulence many dieters have reported.

The basis of the diet is eating huge quantities of cabbage soup -- hence the name. The low-calorie soup diet typically lasts for seven days. During that time, the cabbage soup is paired with sides such as several bananas, unsweetened fruit juice and beef.