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Kourtney Kardashian,Megan Fox,Gwyneth Paltrow and Halle Berry have all tried and tested the keto [short for ketogenic] diet – and they’re certainly not alone. It ranks as the biggest diet trend of 2020 with a whopping 25,434,000 daily Google searches!

Intermittent fasting, endorsed by reality star Zara McDermott and actress Jennifer Aniston, follows in second place this year with 11,700,000 searches to its name every day.

In at number three according to the research commissioned by, is paleo, with 3,834,000 daily searches, Gwyneth Paltrow is also an advocate of.

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So what do these diets entail? Here's everything you need to know…

The Keto diet

This diet is high in fat and low in carbs and forces the body to burn fats instead of carbohydrates. The idea is to get the liver to produce ketones, which is a type of chemical your body produces to break down fats, for the body to use as energy.

Ketones are a by-product that occur when the body breaks down fat for fuel as a result of a low carbohydrate intake.

Although it means carbs are limited, healthy fat consumption goes up, so olive oil, coconut oil, nuts and seed are all on the menu.

Non-starchy green vegetables, like broccoli, courgette, asparagus and cucumber are also good to go. For protein sources, organic, pasture-raised and grass-fed meats are recommended where possible

Kourtney Kardashian previously spoke about keeping her body in a constant state of ketosis.

She said: “My doctor said one of the fastest ways to detox metals is to try to keep my body in a state of ketosis, which occurs when the glycogen in your liver is depleted and the body burns fatty acids for energy. To do this, I stick to a low-carb diet, with high proteins and healthy fats, and I eat 3 meals a day—with no snacking in between.”

Halle Berry has previously commented on it too, as she said: “I eat healthy fats all day long, avocado, oil, coconut oil and I use butter, but don’t have any sugar. So when your body gets trained to burn fats, it’s constantly on fat-burning mode — that’s the secret”.

Intermittent fasting

This is a fairly straight forward eating pattern that swings, as its name suggests, between fasting and eating.

Made In Chelsea star Zara McDermott revealed her plans to give it a go for a week in May and Frankie Essex has also tried it, as has A-lister Beyonce.

UK singer Ellie Goulding will fast for up to 40 hours to “reduce inflammation” but says she does so safely following medical advice.

She explained: “I do it very safely by having a purposefully nutritious food day the day before and after. On the fast day, I drink high-grade electrolytes and a lot of water.”

Jennifer Aniston, meanwhile, cuts out solid foods before lunch if she’s following the regime, explaining, “I do intermittent fasting, so there’s no food in the morning.”

Scarlett Johansson is another ‘fan of the fast’ and did so for around 12 hours a day while training for her Avengers role as Black Widow. “That was a general guideline—at moments we pushed beyond that to 14-15 hours depending on the filming schedule,” says her trainer Eric Johnson.

The paleo diet

This is a ‘back to basics’ dietary plan based on food eaten by those during the Palaeolithic era. The reason for this is because hunter-gatherers are presumed to have lived with lower rates of lifestyle disease, obesity and diabetes.

So it involves sticking to unprocessed foods, high in protein, low in carbohydrates. Plenty of fruit and vegetables are encourage but dairy products should be limited.

Like Gwyneth Paltrow, fellow actress Jessica Biel credits the diet for keeping her healthy and says, “eating Paleo just leans you down and slims you up and takes that little layer of fat and water-weight right off your body.”

She adds, “I do a lot of cooking at home using fresh fish or lean meat like chicken and vegetables.”

Please consult a healthcare professional before undertaking any kind of restrictive eating schedule.

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