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Kourtney Kardashian -

The eldest Kardashian sister is one of the best known promoters of keto. She was initially put on the diet in 2017 after doctors found high levels of mercury and lead in her body.

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Kourtney Kardashian -

She has called keto a "really positive experience for me," and wrote on her blog, "I would make broccoli rice or cauliflower rice to at least feel like I was eating some carbs."

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Kim Kardashian -

The middle Kardashian sister is also a fan of the low-carb lifestyle. She may not have been on keto per se, but according to a 2016 People article, she has spent time on the Atkins 40 diet.

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Kim Kardashian -

Atkins is the original keto—it involves very limited carbs and lots of fat. Atkins 40 is the version designed for people with less than 40 lbs to lose, although Kim apparently lost 60 lbs.

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Gwyneth Paltrow -

According to a 2017 story in Bravo, actress and businesswoman Gwyneth Paltrow is keen on keto. The diet has considerably more scientific backing than some of her other health pursuits.

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Gwyneth Paltrow -

Paltrow's wellness lifestyle brand Goop has been called out for selling strange health products over the years, including things like stickers to relieve anxiety.  

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LeBron James -

In the summer of 2014 LeBron James set about slimming down. When he posted some pics of his new frame to Instagram, many news sources cited keto as the reason for his chiselled abs.

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LeBron James -

In September 2014 James told Sports Illustrated that he didn't eat any dairy, sugar, or carbohydrates for 67 days. Apparently he wanted to "test his mental fortitude."

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Megan Fox -

In August 2014 actress Megan Fox told E! that she had cut out bread and carbs, including chips, pretzels, and crackers. It was apparently a bid to get her pre-baby body back.

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Megan Fox -

The 'Transformers' actress told E!: "I don’t eat anything fun." At one point she said that the worst thing that she would consume in the day would be coffee.

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Kelly Ripa -

Co-host of 'Live with Kelly and Ryan,' Kelly Ripa doesn't think much of the keto diet, or in fact diets in general. This is in spite of the fact her husband is a huge keto advocate.

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Kelly Ripa -

In 2019 she told Bon Appetit: "I just don’t have that level of discipline. Mark says that I’m carb-o, because I always eat his bun if he gets a burger. And the fries."

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Jenna Jameson -

In August 2018 former 'Big Brother' contestant Jenna Jameson posted a comparison picture to Instagram showing herself before and after giving birth to her then 17-month old.

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Jenna Jameson -

She credited the keto diet and intermittent fasting with her ability to drop a whopping 63 lbs. Safe to say Jameson is a fan of keto, and of her own hard work and dedication, of course!

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Savannah Guthrie -

At one point Savannah Guthrie, co-host of 'Today,' went keto for seven weeks. However, she revealed on 'Watch What Happens Live with Andy Cohen' that she didn't lose any weight.

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Savannah Guthrie -

The TV personality revealed: "It's not even doing anything. I haven’t lost anything! I haven’t lost a thing. But you know, I’ve eaten a lot of bacon and I’ve liked it."

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Halle Berry -

In 2018 actress Halle Berry told People that she was a good candidate for keto because she is a big meat eater and doesn't fill up on pasta or anything with added sugar.

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Halle Berry -

Instead she prefers to fill her plate with healthy fats, such as avocado, coconut oil, and butter. The 'X-Men' actress apparently really likes the keto diet.

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Vanessa Hudgens -

In 2017 former Disney star Vanessa Hudgens shed 20 lbs. Apparently it was her keto diet plan (as well as a serious SoulCycle exercise routine) that made it possible.

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Vanessa Hudgens -

When the actress spoke to People in April 2017 about dieting, she said that her advice would be to view food simply as fuel and not to obsess about counting calories.

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Tamra Judge -

Star of 'Real Housewives of Orange County' Tamra Judge isn't a fan of keto: she tried it once but had to quit after one month because she was experiencing symptoms of "keto flu."

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Katie Couric -

Former host of the 'Today Show' Katie Couric also suffered from "keto flu" but it wasn't a dealbreaker for her. In 2018 she took to Instagram to sing the diet's praises.

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Ree Drummond -

TV personality Ree Drummond spoke to People in 2019 about her experience with keto. She said: "Last summer, I kind of dove into the keto [diet] world and enjoyed it."

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Jillian Michaels -

Celebrity trainer Jillian Michaels thinks keto is a really bad idea. In a video for Women's Health she said: "I don’t understand. Like, why would anyone think this is a good idea?"

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Mama June -

Mama June used keto to help shed surgery weight. Speaking of the diet she said: "It’s not that bad. It’s like, cheese, eggs, protein, meat. And you honestly lose weight with that."

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Mark Consuelos -

Actor Mark Consuelos is well into keto, much to his wife Kelly Ripa's enjoyment. As we understand it, he eats all the non-carb elements of the meal and she all the carb parts.

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Al Roker -

The 'Today Show' meteorologist once said that he had lost 10 lbs in two weeks thanks to the keto diet. He did tell People that it was tough not eating bread, however.

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Alicia Vikander -

Actress Alicia Vikander's trainer put her on keto ahead of her starring role in 'Tomb Raider' (2018). She apparently ate a lot of fish and seafood for protein.

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Vinny Guadagnino -

Vinny Guadagnino, who starred in 'Jersey Shore,' created an Instagram account dedicated to his keto journey. He thinks it's a great way to lose weight, by all accounts.

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Tim Tebow -

In 2017 former NFL star talked to GQ about his keto diet and the importance of avocados. He said: "I have to take in a lot of fat, and the number one fat comes from avocados."

Sources: (People) (Everyday Health)

See also: The warrior diet: Could you stomach it?

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