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This article contains celebrity quotes about a diet that some readers may find triggering. If you need help with an eating disorder, the National Association of Anorexia Nervosa & Associated Disorders helpline 888-375-7767 is open Monday to Friday. 9 a.m. to 9 p.m. Central Time.

The ketogenic diet has become a trendy lifestyle choice due to its vaunted weight-loss claims and promise of better overall health and accelerated energy.

Keto’s popularity is not only due to its purported health benefits but also because of the Hollywood actors and celebrities who swear by the program.

Oscar-winning actress Halle Berry has been a proponent of the ketogenic diet for many years, crediting the plan with more energy and smoother skin. It even helps Berry manage her type 2 diabetes by reducing blood glucose levels.

Berry, known for her youthful appearance, has also said that the keto diet is “largely responsible for slowing down my aging process.”

The concept of the ketogenic diet is to increase fat intake in the form of healthy fats such as avocados, whole eggs, grass-fed beef, nuts, and many other high-fat foods. Simultaneously, one must reduce or eliminate carbs like rice, pasta, potatoes and bread.

The goal is to force the body into a state of “ketosis” where fats are burned for energy rather than carbohydrates. That said, staying in a state of ketosis can be demanding.

Hardcore keto followers stick to a strict ratio of 75% fats, 20% protein, and 5% or less of carbohydrates. There are various forms of keto including the targeted, cyclical and high-protein keto, but the 75-20-5% balance is often referred to as the standard ketogenic diet.

Regardless, the goal is the same: drastically reduce carbs while increasing healthy fats.

“The idea of it is you train your body to burn healthy fats, and so I eat healthy fats all day long,” Halle Berry said on Live! with Kelly and Ryan.

Matthew McConaughey reportedly got his shredded physique for Magic Mike through a ketogenic cycle combined with intensive weight training and cardio routines.

Vanessa Hudgens claims she lost the twenty pounds she gained for her gut-wrenching role in Gimme Shelter by adhering to the keto lifestyle.

“I think that we’ve been brainwashed to think that fat is bad, but really, it’s what’s going to make you feel fuller longer,” she says.

Transformers franchise star Megan Fox credits the ketogenic diet with her slim figure and healthy glow. “I cut out all the bread and those sorts of carbohydrates,” she told E! Online. “No crackers, no pretzels, no chips.”

Fox takes her commitment to a whole other level as she never allows herself a cheat day, comparing it to quitting smoking.

“I gave up smoking cold turkey. I’m one of those people–when I’m committed, there’s no stopping me,” she said. “So, I did it and after about a week, it repulses me. Like, there’s bread over there, and never again would I put that in my body.”

It’s important to keep in mind there are potential drawbacks to the ketogenic diet. Some people experience constipation or increases in their cholesterol levels, while those taking medication might need to have their dosage adjusted. If you’re thinking of trying the keto diet, be sure to check with your doctor first.

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