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Con: Impaired Functioning of Organs

"Typically, the body's main source of energy comes from glucose, which is a sugar that is metabolized from the digestion of carbohydrates," says Lorraine Kearney, holistic nutritionist. Glucose is the main source of fuel for the brain, nervous system, red blood cells, and certain bodily tissues - and carbohydrates are a key source of glucose.

"Without adequate glucose sources in the diet, the body must change the way it burns energy so that it can function. Low-carb, high-fat, and high-protein diets cause a shift in glucose metabolism and the body begins to rely on partially broken-down products of fat, called ketone bodies, as fuel," Kearney explains. "If just the right amount of calories from carbohydrates are consumed, the body prevents the breaking down of protein into amino acids for energy (i.e., ketones) to maintain optimum functioning of vital organs, such as the liver and kidneys."

However, people on the keto diet run the risk of not having enough glucose in their bodies due to the diet's restriction of carbohydrates. When this happens, Kearney says that the body will begin to take protein from the muscles. "This will decrease the building, repair, and functioning of the body and its vital organs, such as the heart, lungs, liver, and kidneys," she explains.

Is the Keto Diet Good or Bad? We Weigh the Pros and Cons

There's no denying that the keto diet, which is high in fat, moderate in protein, and low in carbs, is the trendiest diet of the moment. People are raving about how it's helped them lose weight and transform their lives, all while eating bacon and cheese.

Still, the keto diet is pretty controversial. Some dietitians warn that the increased amount of saturated fat is dangerous for heart health while others insist carbs are essential for weight loss and overall health. So what's the verdict on the keto diet?

We spoke to doctors and dietitians to weigh the pros and cons of this popular way of eating. Read on to find out if the keto diet is right for you.

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The 5 Biggest Myths About the Keto Diet, Debunked by a Doctor