What the expert says: ‘Like with atkins, you will lose weight quickly. The ketogenic diet is used in medicine, but under strict supervision and for set periods of time, so with appropriate support it can be safe in the short to medium term. The brain does use glucose as its fuel of choice, so ‘brain fog’ lethargy are common side effects. You’ll known when your body is running off ketones by your breath – it’s known as ‘keto breath’, and it’s bad. It also can affect your ability to exercise by due to a lack of quickly accessible energy.

A 2012 study also showed that people on a low-carb diet burned 300 more calories a day – while resting! According to one of the Harvard professors behind the study this advantage “would equal the number of calories typically burned in an hour of moderate-intensity physical activity”. Imagine that: an entire bonus hour of exercise every day, without actually exercising. A later, even larger and more carefully conducted study confirmed the effect, with different groups of people on low-carb diets burning an average of between 200 and almost 500 extra calories per day.

2. A strong, healthy heart. Eating Mediterranean decreases practically every heart-disease risk factor -- high blood pressure, cholesterol, and triglyceride levels. When 605 patients who'd had a first heart attack followed the diet for four years, they had a 50 to 70 percent lower risk of having a second heart attack, angina, or a stroke or pulmonary embolism. "There's no single aspect of the diet that keeps your heart healthy," says Dr. Stampfer; it's the synergy of all the diet's elements. Antioxidants in fruits, vegetables, and beans help prevent the atherosclerosis that can make plaque build up in arteries. Omega-3 fatty acids in fish lower blood pressure, arrhythmia risk, and triglyceride levels. Olive oil lessens LDL ("bad") cholesterol. And wine and other spirits in moderation may lower heart-disease risk.
WY conceived, designed, and coordinated the study; participated in data collection; performed statistical analysis; and drafted the manuscript. MF assisted with study design, performed data collection, and helped to draft the manuscript. AC analyzed the food records. MV assisted with study/intervention design and safety monitoring. EW participated in the conception and design of the study, and assisted with the statistical analysis. All authors read and approved the final manuscript.
“So many of us sacrifice this for work, family, or social experiences, but sleep is a basic tenet of health; you will not function properly, cognitively or physically, without adequate sleep,” Moreno explains. "Adequate usually means at least 8 hours. Set strict sleep time rules and practice good sleep hygiene. When you prioritize sleep, other aspects of good health may line up more easily.”

On a ketogenic diet, your entire body switches its fuel supply to run mostly on fat, burning fat 24-7. When insulin levels become very low, fat burning can increase dramatically. It becomes easier to access your fat stores to burn them off. This is great if you’re trying to lose weight, but there are also other less obvious benefits, such as less hunger and a steady supply of energy. This may help keep you alert and focused.