Is the ketogenic diet more effective for people with metabolic syndrome than a standard American diet with exercise? But dietitians say it may not be that simple. The researchers set out to discover if a sustained, controlled ketogenic diet would reduce the impact of metabolic syndrome as well as decrease the weight, body mass index (BMI), and body fat mass of study participants. They brought together a group of 30 adults who had been diagnosed with metabolic syndrome, a cluster of conditions that occur at the same time. The conditions can include high blood pressure, high blood sugar, excess body fat around the waistline, and abnormal cholesterol levels.
People with metabolic syndrome are at an increased risk of heart attack and stroke. The researchers randomly split participants into three groups. One group followed a sustained ketogenic diet with no exercise. Another undertook a standard U.S. diet with no exercise. The third followed a standard U.S. diet with 30 minutes of exercise for three to five days per week. At the end of the 10-week period, those in the ketogenic group saw the best results for reduction of weight, body fat percentage, and BMI.
The theory behind the keto diet
The ketogenic diet (sometimes called “keto”) is a low-carb, high-fat diet that involves drastically reducing the number of carbohydrates you eat and replacing them with fats. The body responds to this reduction by going into a state called ketosis. Carbohydrates are the main fuel our body was designed to use and the only fuel that the brain and heart muscles use. When we don’t eat enough carbohydrates, the body looks for other forms of energy to satisfy that role. Without carbs, our insulin levels drop and fat is released from our cells. The liver turns the fat into ketones, our body’s second choice for energy.
The keto diet has been used in medicine in conjunction with other therapies to help children with epilepsy. This is done under supervised conditions with a medical professional. Whether the diet can be used safely for weight loss, however, remains to be seen. The ketogenic diet appears to be safe in the short term (like this 10-week study). However, we don’t have much evidence that it’s safe in the long term, or sustainable.
Although the results of the study found that participants in the ketogenic group had the best results in terms of weight loss, Wright is quick to point out that this doesn’t necessarily mean this is a more effective weight loss method for this group. The greater weight loss resulted from a loss of water rather than body fat. Studies show us that the water weight comes back quickly, and often people experience a rebound weight gain in response to the deprivation from the diet and changes in the metabolic rate. It is body fat that increases health issues.
Here are some facts based on keto diet:
• According to a 2015 study, approximately 35 percent of all U.S. adults have metabolic syndrome. That increases to 50 percent for those 60 and over.
• One of the most important steps to preventing and treating metabolic syndrome is weight loss.
• A healthy diet combined with exercise helps with this. Experts say that metabolic syndrome occurs less often in those who are regularly engaging in some form of physical activity.
• The American Academy of Nutrition and Dietetics recommends a heart-healthy diet for those with metabolic syndrome, including a high intake of fruits and vegetables, low-fat or fat-free dairy, whole grains, seafood, and moderate amounts of lean meat, poultry, and oils.
• Reduction in carbohydrates is helpful for weight loss, but it doesn’t need to be as extreme as in the ketogenic group in the Bethel study.