Madeleine Hull
The ketogenic diet has become an increasingly popular approach to weight loss. However, doctors worry that this high-fat, low-carbohydrate diet may cause an uptick in non-alcoholic fatty liver disease (NAFLD). NAFLD is a silent killer, with few early symptoms, but it can lead to serious health issues such as cirrhosis and liver cancer. While weight loss is the main treatment for NAFLD, some studies suggest that the keto diet can help prevent and reverse fatty liver damage, although more research is needed.
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What You'll Learn
Keto can cause non-alcoholic fatty liver disease
The ketogenic diet has become a popular weight-loss approach. It is a high-fat, low-carb, moderate-protein diet that produces metabolic changes similar to those seen in a state of starvation. While the keto diet is an effective way to lose weight, some doctors worry that it might worsen an increasingly common condition called non-alcoholic fatty liver disease (NAFLD). In NAFLD, extra fat builds up in the liver, which can lead to serious consequences like cirrhosis and liver cancer.
A 2018 study evaluated the effects of carbohydrate-restricted induced ketosis in 262 obese or overweight patients. After one year, participants had improved blood sugar parameters, reduced cardiovascular risk factors, and reduced the need for medications to manage high blood pressure and diabetes. Liver enzymes (ALT) used to measure liver health also improved in this trial. Another noteworthy result was a reduction in the diabetes lab test HbA1c, which related to improved liver enzyme levels regardless of weight loss. This highlights the role insulin sensitivity and blood glucose management can play in reducing the risk and worsening of fatty liver.
However, animal studies suggest that the keto diet can cause NAFLD and raise liver enzyme levels. A high-fat diet can cause fat to build up in the liver, leading to fatty liver disease. Additionally, the keto diet has been reported to induce hepatic insulin resistance and steatosis in animal model systems. One case study discussed a 57-year-old woman with obesity who presented for follow-up on weight management. She had recently introduced a ketogenic diet and laboratory values revealed acutely worsened hyperlipidemia and elevated liver enzymes. An abdominal ultrasound showed results suggestive of non-alcoholic fatty liver disease. Discontinuation of the diet resulted in a modest reduction of low-density lipoprotein cholesterol (LDL-C) and liver enzymes two weeks later.
While the keto diet may offer benefits for weight loss and managing fatty liver disease, it is important to note that it can also have potential negative effects. Experts suggest that it should be followed for no more than 6 to 12 months and with regular monitoring. If you have an eating disorder, diabetes, or liver or kidney disease, it is important to talk to your doctor before starting the keto diet.
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Keto can increase cholesterol and liver enzymes
The keto diet is a high-fat, low-carb, moderate-protein diet that was originally developed to treat refractory epilepsy in infants and children under medical supervision. In recent years, it has become a popular weight-loss strategy. However, concerns have been raised about its potential negative effects, including its impact on cholesterol and liver health.
Keto and Cholesterol
The keto diet can lead to elevated cholesterol levels, particularly low-density lipoprotein cholesterol (LDL-C), which is associated with an increased risk of cardiovascular disease. This increase in cholesterol may be due to the high-fat content of the keto diet, as fats are a major source of cholesterol.
Keto and Liver Enzymes
There is evidence that the keto diet can increase liver enzymes, specifically ALT and AST. Elevated liver enzymes can indicate potential liver damage or inflammation. However, in some cases, the keto diet has been found to improve liver enzyme levels, particularly in individuals with fatty liver disease.
Keto and Fatty Liver Disease
There are mixed findings regarding the impact of the keto diet on fatty liver disease. Some studies suggest that the high-fat content of the keto diet can contribute to the development or worsening of non-alcoholic fatty liver disease (NAFLD). This is because the breakdown of fat can lead to the build-up of fat in the liver, which can cause inflammation and damage. However, other studies have shown that the keto diet can help reduce liver fat content and improve liver health in individuals with NAFLD, possibly due to the restoration of insulin sensitivity and decreased insulin resistance.
While the keto diet may offer potential benefits for individuals with fatty liver disease, it is important to note that it can also increase cholesterol and liver enzymes. Therefore, it should be approached with caution and preferably undertaken with regular medical monitoring, especially for those with existing liver problems or other health conditions.
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Keto can reverse fatty liver damage
Non-alcoholic fatty liver disease (NAFLD) is a condition in which excess fat builds up in the liver. NAFLD is associated with diabetes, obesity, and elevated triglycerides. It is estimated to affect about 25% of the population in most Western countries, and as many as 1 billion people worldwide. The standard treatment for NAFLD is weight loss, which can reduce fat in the liver, lower inflammation, and reduce scarring.
The ketogenic diet is a high-fat, low-carb, moderate-protein diet that produces metabolic changes similar to those seen in a state of starvation. While the keto diet has been linked to elevated cholesterol and liver enzymes, which can lead to potential non-alcoholic fatty liver disease, it has also been shown to be effective in losing weight, reducing blood sugar, lowering blood pressure, and improving cholesterol numbers.
Several studies have demonstrated the potential benefits of a ketogenic diet in preventing and reversing NAFLD. A 2018 study found that obese or overweight patients who followed a low-carbohydrate diet for a year experienced improved blood sugar parameters, reduced cardiovascular risk factors, and improved liver enzymes. Another study showed that a short-term ketogenic diet decreased intrahepatic triglycerides (IHTG) and hepatic insulin resistance, despite an increase in plasma non-esterified fatty acid (NEFA) concentrations. This suggests that the ketogenic diet can promote ketogenesis rather than the synthesis of IHTG, leading to a rapid reversal of NAFLD.
In addition to its direct effects on liver health, the keto diet can also address underlying factors that contribute to NAFLD. By improving insulin sensitivity and managing blood glucose, the keto diet can help reduce the risk and worsening of fatty liver disease. Furthermore, weight loss induced by the keto diet can reduce fat accumulation in the liver, thereby reversing NAFLD.
Overall, while there are concerns about the potential negative impacts of the keto diet on liver health, the available research suggests that it can be an effective approach to preventing and reversing NAFLD. However, it is important to note that individual results may vary, and consulting with a healthcare professional before starting any dietary intervention is always recommended.
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Keto can cause fat build-up in the liver
The keto diet is a high-fat, low-carb, moderate-protein diet that produces metabolic changes similar to those seen in a state of starvation. It was originally developed to treat refractory epilepsy in infants and children under medical supervision. In recent years, it has become a mainstream weight-loss strategy.
When following the keto diet, individuals derive around 80% of their caloric intake from fat. This can lead to a build-up of fat in the liver, known as fatty liver disease. Fatty liver disease has two types: alcoholic fatty liver disease, caused by excessive alcohol use, and non-alcoholic fatty liver disease (NAFLD), caused by various factors unrelated to alcohol. While weight loss is the primary treatment for NAFLD, restoring insulin sensitivity by following a low-carbohydrate diet like keto may also help.
Some studies have found a link between the keto diet and NAFLD. Animal studies, for example, suggest that keto can cause NAFLD and raise liver enzyme levels. However, other studies indicate that keto can improve NAFLD and lower liver fat content. For instance, a 2018 study of 262 obese or overweight patients found that after one year, participants had improved blood sugar parameters, reduced cardiovascular risk factors, and improved liver enzymes. They also experienced sustained weight loss.
While the keto diet can be an effective tool for weight loss and managing fatty liver disease, it is not suitable for everyone. Experts recommend following keto for no more than 6 to 12 months and only under regular medical monitoring. It may be particularly risky for individuals with existing liver problems, as it can worsen their condition.
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Keto can worsen existing liver problems
The ketogenic diet has become a popular weight-loss approach, with some studies showing that it can be effective in managing fatty liver disease. However, it is crucial to note that the keto diet can worsen existing liver problems.
The liver plays a vital role in breaking down fat and converting it into energy and cholesterol. When following a high-fat diet like keto, the liver can struggle to process the increased fat intake, leading to a potential buildup of fat in the liver. This buildup of fat is known as fatty liver disease, which can have serious consequences such as cirrhosis and liver cancer.
In a case study, a 57-year-old woman with obesity introduced a ketogenic diet and presented with worsened hyperlipidemia and elevated liver enzymes. An abdominal ultrasound suggested non-alcoholic fatty liver disease (NAFLD). Discontinuing the ketogenic diet resulted in a reduction of low-density lipoprotein cholesterol (LDL-C) and liver enzymes.
Animal studies have also indicated that the keto diet may contribute to the development of NAFLD and raised liver enzyme levels. However, it is important to note that the current research is limited to early animal and human studies, and more comprehensive investigations are required to understand the long-term effects of the keto diet on liver health.
If you have existing liver problems or concerns about your liver health, it is essential to consult with your doctor or a healthcare professional before starting the keto diet. They can provide personalized advice and monitoring to ensure your safety and well-being.
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Frequently asked questions
Eating keto can cause nonalcoholic fatty liver disease (NAFLD) in some cases. NAFLD is a common chronic liver disease where extra fat builds up in the liver and can lead to serious consequences like cirrhosis and liver cancer.
NAFLD is often described as a "silent killer", meaning patients rarely show early symptoms. Late symptoms of NAFLD include fatigue and pain in the upper right side of the abdomen.
NAFLD is caused by many factors unrelated to alcohol. Weight loss is the main treatment for NAFLD, but it can also be caused by poor eating habits and fad diets that boost fat intake.
If you are concerned about developing NAFLD, it is important to maintain a healthy weight and eat a well-balanced diet that includes high-fiber foods, vegetables, fruits, fish, lean meats, nuts, eggs, seeds, and unrefined oils.
