Milly Gaines
The ketogenic or keto diet is a low-carbohydrate, fat-rich eating plan that has been used for centuries to treat specific medical conditions. In the 19th century, the ketogenic diet was used to help control diabetes. More recently, it has been used to reduce seizures in children with epilepsy. While the diet allows for high-fat intake, experts recommend prioritizing healthy fats like monounsaturated and polyunsaturated fats found in olive oil, avocado, and fatty fish to promote heart health. However, the keto diet is associated with an increase in bad LDL cholesterol, which is linked to an increased risk of heart disease. This has led some experts to question whether the excessive fats in the keto diet are truly okay to eat.
| Characteristics | Values |
|---|---|
| Percentage of calories from fat | 75-90% |
| Sources of fat | Olive oil, coconut oil, avocado, nuts, seeds, fatty fish, red meat, cheese, butter, tofu, eggs, bacon |
| Health effects | Weight loss, improved glucose control, reduced insulin resistance, lower blood pressure, lower cholesterol, reduced seizures in children with epilepsy |
| Negative health effects | Increased "bad" LDL cholesterol, risk of heart disease, nutrient deficiency, liver problems, kidney problems, dehydration, constipation, "keto flu" |
| Recommended by | Endurance athletes, bodybuilders |
| Not recommended for | People with kidney disease, cardiovascular disease, autoimmune diseases, osteoporosis, certain deficiencies, high cholesterol, diabetes or pre-diabetes |
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What You'll Learn
- The keto diet is associated with an increase in bad LDL cholesterol, which is linked to heart disease
- The keto diet may not be appropriate for everyone, especially people with kidney disease
- The keto diet is advertised as a weight-loss wonder but is actually a medical diet that comes with serious risks
- The keto diet can lead to dehydration because of the elimination of glycogen, which holds water, from the bloodstream
- The keto diet may cause constipation due to a lack of fibre
The keto diet is associated with an increase in bad LDL cholesterol, which is linked to heart disease
The keto diet is a high-fat, low-carbohydrate diet that has gained popularity for weight loss. It involves deriving up to 80-90% of daily calories from fat. While the diet allows for high-fat intake, experts recommend prioritizing healthy fats like monounsaturated and polyunsaturated fats found in olive oil, avocado, and fatty fish to promote heart health.
However, the keto diet has been associated with an increase in "bad" LDL cholesterol. Numerous studies have shown that the keto diet leads to a modest increase in cholesterol levels, with some patients labeled as "hyper-responders" experiencing a significant elevation in their cholesterol levels. The average increase in LDL cholesterol levels for patients on the keto diet for 12.3 months was 187 mg/dL, representing a 245% increase. When these patients stopped the keto diet, their LDL cholesterol levels decreased by an average of 174 mg/dL, a 220% decrease.
LDL cholesterol is linked to an increased risk of heart disease. The American Heart Association recommends limiting saturated fat intake to less than 6% of daily calories due to its association with heart disease. The keto diet encourages high consumption of saturated fats from oils (palm, coconut), lard, butter, and cocoa butter, which may lead to an increased risk of heart disease.
While the keto diet may produce modest reductions in triglycerides and increases in HDL ("good") cholesterol, the fluctuations in LDL cholesterol can vary depending on diet quality and genetic factors. Some studies have shown that a keto diet with a low-carbohydrate diet high in healthy unsaturated fat and limited in unhealthy saturated fat can lead to a decrease in LDL cholesterol. Therefore, it is essential to consult a doctor before adopting the keto diet and incorporating only heart-healthy fats into the diet.
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The keto diet may not be appropriate for everyone, especially people with kidney disease
The keto diet is a low-carbohydrate, high-fat diet that has gained popularity for weight loss. It involves getting up to 80% of total daily calories from fat. While the keto diet has been successful in helping many people lose weight, it may not be appropriate for everyone, especially those with kidney disease.
The keto diet has been associated with an increased risk of kidney stones and a decline in kidney function for those with kidney disease. This is because eating more protein and animal fats generates more acid in the blood, leading to metabolic acidosis, which affects bone and muscle health. Metabolic acidosis also increases the risk of developing kidney stones and hastens the decline of kidney function. Additionally, the high consumption of saturated fats on the keto diet may increase the risk of heart disease.
For those with kidney disease, it is recommended to adopt a healthy lifestyle with balanced and portioned meals that include adequate amounts of protein, carbohydrates, fat, fiber, and other micronutrients. Restricting salt intake and ensuring proper hydration can also help alleviate stress on the kidneys. There are alternative diets for weight loss, such as the Mediterranean or plant-based diets, that have less potential risk and more evidence of safety.
While the keto diet has been successful for some, it is not a one-size-fits-all solution and may have negative consequences for certain individuals, especially those with kidney disease. It is always important to consult with a healthcare professional before starting any new diet, especially if there are existing health concerns.
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The keto diet is advertised as a weight-loss wonder but is actually a medical diet that comes with serious risks
The keto diet has been advertised as a weight-loss wonder, but it is actually a medical diet that comes with serious risks. The ketogenic diet has been around since the 1920s and was initially used to reduce seizures in children with epilepsy. While it is still prescribed for that purpose, it has gained popularity as a weight-loss tool.
The keto diet is a low-carbohydrate, high-fat diet. It requires that you deprive yourself of carbohydrates, limiting them to fewer than 20 to 50 grams of carbs per day, and instead consume fat at each meal. This means that up to 80% or 90% of your daily calories come from fat. While this may seem enticing, it is important to note that not all sources of fat are equally healthy.
Some experts recommend prioritizing healthy fats like monounsaturated and polyunsaturated fats found in olive oil, avocado, and fatty fish to promote heart health. However, the keto diet encourages the consumption of saturated fats from oils (palm, coconut), lard, butter, and cocoa butter in high amounts. These types of saturated fats can increase your risk of heart disease by raising your LDL ("bad") cholesterol levels.
In addition to the risk of heart disease, the keto diet has been associated with other serious risks. These include nutrient deficiency, liver problems, kidney problems, dehydration, constipation, and social isolation or disordered eating. The keto diet restricts fresh fruits and vegetables, whole grains, and low-fat dairy, which can make it difficult to obtain essential micronutrients and promote long-term weight loss and overall health.
Furthermore, the keto diet is extremely strict and difficult to maintain. Many people experience weight regain once they stop the diet, and the weight gain may be more than what was initially lost. It is important to consult a medical professional before starting the keto diet, as it may not be appropriate for everyone, especially those with kidney disease.
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The keto diet can lead to dehydration because of the elimination of glycogen, which holds water, from the bloodstream
The ketogenic diet, commonly known as the keto diet, is a low-carbohydrate, high-fat diet. It involves deriving up to 80% of daily calories from fat, severely restricting carbohydrates, and forcing the body to burn fat for fuel instead of glucose. This shift in the body's primary energy source from glucose to fat results in a metabolic state called ketosis, where the body breaks down fats into molecules called ketones, which serve as an alternative fuel source.
While the keto diet has gained popularity due to its weight loss potential, it is important to understand its impact on the body, including dehydration. Dehydration is a common side effect of the keto diet, and it occurs due to the elimination of glycogen from the bloodstream. Glycogen is the body's stored form of carbohydrates, and it holds water. When the body restricts carbohydrates, glycogen stores deplete, leading to the excretion of bound water, resulting in dehydration. This dehydration, known as keto flush, can cause a rapid drop in weight, giving a deflated appearance due to the loss of water and glycogen in the muscles.
The keto diet's dehydrating effect extends beyond muscle mass. It also affects the fat-free mass component of the body, reducing its water percentage. Additionally, the loss of glycogen and water during ketosis can lead to a decrease in overall body water content. This dehydration can further result in a loss of electrolytes, potentially stressing the kidneys and exacerbating existing health conditions.
It is crucial to address dehydration when following the keto diet. Ensuring adequate fluid intake and monitoring electrolyte levels are essential to mitigate the dehydrating effects of the diet. While keto flush is considered temporary, preventable, and reversible, it underscores the importance of careful planning and consideration of individual needs when adopting the keto diet. Consulting with healthcare professionals and registered dietitians can help provide comprehensive support and guidance to those considering the keto diet, ensuring a safe and effective approach to weight loss and improved health.
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The keto diet may cause constipation due to a lack of fibre
The keto diet is a low-carbohydrate, high-fat diet that is advertised as a weight-loss plan. It involves getting up to 80% of your calories from fat and only 20 to 50 grams of carbohydrates per day. This drastic reduction in carbohydrates leads the body to switch its fuel source from glucose to fatty acids and ketone bodies, which are produced by the liver from stored fat.
However, one of the drawbacks of the keto diet is its potential to cause constipation due to a lack of fibre. Constipation is defined as having fewer than three bowel movements a week, with stools that are hard and dry or difficult to pass. The keto diet restricts many high-fibre foods such as fruits, whole grains, and starchy vegetables, making it challenging to obtain adequate fibre. Fibre is essential for maintaining regular and healthy bowel movements, and insufficient fibre intake can disrupt the gut microbiota, leading to constipation.
To prevent constipation while on the keto diet, it is crucial to include fibre-rich foods such as nuts, seeds, avocados, broccoli, berries, and non-starchy leafy greens. Additionally, it is recommended to introduce the keto diet gradually, starting with a higher daily carb intake and slowly reducing it as the digestive system adjusts. This approach may help reduce the likelihood of constipation and other side effects.
It is worth noting that the keto diet's high-fat content can also contribute to constipation. Some people may struggle with the transition to a very high-fat diet, which can cause gastrointestinal upset. Therefore, it is important to ensure that the fats and proteins consumed come from whole foods rather than processed meals, as the latter can put extra stress on the digestive system.
If you are experiencing constipation while on the keto diet, it is advised to increase your fibre intake, drink more water, and engage in physical activity. If these measures do not provide relief, consult a doctor for further guidance.
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Frequently asked questions
No, it is not safe to eat excessive fats on the keto diet. The keto diet is associated with an increase in "bad" LDL cholesterol, which is linked to heart disease. It is recommended that saturated fats be kept to no more than 7% of your daily calories.
Some sources of fat that are suitable for the keto diet include olive oil, coconut oil, avocado, nuts, seeds, and fatty fish.
The keto diet carries numerous risks due to its high-fat content. These risks include nutrient deficiency, liver problems, kidney problems, dehydration, and constipation.
The keto diet has been shown to produce beneficial metabolic changes, including weight loss, improved insulin resistance, reduced blood pressure, and lower cholesterol and triglyceride levels. It has also been used to treat medical conditions such as epilepsy, cancer, diabetes, and Alzheimer's disease.
