The keto diet is a low-carb, high-fat, and high-protein eating plan that has gained popularity in recent years. While it is advertised as a weight-loss solution, it is actually a medical diet that comes with serious risks and is not recommended for long-term use. The keto diet is extremely strict and difficult to maintain, requiring 75% of calories from fat and only 5% from carbohydrates. This can lead to nutrient deficiencies, fuzzy thinking, mood swings, constipation, kidney problems, and an increased risk of heart disease. The high-fat content can also lead to weight gain and increased cholesterol levels, which are risk factors for heart disease. Additionally, the keto diet restricts fresh fruits and vegetables, whole grains, and low-fat dairy, which are important for long-term health and weight loss.
Characteristics | Values |
---|---|
Sustainability | Not realistic or sustainable |
Health | Increase in "bad" LDL cholesterol, which is linked to heart disease |
Linked to liver and kidney problems | |
Fuzzy thinking and mood swings | |
Constipation | |
Nutrient deficiency | |
Social isolation or disordered eating | |
Low blood pressure | |
Kidney stones |
What You'll Learn
May cause nutrient deficiencies
The keto diet is a low-carb, high-fat diet that restricts carbohydrates and replaces them with large amounts of healthy fats that the body burns for energy. While the keto diet may help with weight loss, it is important to consider how it affects the body. The food we eat influences how nutrients work in our body, and genetics, age, health conditions, medications, and metabolism all contribute to how well nutrients are absorbed in the body.
Because the keto diet limits or eliminates certain foods, it may not provide all the essential vitamins and minerals needed to maintain a healthy diet. Whole grains, fruits, and vegetables are typically curtailed or eliminated on the keto diet, which may result in a lack of vitamins, minerals, fiber, and phytochemicals found in these food groups.
Common Nutrient Deficiencies on the Keto Diet
- Vitamin B1
- Vitamin B6
- Vitamin B7
- Vitamin B12
- Calcium
- Iron
- Magnesium
- Phosphorus
- Selenium
- Folate
- Choline
Preventing Nutrient Deficiencies on the Keto Diet
To prevent nutrient deficiencies on the keto diet, it is important to be aware of any existing deficiencies and ensure that the diet includes a variety of nutrient-dense foods. High-quality meats, such as grass-fed beef, pastured pork, poultry, and eggs, can provide necessary B vitamins, iron, and phosphorus. Dark, leafy greens, broccoli, and avocados are good sources of vitamin B2, B6, B7, calcium, and magnesium. Full-fat yogurt, salmon, canned sardines, and plant-based milks are good sources of vitamin B1, calcium, and phosphorus.
Additionally, supplementation may be necessary to prevent or correct nutrient deficiencies. A ketogenic diet may be lower in fiber due to the elimination of whole grains, so a fiber supplement may be beneficial.
It is important to speak with a healthcare professional before starting the keto diet or making any significant dietary changes to ensure that nutrient needs are being met and to monitor for any potential health risks associated with the diet.
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May cause constipation and other digestive issues
Constipation is a common issue for people on the keto diet. This is due to the drastic reduction of carbohydrates, which typically provide a significant amount of fibre in a standard diet. Fibre is essential for maintaining regular bowel movements, and the keto diet's restriction of high-carb, fibre-rich foods like fruits, whole grains, and starchy vegetables can lead to a lack of fibre intake. As a result, up to 50% of people following a keto diet will experience constipation at some point.
To prevent and manage constipation while on the keto diet, it is important to focus on including fibre-rich, keto-friendly foods. Non-starchy vegetables such as broccoli, artichokes, and collard greens are good sources of fibre. Avocados, nuts, and seeds are also high in fibre and fit within the keto diet. Additionally, staying hydrated is crucial for digestive health, so be sure to drink plenty of water.
Another factor that may contribute to constipation on the keto diet is increased dairy consumption. Dairy products like cheese, yogurt, and cream are allowed on the keto diet due to their high fat and protein content. However, dairy can be difficult to digest for some people, leading to constipation as well as bloating, gas, and nausea. If you suspect dairy is causing your constipation, try reducing your intake or opting for dairy-free alternatives.
While constipation is a common issue on the keto diet, there are ways to manage and prevent it. By including fibre-rich, keto-friendly foods, staying hydrated, and being mindful of your dairy intake, you can help keep your digestive system regular. Remember to seek professional medical advice if constipation persists or is accompanied by other concerning symptoms.
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May cause dangerously low blood sugar
Why Keto May Cause Dangerously Low Blood Sugar
The keto diet is a popular eating plan that involves drastically reducing carbohydrate intake and increasing fat consumption. While this approach can lead to weight loss and improved blood sugar control for some individuals, it is not without risks. One potential danger of the keto diet is that it may cause hypoglycaemia, or dangerously low blood sugar levels.
When an individual follows the keto diet, their body enters a state called ketosis, where it burns fat for energy instead of carbohydrates. This shift in fuel source can lead to a decrease in blood sugar levels, which is particularly dangerous for people with diabetes. For those taking diabetes medications or insulin, the combination of keto and their treatment can lead to a dangerous drop in blood sugar.
Even for individuals without diabetes, the keto diet can cause hypoglycaemia. This is because the body's glucose stores in the liver may become depleted after extended periods of ketosis. Normally, when blood sugar levels drop too low, the liver releases stored glucose to bring them back up. However, if these stores are depleted due to a lack of carbohydrate intake, the liver may not be able to release enough glucose, resulting in hypoglycaemia.
The symptoms of hypoglycaemia include dizziness, fatigue, difficulty concentrating, and an irregular or increased heart rate. If left untreated, hypoglycaemia can lead to more serious complications, such as seizures or loss of consciousness. In the most severe cases, hypoglycaemia can even be fatal. Therefore, it is crucial to monitor blood sugar levels closely when following the keto diet and seek medical attention if symptoms of hypoglycaemia occur.
To treat hypoglycaemia caused by the keto diet, it is usually sufficient to consume a small amount of carbohydrates, such as fruit or a sugary snack. This will help to raise blood sugar levels back to a safe range. However, if symptoms do not improve or if they worsen, it is important to seek immediate medical attention.
In conclusion, while the keto diet may offer some benefits, it is not without risks. One of the most serious potential dangers is hypoglycaemia, or dangerously low blood sugar. This condition can occur in both individuals with and without diabetes, and it can have severe consequences if left untreated. Therefore, it is crucial to closely monitor blood sugar levels and seek medical advice before starting the keto diet.
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May cause kidney stones and other kidney problems
The ketogenic diet has been linked to an increased risk of kidney stones and other kidney problems. The diet's high fat content can lead to hypercalciuria, a condition where there are high levels of calcium in the urine, which can result in the formation of kidney stones. The risk of kidney stones is also increased by chronic metabolic acidosis, which can occur due to the diet's tendency to cause acidosis. Acidosis reduces calcium reabsorption in the kidneys and increases bone demineralization, leading to higher levels of urinary calcium.
Additionally, the ketogenic diet can cause dehydration, which is another significant factor in the formation of kidney stones. The diet has also been associated with an increased risk of other kidney problems, such as acute kidney injury, hyponatremia, hypomagnesemia, and hypercalciuria. The high-fat content can also interfere with the normal thirst mechanism, further contributing to dehydration and the risk of kidney stone formation.
The incidence of kidney stones among individuals on the ketogenic diet ranges from 3% to 10%, compared to approximately one in several thousand in the general population. The pooled estimated incidence of kidney stones was 5.9% in patients on ketogenic diets, with 5.8% in children and 7.9% in adults. Uric acid stones are the most common type of kidney stones in individuals on the ketogenic diet, followed by calcium-based stones.
To prevent kidney stone formation, it is recommended to liberalize fluid intake and use oral potassium citrate to alkalinize the urine. Regular monitoring of urine calcium-to-creatinine ratio and ultrasonography are also advised to detect the early development of kidney stones.
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May increase the risk of chronic diseases and early death
The ketogenic diet has been linked to an increased risk of chronic diseases and early death. Here are some of the ways in which the ketogenic diet may increase the risk of chronic diseases and early death:
- Nutrient Deficiency: The ketogenic diet is associated with a higher risk of nutrient deficiency. It typically involves curtailing or eliminating fruits, vegetables, whole grains, and legumes, which are essential sources of vitamins, minerals, fiber, and phytochemicals. This can lead to deficiencies in micronutrients such as selenium, magnesium, phosphorus, and vitamins B and C.
- Liver Problems: The high-fat content of the ketogenic diet can increase the risk of liver problems, especially in individuals with existing liver conditions. The diet's emphasis on fat metabolism may overload the liver and worsen any pre-existing liver conditions.
- Kidney Problems: The ketogenic diet may also increase the risk of kidney problems. The high protein content in some ketogenic diets can lead to hyperfiltration, which is associated with long-term damage to the kidneys. Additionally, the diet's acid load can worsen metabolic acidosis and kidney disease.
- Constipation: The ketogenic diet is low in fibrous foods like grains and legumes, which can lead to constipation.
- Fuzzy Thinking and Mood Swings: The ketogenic diet's low-carb nature may cause confusion and irritability due to the brain's preference for sugar from healthy carbohydrates as an energy source.
- Increased Risk of Chronic Diseases: The ketogenic diet has been linked to an increased risk of various chronic diseases. These include obesity, type2 diabetes, non-alcoholic fatty liver disease, cardiovascular disease, cancer, and Alzheimer's disease.
- Increased Risk of Early Death: Some studies have suggested a link between low-carbohydrate diets and early death. However, the evidence is mixed, and more research is needed to establish a definitive link.
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Frequently asked questions
The keto diet is not safe for those with any conditions involving their pancreas, liver, thyroid or gallbladder. It could also cause low blood pressure, kidney stones, constipation, nutrient deficiencies and an increased risk of heart disease.
The keto diet is associated with an increase in "bad" LDL cholesterol, which is linked to heart disease. It may also cause fuzzy thinking and mood swings, as the brain works best when its energy source is sugar from healthy carbohydrates.
The keto diet could cause low blood pressure, kidney stones, constipation, nutrient deficiencies and an increased risk of heart disease. It could also cause social isolation or disordered eating.
The keto diet restricts fresh fruits and vegetables, whole grains and low-fat dairy that can help with long-term weight loss and overall health. It is also not a realistic or sustainable diet.