Brenda Khan
The keto diet is a popular weight-loss plan that involves eating a low-carbohydrate, high-fat diet. While it has been used to treat epilepsy in children, it has gained attention as a weight-loss tool. The keto diet restricts carbohydrate-rich foods such as grains, beans, fruits and starchy vegetables, and increases fat intake to force the body to burn fat for energy instead of carbohydrates. However, the keto diet is not without its risks. It is associated with an increased risk of kidney stones, gastrointestinal issues, and an increased risk of heart disease due to high saturated fat consumption. There is also limited research on the long-term effects of the keto diet, and it is not recommended as a long-term dietary choice.
| Characteristics | Values |
|---|---|
| Safe duration | Early research suggests that the diet is safe for up to 24 weeks, with another study recommending a maximum duration of 12 months. |
| Calorie composition | 75% to 90% of calories from fat, 10% to 20% from protein, and 5% from carbohydrates |
| Food sources | Real animal protein and animal fat, such as eggs, meat, and dairy |
| Health benefits | Weight loss, improved blood sugar levels, lower blood sugar, reduced inflammation, improved metabolism, lower risk of cancer, reduced arthritis pain, enhanced brain function |
| Concerns | May not be sustainable long-term, potential kidney health risks, concerns about the quality of fats consumed |
| Recommendations | Consult a doctor or certified nutritionist, especially one with expertise in fats, to ensure a safe and effective keto diet |
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The keto diet
While the keto diet can lead to initial weight loss, some of this is likely due to the loss of excess water rather than fat. Additionally, the high-fat content, particularly saturated fat, can increase the risk of heart disease. The keto diet also restricts many nutritious foods, including fruits, vegetables, whole grains, beans, and legumes, which can lead to nutritional deficiencies and constipation.
Short-term health issues associated with the keto diet include "keto flu," bad breath, constipation, and low blood sugar, which can cause dizziness, shakiness, and heart palpitations. The long-term health effects of the keto diet are less understood, and there is a potential for harm. It may impact the kidneys, with an increased risk of kidney stones, and can affect the liver, thyroid, or gallbladder.
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Intermittent fasting
There are several ways to practice intermittent fasting, including the popular 5:2 method, where five days are normal eating and two are extremely low-calorie fast days, and the 16/8 method, which involves eating during an eight-hour window and fasting for the remaining 16 hours of the day.
Combining the keto diet with intermittent fasting may help individuals reach the state of ketosis faster and potentially burn more fat. This is because during fasting, the body's fuel source shifts from carbohydrates to fats, which is the basis of the keto diet.
While some studies suggest that intermittent fasting can be a safe and effective way to reduce excess body fat, there is a lack of rigorous research on its long-term effects, particularly when combined with the keto diet. Additionally, it is important to note that both the keto diet and intermittent fasting are very restrictive and may not be suitable for everyone.
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Weight loss
The ketogenic diet, commonly known as the keto diet, is a low-carbohydrate, high-fat diet that has been advertised as a weight-loss wonder. The keto diet aims to force the body to use an alternative type of fuel called ketones, which are produced from stored fat. This metabolic state is called ketosis.
The keto diet has been shown to be effective for weight loss, especially for individuals with obesity, and can also provide numerous health benefits such as lowering the risk of certain diseases. However, it is not a sustainable long-term solution as it is extremely strict and difficult to maintain. It also comes with health risks and can be unsafe for certain patients. Some people may experience side effects while their body adapts, commonly referred to as the "keto flu", which include symptoms such as diarrhoea, constipation, and vomiting. The keto diet can also cause a drop in blood sugar, which can be dangerous for people with diabetes. Additionally, rapid weight loss on a keto diet can lead to muscle loss and negatively impact athletic performance.
For long-term weight loss, a balanced approach like the Mediterranean diet is recommended, which focuses on plant-based eating. Intermittent fasting is another approach that allows individuals to receive the benefits of ketosis while still eating a varied and balanced diet. It involves cycling between periods of eating and fasting, which can lead to "mild ketosis" during the fasting phase. Unlike the keto diet, intermittent fasting does not require strict food restrictions and allows for a variety of nutrient-dense foods.
It is important to consult a healthcare professional before starting any new diet, especially for those with specific medical conditions, to ensure safety and effectiveness.
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Healthy eating
A healthy diet starts early in life, with breastfeeding fostering healthy growth and having long-term health benefits, like reducing the risk of becoming overweight or obese. It is important to continue eating a variety of foods throughout life to ensure a balanced diet and that the body is receiving all the nutrients it needs.
The key to a healthy diet is to eat the right amount of calories for how active you are, balancing the energy you consume with the energy you use. Men should have around 2,500 calories a day, while women should aim for 2,000 calories. Most adults are eating more calories than they need and should reduce their intake. Starchy carbohydrates, such as potatoes, bread, rice, pasta, and cereals, should make up just over a third of the food you eat. Choose higher-fibre or wholegrain varieties, such as wholewheat pasta, brown rice, or potatoes with their skins, as they contain more fibre and can help you feel full for longer. Try to include at least one starchy food with each main meal.
It is also important to eat at least five portions of fruit and vegetables every day. These provide key nutrients and dietary fibre, which help maintain digestive health and control blood sugar and cholesterol levels. They are also loaded with vitamins and minerals, and their colours, flavours, and textures make meals more enjoyable. When choosing between fresh, frozen, or canned produce, be aware that canned food can often be high in salt.
In addition to fruits and vegetables, include dairy or dairy alternatives, beans, pulses, fish, eggs, meat, and other sources of protein in your diet. Fish is a good source of protein and omega-3 fatty acids, with oily fish being particularly beneficial. Aim to eat at least two portions of fish a week, including one portion of oily fish. Meat should be lean, and skinless poultry is preferable to reduce fat intake. Eggs are another good source of protein and contain many vitamins and minerals. Dairy foods, such as milk, cheese, and yoghurt, are also good sources of protein and calcium, which is essential for healthy bones. Go for lower-fat and lower-sugar products where possible.
Finally, pay attention to your fat and sugar intake. Some fat is essential, but most people eat too much saturated fat, which can increase the risk of heart disease. Choose unsaturated fats, such as vegetable oils and spreads, instead. All types of fat are high in energy, so they should be eaten in small amounts. Similarly, regularly consuming sugary foods and drinks increases the risk of obesity and tooth decay and can contribute to weight gain. Sugars should represent less than 10% of your total energy intake, with further reductions having additional health benefits.
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Balanced diet
A balanced diet is an important part of maintaining good health and can make you feel your best. It gives your body the nutrients it needs to function correctly and protects you against many chronic noncommunicable diseases, such as heart disease, diabetes, and cancer. Without balanced nutrition, your body is more prone to disease, infection, fatigue, and low performance.
A balanced diet will usually include a combination of different foods from the following groups: fruits, vegetables, dairy, grains, and protein. It is recommended to eat at least 5 portions of a variety of fruits and vegetables every day. It is also recommended to base meals on higher-fibre, starchy foods like potatoes, bread, rice, or pasta. Dairy or dairy alternatives are also important, as they are good sources of protein and calcium, which helps keep your bones healthy.
It is also important to include some form of protein in your diet, such as meat, eggs, fish, beans, nuts, and legumes. Fish is a particularly good source of protein, as it contains many vitamins and minerals, and is rich in omega-3 fatty acids. It is recommended to eat at least 2 portions of fish a week, including 1 portion of oily fish. Eggs are also a good source of protein and contain many vitamins and minerals.
In addition to the food groups mentioned, it is important to include some healthy fats in your diet. While some saturated fat is necessary, it is important to limit the amount and get most of your fat intake from unsaturated oils and spreads, as they can help lower cholesterol. Nuts are a good source of unsaturated fat, but they should be eaten in moderation due to their high-fat content.
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Frequently asked questions
Keeping a diet is safe as long as it is well-balanced. This means eating a variety of foods from each of the five major food groups in the recommended amounts. It is also important to eat in the right proportions and consume the right amount of food and drink to achieve and maintain a healthy body weight.
The five major food groups are:
- Staples like cereals (wheat, barley, rye, maize or rice) or starchy tubers or roots (potato, yam, taro or cassava).
- Fruits and vegetables.
- Foods from animal sources (meat, fish, eggs and milk).
- Legumes (lentils and beans).
- Fats and oils.
Here are some tips for keeping a safe diet:
- Plan your meals ahead of time and cook in bulk.
- Eat at least five portions of a variety of fruits and vegetables every day.
- Base meals on higher-fibre, starchy foods.
- Eat some beans, pulses, fish, eggs, meat and other protein.
- Choose unsaturated oils and spreads, and eat them in small amounts.
- Eat wholemeal or wholegrain breakfast cereal that is low in sugar, served with low-fat milk.
- Eat less saturated fat and choose foods that contain unsaturated fats, such as vegetable oils and spreads, oily fish and avocados.
- Eat less salt and sugar.
One popular diet is the ketogenic or keto diet, which involves shifting the main source of calories to fatty foods, with only 10% to 20% of your calories coming from protein and 5% from carbohydrates. While keto is an effective way to jump-start weight loss and improve blood sugar levels, it is hard to maintain, and long-term studies on its sustainability are lacking. Another popular practice is intermittent fasting, which is safe when not taken to extremes. Fasting has been linked to lower blood sugar, reduced inflammation, improved metabolism, lower risk of cancer, reduced pain from arthritis, and enhanced brain function.
