Madeleine Hull
The LCHF (low-carb, high-fat) diet is an effective way to lose body fat and improve health. It involves reducing carbohydrates and increasing fats, with a daily carb intake ranging from under 20 grams to 100 grams. While it is generally challenging to gain weight on an LCHF diet, it is possible to eat too many calories and slow down weight loss. The key is to eat only when hungry and focus on diet quality, especially for those who are morbidly obese. LCHF diets have been shown to offer long-term weight loss and control of symptoms in several clinical conditions, but it is important to be mindful of potential drawbacks and consult a doctor before starting any new diet.
LCHF Diet
| Characteristics | Values |
|---|---|
| Carbohydrates | Low |
| Fats | High |
| Proteins | Moderate |
| Calories | Not restricted |
| Weight Loss | Effective |
| Health Benefits | Controls diabetes, heart disease, Alzheimer's disease |
| Food Options | Whole, unprocessed foods like fish, eggs, low-carb vegetables, nuts, meat, dairy |
| Food Restrictions | Processed foods, added sugar, starchy foods like bread, pasta, potatoes, rice, legumes |
| Daily Carb Recommendations | Under 20 grams to 100 grams, or even more |
| Drawbacks | Not suitable for children, teens, pregnant or breastfeeding women, may impair athletic performance |
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What You'll Learn
LCHF diet foods
The LCHF diet is a low-carb, high-fat diet. It is an umbrella term for eating plans that reduce carbs and increase fats. The diet is also moderate in protein. LCHF diets are promoted as a healthy and safe way to lose weight.
The LCHF diet is sometimes referred to as the "Banting Diet" after William Banting, a British man who popularised it after losing a large amount of weight. The diet emphasises whole, unprocessed foods and discourages highly processed, packaged items.
Foods to eat on the LCHF diet include:
- Fish, especially salmon, sardines and trout, which are high in fats
- Eggs, which are high in healthy fats and essentially carb-free
- Oils such as olive oil, coconut oil and avocado oil
- Meats and poultry, including red meat, chicken, venison and turkey
- Full-fat dairy such as cream, full-fat plain yoghurt, butter, and cheeses
- Non-starchy vegetables such as greens, broccoli, cauliflower, peppers, mushrooms and cruciferous vegetables like cabbage, cucumber, kale, spinach and melons
- Nuts and seeds, such as almonds, cashews, walnuts, macadamia, pecans, flaxseeds, chia, pumpkin and sunflower seeds
- Fruits like avocado
- Animal fats such as lard, poultry fat and bacon
Foods to avoid on the LCHF diet include:
- Grains and starches such as bread, rice, pasta and cereal
- Sugary drinks such as soda, juice, sweet tea, smoothies and sports drinks
- Sweeteners such as sugar, honey, agave and maple syrup
- Starchy vegetables such as potatoes, sweet potatoes and beets
- Fruits—these should be limited, but small portions of berries are encouraged
- Alcoholic beverages such as beer, sugary cocktails and wine
- Low-fat and diet items—these are often high in sugar
- Highly processed foods—the diet encourages limiting packaged foods and increasing whole, unprocessed foods
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Weight loss on LCHF
The LCHF (low-carb, high-fat) diet is an effective way to lose weight and improve health. It involves reducing carbohydrate intake, increasing fat consumption, and moderating protein intake. The diet emphasizes whole, unprocessed foods like fish, eggs, low-carb vegetables, and nuts while discouraging highly processed and packaged items.
The LCHF diet is not just about the number of calories consumed but also about the quality of those calories. It is generally hard to gain weight on an LCHF diet because it suppresses appetite and reduces overall hunger. Even if one overeats on LCHF foods, weight gain is likely to be modest, as seen in an experiment by Sam Feltham, who only gained 3.5 lbs (1.7 kg) despite consuming an average of 5794 calories daily.
To kick-start weight loss, some LCHF diets recommend a two-week induction phase where carb intake is restricted to 20 grams per day, after which dieters can slowly introduce more carbohydrates. The Atkins diet is a popular LCHF diet that promotes weight loss and has a similar initial phase. The ketogenic (keto) diet is another variation of LCHF that typically involves consuming no more than 5-10% carbohydrates, or about 20-50 grams of carbs per day, to achieve ketosis, a state where the body burns fat for energy instead of carbohydrates.
While the LCHF diet has been shown to promote short-term fat loss, there is limited research on its long-term effects. It may not be suitable for everyone, especially children and teens and women who are pregnant or breastfeeding. People with certain medical conditions, such as diabetes or kidney disease, should consult a doctor before starting an LCHF diet. Additionally, it is important to note that drastically reducing carbohydrates can lead to temporary side effects, and there may be potential risks associated with the diet, such as an increased chance of developing heart disease from consuming high amounts of animal protein and fat.
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Health benefits of LCHF
The LCHF (Low-Carb High-Fat) diet is a popular approach to weight loss and improved health outcomes, especially for those with metabolic syndrome and NAFLD. It is also known as a keto or ketogenic diet.
LCHF diets are based on the principle of cutting down on carbohydrates and increasing the consumption of dietary fats. This shift in energy sources from carbohydrates to fats affects metabolic processes, energy levels, and even hunger, offering a new approach to maintaining a steady weight and enhancing health. The diet is also promoted as a healthy and safe way to lose weight.
Weight Loss
The LCHF diet has been shown to be an effective strategy for weight reduction through increased satiety and a reduction in calorie intake. The diet also helps to control energy balance, keeping energy levels consistent and preventing the energy spikes and crashes associated with high-carb diets.
Metabolic Health
The LCHF diet can improve metabolic health by reducing oxidative stress and inflammation, which are factors in neurodegeneration. The diet also supports insulin sensitivity, lowers blood sugar, and reduces triglycerides, contributing to better heart health and a reduced risk of diabetes.
Brain Health
The reduction of refined carbs and increased consumption of healthy fats in the LCHF diet can reduce oxidative stress and provide anti-inflammatory benefits, which can be seen as a form of "anti-aging" for the brain.
Management of Chronic Conditions
The LCHF diet has been used to manage chronic conditions like diabetes, heart disease, and neurological conditions like Alzheimer's disease. The diet can improve blood sugar control and reduce the need for diabetes medication. It has also been used to reduce the frequency of seizures in individuals with epilepsy.
Flexibility and Simplicity
The LCHF diet is less restrictive than other diets like keto, allowing for adjustments to fat and carb intake according to personal goals and preferences. It emphasizes high-quality, whole foods without complex rules or extreme restrictions, making it a more flexible and sustainable approach to health and wellness.
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Drawbacks of LCHF
While the LCHF diet has been linked to a growing number of health benefits, there are some drawbacks to consider. Firstly, more extreme versions of the LCHF diet, such as the ketogenic diet, are not suitable for children, teens, or women who are pregnant or breastfeeding, unless it is being used therapeutically to treat a medical condition. People with diabetes or health conditions affecting the kidneys, liver, or pancreas should consult a doctor before starting an LCHF diet. Additionally, the LCHF diet may not be suitable for elite athletes as it may impair athletic performance at competitive levels.
Another drawback of the LCHF diet is that it may cause unpleasant side effects in some individuals, especially in the case of very low-carb versions such as the ketogenic diet. The LCHF diet does not have clear standards for macronutrient percentages, and daily carb recommendations can range from under 20 grams to up to 100 grams. This lack of standardization may make it challenging for individuals to determine the appropriate amount of carbs, fats, and proteins to consume.
Furthermore, there is conflicting evidence regarding the safety and effectiveness of the LCHF diet. While some research suggests that it can be beneficial for weight loss and managing certain health conditions, other studies indicate that low-carb diets may lead to an increased risk of heart disease, cancer, and stroke. Scientists need to conduct more research to fully understand the long-term effects of the LCHF diet on overall health.
It is worth noting that before starting any diet, it is advisable to consult a healthcare professional to ensure that it is safe and appropriate for your individual needs. Additionally, making simple lifestyle changes, such as incorporating exercise and adopting a balanced diet, may be sufficient to improve overall health and well-being without the need for more restrictive dietary approaches.
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LCHF and exercise
The LCHF (low-carb, high-fat) diet is a lifestyle approach that focuses on reducing carbohydrate intake, increasing fat consumption, and keeping protein intake moderate. It is not a weight-loss trend but rather evolved from therapeutic uses, such as managing conditions like epilepsy and type 2 diabetes. The diet encourages a shift in how the body obtains energy, favouring fats over carbohydrates. This shift aims to stabilize energy levels, curb cravings, and support metabolic health.
When it comes to exercise, the LCHF diet has been explored for its potential benefits on athletic performance. There is emerging scientific evidence that LCHF diets can at least maintain, if not enhance, endurance performance while improving body composition compared to high-carbohydrate, low-fat (HCLF) diets. LCHF-adapted endurance athletes can achieve a higher fat oxidation rate, which may improve performance in ultra-endurance events and prevent performance decline in later stages of repeated high-intensity movements.
However, it is important to note that metabolic changes and restoration of muscle glycogen after an LCHF diet may take several months. Additionally, further investigations are needed to fully understand the impact of LCHF diets on repeated high-intensity exercise performance, central fatigue during endurance events, and ideal dietary fatty acid compositions.
When combining the LCHF diet with exercise, it is crucial to ensure adequate nutrient intake, especially if weight loss is a goal. Creating a calorie deficit by consuming fewer calories or increasing physical activity can be effective for weight loss, but nutritional deficiencies and metabolic changes can make long-term weight maintenance challenging.
If you are struggling with energy during high-intensity activities while on the LCHF diet, you may need to adjust your carbohydrate intake around workouts or add more fat for steady energy. It is also important to remember that diet quality and eating only when hungry are crucial factors in weight loss, especially if you are morbidly obese.
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Frequently asked questions
LCHF stands for Low-Carbohydrate High-Fat. It is a diet that reduces carbs and increases fats. It is also sometimes referred to as the Banting Diet, after William Banting, who popularised it in the 1800s.
There is no set limit on calories for an LCHF diet. However, it is important to only eat when you are hungry, as eating more than you need will slow down or stop weight loss.
The LCHF diet emphasises whole, unprocessed foods. You can eat meat, fish, eggs, low-carb vegetables, nuts, butter, cheese, milk and yogurt.
