The ketogenic, or keto, diet is a low-carb, high-fat eating plan that has become extremely popular in recent years. The keto diet is based on the idea of achieving ketosis, a metabolic state in which the body uses fat instead of glucose as its primary energy source. While the keto diet has been linked to weight loss, there is limited research on its long-term effectiveness. Additionally, keto diet pills and supplements that claim to aid weight loss may not be safe or effective, and it is important to consult a doctor or dietitian before starting any new diet or taking supplements.
Characteristics | Values |
---|---|
Carbohydrate intake | 5-10% of total daily calorie intake |
Fat intake | 70-90% of calories |
Protein intake | 20% of calories |
Calories | A calorie deficit is required to lose weight |
Hunger | Reduced levels of ghrelin, a hunger hormone |
Water weight | Loss of water weight due to reduced carb intake |
Calories burned | A small increase in the number of calories burned |
Satiety | High fat and very low carb diets may change satiety signals |
Supplements | MCT oil, exogenous ketones, keto protein powders, keto electrolytes, and digestive enzymes |
Exercise | Combining keto with exercise can enhance weight loss |
Sleep | Lack of sleep can negatively impact weight loss |
What You'll Learn
Keto diet pills and supplements
The keto diet is a low-carb, high-fat approach to weight loss that is widely popular but challenging to follow and not very sustainable. The diet eliminates nearly all carbohydrates and relies on calories from fat for fuel, a process called ketosis.
Given the challenges of the keto diet, it's no surprise that manufacturers have created keto supplements claiming to help boost energy, burn fat and lose weight fast. But do they work?
Keto supplements claim to increase ketone levels, help you achieve ketosis faster and ultimately lose weight. They typically contain two active ingredients: ketone beta-hydroxybutyrate (BHB) and medium-chain triglycerides (MCTs). BHB is a compound that the liver produces from fats, which circulates in the bloodstream and is used up by the body's tissue for energy. MCTs are a type of fat found in coconut and palm oil that can be used as a source of energy for the body in ketosis.
There is no evidence that keto pills can help prevent keto flu, and symptoms of this usually resolve within a few days as your body adjusts. While there is some research to suggest that taking exogenous ketones can boost ketone concentrations in the blood quickly, there is insufficient evidence to prove that this has an effect on weight loss.
One small 2021 study found that obese people who followed a low-calorie ketogenic diet and took a BHB salt supplement experienced enhanced ketosis. However, higher ketone levels did not seem to boost weight loss compared to those on the keto diet without the supplement.
The body also seeks to maintain an even level of ketones to prevent a toxic buildup in the bloodstream. When the body senses high ketone levels, the liver stops producing its own and will try to flush out the excess ketones, so supplements may simply be expelled from the body.
Warnings
The Food and Drug Administration does not approve dietary supplements, so there is a chance that what's in the bottle is not what's on the label, and there may be contaminants. Experts do not recommend keto pills or any diet pills. There is also a risk of scams with some keto products, especially those pushed on social media.
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Ketosis and how to achieve it
Ketosis is a metabolic state in which the body uses stored fat as its primary fuel source instead of glucose. This process is called ketogenesis, and it involves the liver breaking down stored fat into molecules called ketones. Ketosis is achieved by restricting carbohydrate intake, moderating protein consumption, and increasing calories obtained from fat.
How to Achieve Ketosis
- Reduce Carbohydrate Intake: Carbohydrates should be limited to 20-50 grams per day, or even less for some individuals. This restriction forces the body to use fat, not glucose, as its primary energy source.
- Increase Physical Activity: Exercise helps deplete the body's glycogen stores (a form of glucose). With reduced carbohydrate intake, the body will turn to fat as a source of fuel.
- Fasting for Short Periods: Intermittent fasting can aid in reaching ketosis. Short periods of fasting (e.g., 24-48 hours) can be effective, but most people can achieve ketosis with shorter fasts.
- Increase Healthy Fat Intake: Replacing carbohydrates with healthy fats like avocados, avocado oil, and fatty fish such as salmon is recommended. However, limit saturated and trans fats from fried foods.
- Test Ketone Levels: Testing ketone levels in the blood, urine, or breath can help track progress and make adjustments to the diet.
- Check Protein Intake: Protein intake should be adequate but not excessive. The recommended amount varies, but a standard suggestion is around 1 gram of protein per pound of body weight per day.
- Consume More MCT Oil: Medium-chain triglycerides (MCTs), found in MCT oil, can help achieve ketosis even with a higher protein and carb intake.
Potential Risks and Considerations
- Challenging to Achieve and Maintain: Ketosis can be challenging to achieve and may take a few days to a week or more to enter. It requires strict dietary adherence and may be unsustainable for some.
- Potential Health Risks: Ketosis is not safe for everyone. Prolonged periods of ketosis can have adverse effects, especially for people with type 1 diabetes, as it increases the risk of ketoacidosis.
- Lack of Long-Term Research: There is limited research on the long-term effects of ketogenic diets, and they may lead to fatigue and nutritional deficiencies.
- Other Considerations: Before starting a ketogenic diet, consult a healthcare professional, especially if you have underlying health conditions, are pregnant or breastfeeding, or are taking medication.
While ketosis may offer weight loss and health benefits, it is important to approach it with caution and under the guidance of a healthcare professional. Achieving and maintaining ketosis requires a strict low-carbohydrate, high-fat diet, and it may not be suitable or sustainable for everyone.
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Keto-friendly foods
The keto diet is a low-carb, high-fat, moderate-protein diet. It involves reducing your daily carbohydrate intake to between 20 and 50 grams, depending on your body size, to reach a state of ketosis, where your body burns fat for energy instead of glucose.
Animal Proteins
Fish and shellfish are excellent choices on the keto diet. Salmon and other fatty fish like sardines, mackerel, and albacore tuna are rich in B vitamins, potassium, selenium, and omega-3 fats, which have been linked to improved insulin sensitivity. Other types of seafood like shrimp and crab are also carb-free.
Meat and poultry are considered staples on the keto diet as they contain no carbs and are rich in B vitamins and minerals. When choosing meat, opt for grass-fed varieties as they have higher levels of omega-3 fats and conjugated linoleic acid (CLA).
Eggs are another great source of protein and are very low in carbs. They also promote feelings of fullness and contain antioxidants that support eye health.
Dairy and Dairy Alternatives
Cheese is a keto-friendly food as it is low in carbs and high in fat and protein. Plain Greek yogurt and cottage cheese are also good options as they are high in protein and calcium. Cream and half-and-half are also suitable, but they should be consumed in moderation.
Unsweetened plant-based milk like soy, almond, and coconut milk are also keto-friendly choices, but be sure to avoid oat milk as it is too high in carbs.
Green Leafy Vegetables
Green leafy vegetables are excellent for keto as they are extremely low in carbs and rich in vitamins, minerals, and antioxidants. Some options include spinach, kale, collard greens, lettuce, arugula, and escarole.
High-Fat Veggies
Avocados and olives are unique among vegetables as they are high in healthy fats and low in net carbs. They also contain fiber and various nutrients that offer health benefits.
Other Non-Starchy Vegetables
Cauliflower, broccoli, green beans, bell peppers, zucchini, and spinach are some examples of low-carb, nutrient-dense vegetables that can be easily incorporated into keto meals.
Other Plant-Based Foods
Nuts and seeds are healthy additions to a keto diet as they are high in fat and low in net carbs. Berries are also a good choice as they are low in carbs and high in fiber and antioxidants. Dark chocolate and cocoa powder can also be enjoyed in moderation, but opt for varieties with a minimum of 70% cocoa solids.
Fats and Oils
Olive oil, butter, ghee, avocado oil, and coconut oil are excellent choices for cooking and baking on the keto diet. They are high in healthy fats and contain no carbs.
Beverages
Unsweetened coffee and tea are carb-free and can be enjoyed on the keto diet. They may also offer health benefits like improved alertness and a reduced risk of diabetes. Unsweetened sparkling water is another good option if you're looking for a keto-friendly alternative to soda.
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Weight loss expectations
The ketogenic, or keto, diet is a low-carb, high-fat eating plan that has become extremely popular in recent years. The keto diet can be an effective way to lose weight, but it is not necessarily a superior method when compared to traditional diets. While the keto diet has been linked to weight loss, the exact mechanisms are unclear.
Calorie Deficit
To lose weight, an individual must eat fewer calories than they burn, also known as a calorie deficit. The keto diet is often associated with a calorie deficit because it restricts carbohydrates, which are a large contributor to calorie intake.
Reduction in Hunger Levels
The keto diet has been linked to decreased levels of ghrelin, a hormone that regulates hunger. Lower levels of ghrelin can lead to reduced food and alcohol cravings, causing a decrease in overall calorie intake.
Loss of Water Weight
The significant reduction in carbohydrate intake on the keto diet leads to a loss of water weight. Carbohydrates hold water in their stored form in the body, so when you reduce your carb intake, stored carbs are released along with additional fluid, resulting in weight loss.
Increased Calories Burned
Some studies suggest that the keto diet may be associated with a small increase in the number of calories burned, but this does not necessarily lead to increased body fat loss compared to a traditional diet.
Other Factors to Consider
When following the keto diet for weight loss, it is important to consider your specific carb intake, sleep and exercise routines, and the sustainability of the diet.
- Carb intake – Keeping track of your daily carb intake ensures that you enter ketosis quickly and avoid symptoms of the "keto flu," which can include headaches and brain fog. Most people should eat less than 50 grams of carbs per day to stimulate ketosis.
- Sleep – A lack of sleep and chronic stress can negatively impact weight loss. Studies suggest that insufficient sleep can affect hunger hormones, leading to increased appetite and counteracting the hunger-reducing effects of the keto diet.
- Exercise – While the keto diet alone may lead to weight loss, combining it with an exercise regimen can enhance this effect. When adapted to the diet, your body can use fat as its primary fuel source for exercise, which is especially beneficial for endurance-based sports.
- Sustainability – One of the main downsides of the keto diet is its long-term sustainability due to its restrictive nature. It can be challenging to adhere to the diet, especially when dining out or during social gatherings.
Weight Loss Results
The keto diet can lead to weight loss, but the rate of loss may vary from person to person. While it may be tempting to aim for ambitious weight loss goals, experts recommend losing 1-3 pounds or about 0.5-1 kg per week as a healthy and sustainable rate.
Additionally, it is important to remember that when starting the keto diet, much of the initial weight loss is due to a loss of water weight. This can result in a rapid drop on the scale, but it is not indicative of fat loss.
Keto Supplements
Keto supplements, such as MCT oil and exogenous ketones, claim to help boost energy, burn fat, and promote weight loss. However, there is limited research on the efficacy of these supplements, and they should not be solely relied upon for weight loss.
Overall Recommendations
While the keto diet can be an effective tool for weight loss, it is not a quick fix. It requires careful planning, a commitment to a low-carb lifestyle, and may be challenging to maintain in the long term. Combining the keto diet with a reduced-calorie Mediterranean-style diet and increased physical activity can help manage weight loss over time.
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Keto diet sustainability
The keto diet is a low-carb, high-fat approach to weight loss that is widely popular but challenging to maintain. While it can lead to faster weight loss compared to a calorie-reduction diet, it is not easy to sustain, and there are concerns about potential health risks. Here are some key considerations regarding the sustainability of the keto diet:
Restrictive Nature and Difficulty
The keto diet is extremely restrictive, requiring a significant reduction in carbohydrate intake to as low as 5% of total calories. This means cutting out many healthy foods, including fresh fruits, whole grains, and low-fat dairy, which can be challenging and may not be sustainable for the long term. The strict nature of the diet can also lead to social isolation and disordered eating.
Potential Health Risks
The high fat intake associated with the keto diet, especially saturated fats, can increase the risk of heart disease. It may also lead to nutrient deficiencies, liver and kidney problems, constipation, and fuzzy thinking or mood swings. These risks are heightened by the fact that the diet is often followed without proper medical supervision.
Weight Regain
Even if weight loss is achieved on the keto diet, it may not be sustainable. The weight lost initially is mostly water weight, and once a normal diet is resumed, the weight is likely to return. Therefore, the keto diet may not be an effective long-term solution for weight management.
Alternative Approaches
Instead of restrictive diets like keto, a balanced diet of fresh foods, portion control, and regular exercise is recommended for healthy and sustainable weight loss. Making gradual, consistent changes and adopting a Mediterranean-style diet with reduced calories can lead to better long-term weight management.
Individual Variation
It is important to recognize that the effectiveness of the keto diet can vary from person to person. While some people may experience successful weight loss, others may struggle due to individual differences in metabolism, medical conditions, stress levels, sleep quality, and physical activity.
In conclusion, while the keto diet may lead to initial weight loss, it is not a sustainable or recommended approach due to its restrictive nature, potential health risks, and likelihood of weight regain. Prioritizing a balanced diet, portion control, and physical activity is a more sustainable strategy for long-term weight management. Consulting with a healthcare professional before starting any diet is always advisable to ensure it aligns with individual needs and health status.
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Frequently asked questions
The keto diet is a low-carb, high-fat diet. It involves reducing your daily carbohydrate intake to 20-50 grams, which forces your body to use fat as its main source of energy instead of glucose.
The keto diet forces your body into a state of ketosis, where it becomes very efficient at burning fat for energy. This is achieved by drastically reducing carbohydrate intake and increasing fat intake to around 70-90% of calories.
The keto diet has been shown to be effective for weight loss, but it may not be sustainable in the long term. While it can lead to faster weight loss compared to a calorie-reduction diet, it can be challenging to maintain and may not be suitable for everyone. Some people may also experience negative side effects, such as "keto flu," which includes symptoms like fatigue, mental fogginess, and irritability.