Dante Carrillo
The Atkins and keto diets are two of the most popular low-carb diets. Both diets aim to promote weight loss and improve cholesterol levels and blood sugar management. However, they have distinct differences. The ketogenic diet is extremely restrictive and may be difficult to stick to in the long term. On the other hand, the Atkins diet is less restrictive and may be easier to maintain, but it also has a more complex structure with multiple phases.
| Characteristics | Values |
|---|---|
| Carbohydrate restriction | Atkins: Carb restriction initially, then gradual increase. Keto: Carb restriction throughout. |
| Phases | Atkins: Four phases, including Induction, and Lifetime Maintenance. Keto: One way of eating throughout. |
| Ketosis | Atkins: Ketosis likely in the first two phases. Keto: Ketosis throughout. |
| Weight loss | Atkins: Modest weight loss, some regained by the end of year two. Keto: More weight loss in the short term, but may be harder to stick to long-term. |
| Protein intake | Atkins: Allows moderate protein intake. Keto: Restricts protein intake to 20% of calories. |
| Sustainability | Atkins: May be easier to stick to long-term. Keto: Very restrictive, may lead to nutrient deficiencies. |
| Health benefits | Atkins: May improve cholesterol levels. Keto: May improve heart health, brain function, and blood sugar management. |
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What You'll Learn
Ketogenic diet restrictions
The ketogenic diet is a high-fat, moderate-protein, and very low-carbohydrate diet. Carbohydrates are the body's preferred source of energy, but on a strict ketogenic diet, about 5% to 10% of energy intake is from carbohydrates. The reduction of carbohydrates puts the body into a metabolic state called ketosis, where the body starts breaking down stored fat into molecules called ketone bodies to use for energy.
The keto diet is extremely restrictive and may be difficult to stick to. Limiting your protein intake to 20% of calories while maintaining a very low-carb and very high-fat intake can be challenging, especially in the long term. Some people may also feel the need to monitor their ketone levels, which can be challenging and costly.
On the keto diet, it is recommended to limit your intake of high-carb foods like dried fruits, refined carbs, sweet sauces, and reduced-fat foods. High-fat foods like red meats, fatty fish, nuts, cheese, and butter are encouraged. It is also important to limit high-fibre foods, which can be challenging as they have long-term health benefits.
The ketogenic diet has been shown to be effective for weight loss, especially in the short term. However, there is limited evidence on the long-term safety or effectiveness of the keto diet, so its long-term health risks are unknown. Most people can reap several of the benefits of low-carb diets without being in ketosis. Therefore, a moderate carb restriction on a low-carb diet may be sufficient.
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Atkins diet restrictions
The Atkins diet is a low-carbohydrate diet that was introduced in 1972 by Dr. Robert Atkins, a cardiologist. It is a popular weight-loss diet that has been used worldwide. The diet involves a multiphase approach, with the first phase being the most restrictive. During this initial phase, net carb intake is restricted to 20-25 grams per day, with a focus on consuming lean protein and low-carb vegetables. As the diet progresses, higher-carb foods such as fruits and legumes can be slowly reintroduced, and eventually, one can add back nutritious foods like quinoa, oatmeal, and more fruits.
The Atkins diet is broken down into four phases, each with specific guidelines and restrictions. The first phase, as mentioned, is the most restrictive, with a focus on kickstarting weight loss by limiting net carbs to 20-25 grams per day. In this phase, it is recommended to consume three 4-6 ounce servings of lean protein, such as salmon and chicken breast, and low-carb vegetables like greens, mushrooms, and broccoli. It is also important to stay hydrated by drinking at least eight ounces of water and eating three full meals or four to five smaller meals daily.
In the second phase, small amounts of berries, legumes, and other higher-carb foods can be introduced. High-fat dairy products, such as heavy cream, can also be incorporated. It is important to continue choosing low-carb, low-calorie beverages during this phase. As you progress through the phases, you can gradually add more carbs to your diet, with the goal of reaching a weight that is within 15 pounds of your goal weight. By the end of the final phase, you should be consuming 30-80 grams of net carbs per day.
The Atkins diet is known for its severe restriction of carbohydrate intake, especially in the initial phases. This restriction includes avoiding high-carb foods such as pasta, cake, bread, grains, fruits, legumes, and potatoes. However, it is important to note that the Atkins diet does not involve counting daily calories or limiting fat intake. Instead, the focus is on restricting carbs and consuming adequate protein and fat.
While the Atkins diet has been shown to be effective for weight loss, it is not without its restrictions and potential drawbacks. One of the main restrictions is the limited consumption of carbohydrates, which can be challenging for some individuals. Additionally, the Atkins diet may put individuals at risk of not getting enough fiber, which is important for protecting against heart disease and certain types of cancer, regulating appetite, and supporting gut health. The high saturated fat content of the Atkins diet may also raise LDL ("bad") cholesterol levels, potentially increasing the risk of heart disease. Furthermore, restrictive diets like Atkins have been associated with an increased likelihood of developing disordered eating habits. It is important for individuals with high cholesterol or an increased risk of heart disease to monitor their cholesterol levels while on the Atkins diet. People with diabetes, kidney disease, or pregnant women should consult their doctors before considering the Atkins diet.
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Weight loss results
The Atkins and keto diets are both low-carb diets, and following them strictly will most likely lead to weight loss. Both diets may result in weight loss by decreasing the number of calories consumed. However, there are some key differences between the two diets that can affect weight loss results.
The keto diet is a high-fat, low-carb, and moderate-protein diet that aims to put the body into a state of ketosis, where it burns fat for fuel instead of glucose. The diet is more restrictive than Atkins and may be difficult to stick to in the long term. Those on the keto diet may experience rapid weight loss, and research indicates that being in ketosis decreases appetite, removing the barrier of constant hunger that can hinder weight loss. A 2014 12-month study found that participants on a low-calorie keto diet lost about 44 lbs, with minimal muscle mass loss.
The Atkins diet, on the other hand, is a high-fat, high-protein, and low-carb diet. It is broken down into four phases, with the first phase focusing on kickstarting weight loss by reducing carb intake to around 20-50 grams per day. The later phases of the Atkins diet allow for more carbohydrates, with up to 100 grams of net carbs permitted in the fourth phase. This diet may be easier to stick with long-term due to its gradual reintroduction of carbohydrates and fewer side effects. However, weight loss may occur at a slower rate compared to keto. Past research found that after one year, people who followed Atkins lost a modest amount of weight (4.6 to 10.3 lbs), with some weight regain by the end of the second year.
Ultimately, both diets can be effective for weight loss, but the best diet is one that is sustainable for the individual in the long term. It is always recommended to consult with a healthcare professional or dietitian before starting any new diet.
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Health benefits
The Atkins and Ketogenic diets are both low-carb diets that can lead to weight loss. However, they have distinct differences and health benefits.
The Atkins diet is a multiphase programme that gradually reintroduces carbohydrates. This makes it less restrictive than keto and easier to stick to long-term. The diet has been linked to fewer side effects than keto. It can lead to rapid weight loss, especially in the short term.
The keto diet can lead to quick, dramatic weight loss, as it puts the body into a state of ketosis, burning fat instead of glucose. It may also preserve muscle mass, meaning weight loss is more likely to be fat loss. The diet was first developed in the 1920s as a treatment for epilepsy. It has also been shown to improve brain function in people with Alzheimer's.
Low-carb diets have been associated with improved mental health and digestion, although more research is needed. They can also benefit blood sugar regulation and may be a safe and effective option for people with type 2 diabetes, reducing the need for medication.
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Sustainability
The Ketogenic diet, or "keto", is a very low-carb, moderate protein, and high-fat diet plan. The goal is to reach and maintain a metabolic state of ketosis, where the body uses fat, rather than sugar from carbs, as its main energy source. To reach and stay in ketosis, most people need to limit their total carb intake to 20-50 grams per day, or 5-10% of total daily calories. This can be challenging, as it may require strict monitoring and, sometimes, medical supervision. The keto diet was initially developed to treat children with epilepsy, but it has since become popular for weight loss. While it can lead to rapid weight loss, it may be difficult to maintain, and it can also lead to deficiencies in essential vitamins and minerals, commonly referred to as "the keto flu".
The Atkins diet, on the other hand, is a multiphase approach, with the first phase involving eating only 20-25 grams of net carbs per day. In later phases, the Atkins diet allows for a gradual increase in carbs, up to a personal carb balance amount. This means that Atkins may be more sustainable in the long run because it is not as restrictive as keto and does not require the body to remain in ketosis. Additionally, on Atkins, you can eventually add back nutritious foods like quinoa, oatmeal, and fruit. However, like keto, Atkins can also be restrictive and may result in nutrient deficiencies.
Overall, when considering the sustainability of a diet, it is important to find an approach that works for your individual needs and preferences. Both keto and Atkins can be challenging to maintain due to their low-carb nature, but Atkins may offer more flexibility and a greater variety of food choices, making it a more realistic long-term option for some individuals. Working with a nutritionist or dietician can help determine which diet, or an entirely different one, is best suited to one's needs and capabilities.
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Frequently asked questions
Both diets are low-carb diets that aim to get your body to enter ketosis by limiting your carb intake and focusing on burning fat instead of sugar as your energy source.
The Ketogenic diet is more restrictive than the Atkins diet as it limits both your carb and protein intake. The Atkins diet, on the other hand, allows for a gradual increase in carbs and has less restriction on protein intake. The Ketogenic diet follows one way of eating throughout, whereas the Atkins diet is broken down into four phases.
Both diets can lead to weight loss, but the Ketogenic diet may be more effective in the long term as it keeps you in ketosis all the time. A 2014 review found that the Atkins diet resulted in the most weight loss after 6 months, but some of the weight was regained by the end of the second year.
The Atkins diet may be easier to stick to in the long term as it allows for more flexibility with carb and protein intake. The Ketogenic diet is very restrictive and may lead to nutrient deficiencies if not carefully managed.
