
The Atkins diet is a low-carb diet, usually recommended for weight loss. It was developed by Dr. Robert Atkins in 1972 and involves four phases, beginning with ketosis for weight loss and then sustaining a healthy weight with a moderate level of carbohydrates. The diet restricts net carbs and emphasizes eating protein and healthy fats. There are different plans within the Atkins diet, such as Atkins 20, Atkins 40, and Atkins 100, which vary in the number of carbs allowed and the flexibility of food choices. This article will provide a sample diet for the Atkins 20 plan, which is the most restrictive of the three.
| Characteristics | Values |
|---|---|
| Carbohydrate intake | Initially limited to 20g per day for 2 weeks, then gradually increased but typically not exceeding 100g per day |
| Protein intake | High |
| Fat intake | High |
| Vegetable intake | Low-carb vegetables such as leafy greens |
| Fruit intake | Select fruits are allowed in the Atkins 40 plan |
| Plan duration | 3-week sample menu available |
| Weight loss | Aids weight loss |
| Health benefits | May benefit diabetes management and heart health |
| Versions | Atkins 20, Atkins 40, Atkins 100 |
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What You'll Learn

Atkins 20, 40, and 100
The Atkins diet is a low-carb diet, usually recommended for weight loss. It involves eating as much protein and fat as desired while avoiding foods high in carbs. The Atkins 20, 40, and 100 are different variations of the diet, each with its own set of guidelines and restrictions.
Atkins 20:
Atkins 20 is a more structured and restrictive version of the Atkins diet. The initial phase, known as Induction, is designed to jumpstart weight loss and change the way the body uses nutrients. During this phase, individuals are limited to a maximum of 20 grams of net carbohydrates per day and are advised to consume high-fat, high-protein foods with low-carb vegetables like leafy greens. This phase can last for two weeks or longer, depending on the individual's weight loss goals.
Atkins 40:
Atkins 40 is a more flexible and less restrictive version of the Atkins diet. It involves eating 40 grams of net carbs per day and offers a wider variety of food choices from the start. This plan is suitable for those with less weight to lose, as well as pregnant or breastfeeding women. During Phase 2 of Atkins 40, individuals can start adding more carbs in 10-gram increments by increasing their portion sizes.
Atkins 100:
Atkins 100 is considered a lifestyle approach rather than a structured diet plan. It involves consuming no more than 100 net carbs per day and focuses on maintaining a healthy weight in the long term. A sample meal plan for Atkins 100 might include meals such as Atkins Frozen Meat Lasagna with mixed greens and vegetables for lunch, and Popcorn Garlic Shrimp with steamed broccoli, cauliflower, and brown rice for dinner.
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Induction phase
The induction phase of the Atkins diet is all about changing the way your body uses nutrients and kick-starting your weight loss journey. The length of the induction phase depends on your weight loss goals. For some, this phase may only last two weeks, but you can safely follow it for longer if you have more weight to lose or want to lose weight quickly. You'll stay in this phase until you're 15 pounds away from your goal weight.
During the induction phase, you will reduce your daily net carb intake to an average of 20 grams a day, with 12-15 grams coming from foundation vegetables like leafy greens and other non-starchy vegetables. You can eat up to 22 grams of net carbs in a single day, but it's important not to drop below 18 grams as this won't make you lose weight faster and may not satisfy your vegetable requirements. You can also consume three 4-6 ounce servings of protein each day and 3 tablespoons of added fat daily, two of which can be replaced with coffee or tea. Remember that consuming fat is essential to the Atkins diet as it heightens the flavour of foods and enables your body to absorb certain vitamins.
It's important to never go more than three to four hours without eating during the day. You can have five or six small meals to ensure you don't get too hungry, but always accompany a carb snack with either fat or protein. For example, you could have cucumber slices with a piece of cheese.
The induction phase is a significant shift in your diet, and you may feel hungry or out of sorts for the first few days until your body adjusts to burning fat for fuel. This usually takes about 48 hours.
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Sample low-carb menu
The Atkins diet is a low-carb diet, usually recommended for weight loss. It was originally promoted by Dr. Robert C. Atkins, who wrote a best-selling book about it in 1972. The diet involves eating 100g of net carbs per day.
Breakfast
- Eggs cooked in butter or olive oil
- Bacon or sausage
- Tomatoes or spinach
- Coffee or tea with a small amount of milk and sweetener, if desired
Lunch
- Chicken or tuna salad with leafy greens, avocado, and a vinaigrette dressing
- A small number of nuts, such as almonds or macadamia nuts
Dinner
- Fatty fish, such as salmon, cooked in butter or olive oil
- Steamed broccoli or cauliflower with butter
- Spinach salad with vinaigrette dressing
- For dessert, a small serving of berries with whipped cream
Snacks
- Cheese
- Nuts
- Low-carb vegetables, such as celery or cucumber
It is important to note that this is just a sample menu and the specific foods and portions may vary depending on individual needs and preferences. It is always a good idea to consult a registered dietitian or physician before starting a new weight-loss diet plan.
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Weight loss goals
The Atkins diet is a low-carb diet, usually recommended for weight loss. The amount of carbs you eat each day depends on the phase of the diet you're in and your weight loss goals.
Phase 1, also known as the induction phase, involves consuming under 20 grams of carbs per day for 2 weeks. This phase is meant to kick-start your weight loss journey by changing the way your body uses nutrients. The length of this phase depends on your weight loss goals. You can stay in this phase until you're 15 pounds away from your goal weight. During this phase, you can eat high-fat, high-protein foods with low-carb vegetables like leafy greens.
In Phase 2, you slowly add more nuts, low-carb vegetables, and small amounts of fruit back into your diet. This phase continues until you are within 5-10 pounds of your target weight. You increase your carb intake by 10 grams each week.
Phase 3 is when you are very close to your goal weight. Here, you can add more carbs to your diet until weight loss slows down.
Phase 4 is the maintenance phase, where you can eat as many healthy carbs as your body can tolerate without regaining weight.
It's important to note that the Atkins diet may not be suitable for everyone. Consult a doctor or registered dietitian before starting this or any other weight-loss diet to ensure it aligns with your individual health needs. Additionally, restrictive diets can increase the risk of developing disordered eating habits, and people with certain medical conditions should carefully monitor their health while on this diet.
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Eating out
Firstly, it is important to be cautious when ordering. Ask for extra vegetables instead of bread, potatoes, or rice, and request a meal based on fatty meat or fatty fish. It is also a good idea to ask for some extra sauce, butter, or olive oil with your meal to increase your healthy fat intake.
When dining out, opt for a meat- or fish-based main dish. This will help you avoid carb-heavy options and ensure you get enough protein. It is also a good idea to choose a dish that includes plenty of low-carb vegetables, such as leafy greens. Be mindful of portion sizes, as they can be very large in restaurants.
It is important to check the ingredient labels of foods and be mindful of your carbohydrate allowance. For example, if you are following the Atkins 20 plan, your initial "induction" phase limits you to 20 grams of net carbohydrates per day. This means that even carb-dense whole-grain foods are not recommended until you reach the maintenance phase.
Some common Atkins substitutions that can be made at various types of restaurants include ordering a bunless burger or sandwich, choosing a salad with grilled chicken or shrimp, or opting for a steak with vegetables instead of potatoes.
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Frequently asked questions
The Atkins diet is a low-carb diet, usually recommended for weight loss. It was developed by Dr. Robert Atkins in 1972. The diet involves restricting net carbs and emphasising protein and healthy fats.
Atkins defines net carbs as grams of carbs minus grams of fibre and sugar alcohols. Net carbs do not include carbs from vegetables.
Atkins 20 and Atkins 40 are the two main plans, which involve various phases. Atkins 100 is considered a lifestyle approach, allowing up to 100g of net carbs per day.
A sample daily meal plan for the Atkins diet could include:
- Breakfast: Eggs, bacon, and coffee
- Lunch: Chicken salad with olive oil and avocado
- Dinner: Fatty fish like salmon, with vegetables
- Snacks: Cheese, nuts, berries, or other low-carb options











































