Skip to main content

Everything you need to know about the Atkins diet

Your complete guide to this weight loss diet

A bowl of a keto-friendly dish on a table
Sea Wave / Shutterstock

Are you looking to improve your health and have a good fitness routine in place but don’t know what to eat? With so many diet options out there, it can be difficult to know which one is optimal for you and your goals. Fad diets come and go, but more reliable eating methods like the Atkins diet are still around, and for good reason.

Designed for those wanting to lose weight and lower their blood pressure, the Atkins diet takes a low-carb approach. Keep reading to learn how to follow the Atkins diet, its potential benefits and downsides, and more.

Recommended Videos

What is the Atkins diet?

Eggs on avocado toast
Jane Doan / Pexels

Cardiologist Robert Atkins created this diet because he viewed carbs as the major culprit of weight gain and other health issues. The objective is to alter metabolism by burning fat for energy instead of carbs. This can be implemented as a four-phase diet consisting of reduced carb intake and the “net carbs” system based on the difference between total carbs and fiber content.

With Phase 1, you are aiming for fast weight loss and are allowed to have 20 grams of net carbs in a day. This is followed by Phase 2, in which weight loss occurs more slowly, and Phase 3, where you reach your desired weight goal. By the fourth phase, you would have increased your carb intake to 120 grams from the initial 20 grams, and you would do this as long as you were maintaining your target weight.

What are the benefits of the Atkins diet?

Man running outside
Pixabay / Pexels

Weight loss

As your body uses fat stores for energy, you may start seeing weight loss. Protein and healthy fat sources like fatty fish and olive oil can help boost satiety, while fiber-dense carbs will keep you feeling full for longer, helping to curb cravings and prevent overeating. Be mindful of your net carbs, in which you may opt for a food with four grams total that contains two grams of fiber, resulting in a net carb value of two.

Fiber is essential for cleaning out the gut and improving function by supporting good bacteria. A healthy and efficient gut can attenuate blood sugar and appetite. These positive effects on metabolism and energy are key for losing weight. 

Glycemic control

The lower carb intake of the Atkins diet can help regulate blood sugar. Many carbohydrates are high-glycemic foods that cause blood glucose levels to spike and result in hyperglycemia. If this is unmanaged, it can lead to long-term complications related to nerve damage as well as kidney damage.

The higher protein content makes this diet helpful in diabetes management, and increased intake of healthy fats also supports improved conditions. Some studies have shown that adherence to a low-fat diet has caused adverse glycemic effects in individuals with diabetes. On a low-fat diet, healthy fats are often replaced by unhealthy carbs that raise blood sugar and don’t fulfill satiety. 

Heart health

Adhering to the Atkins diet may cause better heart health. With weight loss, there may also be decreased blood pressure and improved total cholesterol. In some instances, there were positive changes in triglyceride levels.

The results of some studies suggest that a low-carb diet can reduce the risk of heart disease by increasing HDL cholesterol and reducing triglycerides over one year. There have also been reports of reduced triglycerides and improved aortic stiffness over time. 

Neurological function

The Atkins diet has some aspects that are ketogenic in nature, which can make it desirable for ameliorating neurological conditions like migraines, headaches, Alzheimer’s, and dementia. 

Some research suggests that altering the fuel source for the brain by shifting from carbs to fat may help balance its function and excitability. Greater amounts of fat and less sugar have been noted as a great way to alter the excitability of the brain and reduce the possibility of seizures. 

What can you eat on this diet?

An egg, blueberries, almonds, and avocado
Jenna Hamra / Pexels

The biggest aspect of the Atkins diet is controlling carb intake. High-fiber vegetables and other plant foods have been added to a modified Atkins diet to account for vegetarian and vegan needs, as well as to address health issues. In addition to fiber-rich plant foods, consider choosing eggs, fish, and olive oils as accepted foods, with some whole grains, fruits, and nuts being added in after phase one. 

What foods are restricted on this diet?

Slices of sourdough bread
Cats Coming / Pexels

On the Atkins diet, you’ll be omitting heavy carbs like pasta, bread, and sugar-based snacks. Certain restrictions vary depending on which phase you’re in. The first phase restricts nuts and fruits, with these items being reintroduced slowly by phase two and whole grains added by the third phase. 

Are there any possible adverse effects?

Fish steak on a plate
Kostiantyn Vierkieiev / Unsplash

Ketosis-related issues

When you consume fewer than 20 grams of carbs a day, you’re unable to use glucose for energy, and your body breaks down fat stores for fuel. As a result, your body enters ketosis, causing an accumulation of ketones. When this happens, you may experience migraines, nausea, and fatigue. 

At the risk of other complications, consult a professional if you have kidney troubles or take medications for diabetes or diuretics. 

Processed foods

Several ready-made foods are promoted on the Atkins diet. This includes shakes and convenience bars, many of which contain sodium and artificial sweeteners, as well as processed ingredients. Meats like ham and bacon are processed with sugar and contribute to carbohydrate count.

While some processed foods are included, some healthier carbs are often left behind to avoid exceeding the limits. This could mean some fruits and vegetables are excluded from the diet, which can lead to nutrient depletion. These are carb sources that contain antioxidants and phytonutrients that provide health benefits, so complications could result from their omission. 

Weight regain

With fast weight loss diets, we often see temporary weight reductions and regained weight because the eating pattern may not be suitable or sustainable for your lifestyle. Some research suggests that Atkins may be beneficial for short-term weight loss of up to six months and possibly for longer-term or greater than one year. Be mindful that as you cut carbs out and rely on the other macronutrients, overloading with great amounts of fat and protein may still cause weight gain.

Example meal plan

Chicken and asparagus
Harry Dona / Pexels
  • Breakfast: Salmon croquettes
  • Lunch: Kale salad with turkey, eggs, and olive oil 
  • Snack: Almonds
  • Dinner: Grilled chicken with asparagus, herbs, and lemon juice

Frequently asked questions

FAQ picture letters wooden shelves
Ready Elements / Pixabay

Are you supposed to exercise on the Atkins diet?

While the Atkins diet technically claims that you don’t need to exercise to get the desired outcome of weight loss, it is still recommended that you exercise. Regular movement contributes to overall health and wellness, and the CDC suggests that adults complete at least 150 minutes of moderate-intensity cardio and two days of strength training every week.

Is Atkins good for losing belly fat?

Unfortunately, no diet or form of exercise can target belly fat directly. However, weight loss is a claimed benefit of the Atkins diet, so if you are adherent, you will lose fat throughout your body. Eventually, your belly fat will be lost as well, but factors like genetics determine how quickly this happens. Some people store fat in their abdomen area more than others.

Christine VanDoren
Christine is a certified personal trainer and nutritionist with an undergraduate degree from Missouri State University. Her…
New study reveals hack to make you more active and level up performance
Increase your physical activity with this simple hack
Man doing lateral raises

While many of us want to be more active, it’s easier said than done, especially with our busy schedules. Sometimes we might set goals and go all in, only to fizzle out weeks later due to our mounting responsibilities. If you’re truly staying dedicated to your fitness plan, give yourself a pat on the back and be proud, because you’ll get plenty of health benefits as a result of your efforts and commitment.

When we put in the effort, we want to get the most out of our workouts and optimize our gym time. Recently, researchers revealed a simple hack that doesn't involve exercise, but it could still increase workout performance, make you more active, and help you get more out of your workouts, which definitely piqued my interest. Let’s check out the research. What’s the hack? Earlier bedtimes.

Read more
Eating organic can be difficult: Did Green Chef make it easier?
Should you try Green Chef?
Green Chef

There are many meal delivery service options out there, but which one is actually worth the money and your consideration? If you are more health-conscious and quality ingredients are a priority for you, Green Chef may be a great option.

I had the pleasure of trying out Green Chef’s meal service, so I am able to share my honest, firsthand experience with you. Keep reading to learn if going organic really matters, what makes Green Chef stand out, the company’s pros and cons, and more!

Read more
7 high-protein snacks you can grab anywhere while traveling
Beef jerky, protein shakes, and more
protein bar

A high-protein diet offers numerous benefits, including supporting healthy hormone levels and facilitating muscle-building efforts. As a personal trainer and nutritionist, I encourage all my clients to prioritize protein at every meal, no matter their fitness goals.

While you may be in a solid routine at home when it comes to your meal prep and hitting your daily goals, getting in enough protein while traveling can be a challenge. Keep reading to discover seven high-protein snacks on the go that you can try!

Read more