Does Keto Diet Work? Expert Opinion And Scientific Evidence


Hello and welcome to this comprehensive and informative article on the topic, “Does Keto Diet Work?” If you are reading this, chances are that you are considering or already following the keto diet, and you want to know if it’s worth the effort. Well, you’ve come to the right place. In this write-up, we will break down everything you need to know about keto diet, how it works, its benefits and potential drawbacks, and what the experts and scientific studies have to say about its effectiveness. So, let’s dive in!

What Is Keto Diet?

The ketogenic diet (or keto, for short) is a low-carb, high-fat diet that was originally developed in the 1920s to treat epilepsy in children. It works by putting your body in a state of ketosis, where it burns fat for fuel instead of carbohydrates. The typical macronutrient ratio on the keto diet is 70-80% fat, 20-25% protein, and 5-10% carbs. This means that you’ll be eating lots of fatty foods like butter, oil, cheese, and nuts, while avoiding or minimizing sugary and starchy foods like bread, pasta, rice, and fruits.

How Does Keto Diet Work?

The basic principle behind the keto diet is that by limiting your carbohydrate intake, you force your body to switch from using glucose (derived from carbs) as its primary energy source to using ketones (produced by the liver from stored fat) instead. This metabolic shift has several benefits, including:

Benefits of Keto Diet Explanation
Weight loss By reducing insulin levels and increasing fat burning, keto diet can help you lose weight faster and more sustainably.
Better blood sugar control Since keto diet lowers blood glucose and insulin, it can be a useful tool for managing diabetes and insulin resistance.
Improved cholesterol and triglycerides Keto diet can lower LDL (“bad”) cholesterol and raise HDL (“good”) cholesterol, while also reducing triglycerides.
Reduced inflammation Keto diet has been shown to lower markers of inflammation, which can improve various health conditions like arthritis and asthma.
Better brain function Since ketones are a more efficient fuel for the brain than glucose, keto diet may improve cognitive function and memory.

Does Keto Diet Work For Everyone?

Now that we know how keto diet works and what its potential benefits are, the question remains – does it work for everyone? The answer is, it depends. While keto diet can be effective for many people, it’s not a one-size-fits-all approach. Here are some factors that can influence the success of keto diet:

1. Individual metabolism

Some people may be more genetically predisposed to burning fat than others, which can affect how quickly they reach ketosis and how well they adapt to the diet.

2. Health goals

Depending on your health goals, keto diet may or may not be the best choice. For example, athletes who need quick bursts of energy may find it challenging to perform on a low-carb diet, while people with certain medical conditions (like gallbladder or liver disease) may need to avoid high-fat foods.

3. Compliance and sustainability

Like any diet, keto requires discipline and consistency to be effective. If you find it too restrictive or difficult to maintain, you may struggle to see results.

4. Net carbs vs. total carbs

Another factor to consider is whether you count net carbs (total carbs minus fiber) or total carbs on keto. Some people may be able to tolerate more carbs if they are coming from fiber-rich sources like vegetables and nuts.

5. Common mistakes

Lastly, it’s essential to avoid common mistakes that can hinder your progress on keto, such as not getting enough electrolytes, overeating protein, or not tracking your macros correctly.

Frequently Asked Questions About Keto Diet

1. Is keto diet safe?

For most healthy people, keto diet is considered safe and even beneficial. However, it’s not recommended for pregnant or breastfeeding women, children, or people with certain medical conditions without consulting their doctor.

2. How long does it take to see results on keto?

Most people start seeing significant weight loss and other benefits within a few weeks of starting keto. However, it can take longer for some people to reach ketosis and see noticeable changes.

3. Can you eat carbs on keto?

Yes, but in very limited quantities. Most people on keto aim to keep their carb intake below 50 grams per day, but some may be able to tolerate more or less depending on their individual needs.

4. Can you eat fruit on keto?

Yes, but only low-carb fruits like berries and avocado. High-sugar fruits like bananas and grapes are generally avoided on keto.

5. What can you eat on keto?

On keto, you can eat a variety of healthy fats like avocado, olive oil, and nuts, high-quality protein like meat, fish, and eggs, and low-carb vegetables like spinach, broccoli, and cauliflower.

6. What should you avoid on keto?

Avoid or minimize sugary and starchy foods like bread, pasta, rice, potatoes, and candy. Also, limit your intake of processed and fried foods.

7. Can keto diet cause ketoacidosis?

No, ketoacidosis is a dangerous metabolic state that can occur in people with uncontrolled diabetes or alcoholism. Keto diet is different from ketoacidosis and is considered safe when done correctly.

8. Can keto diet cure cancer?

There is no scientific evidence to support the claim that keto diet can cure cancer or prevent its recurrence. However, some studies suggest that it may be helpful as an adjuvant therapy in some cases.

9. Can keto diet cause constipation?

Yes, since keto diet is low in fiber, it can cause constipation in some people. To prevent this, make sure to eat plenty of non-starchy vegetables and drink enough water.

10. Can you do keto diet if you’re vegetarian or vegan?

Yes, but it can be more challenging to get enough protein and healthy fats on a plant-based diet. You may need to supplement with protein powder, nuts, and seeds.

11. Can keto diet cause hair loss?

Some people may experience hair loss on keto diet, but it’s usually temporary and due to nutrient imbalances or stress. Make sure to eat a variety of nutritious foods and manage stress levels.

12. Can keto diet worsen thyroid function?

There is no evidence to suggest that keto diet has a negative impact on thyroid function. However, people with thyroid conditions should consult their doctor before starting any diet.

13. Can keto diet cause heart problems?

Some studies suggest that keto diet may increase LDL (“bad”) cholesterol levels in some people, but it can also raise HDL (“good”) cholesterol and lower triglycerides. The long-term effects of keto diet on heart health are still unclear.


All in all, does keto diet work? The answer is a qualified yes – for many people, it can be an effective and sustainable way to lose weight, improve metabolic health, and boost energy levels. However, it’s not a magic bullet, and its effectiveness depends on many individual factors like genetics, compliance, and health goals. If you’re considering keto, talk to your doctor or a registered dietitian to determine if it’s a suitable option for you. Lastly, remember that no diet is perfect, and a balanced and varied approach to nutrition is always the best choice in the long run.


1. Dashti HM, Mathew TC, Khadada M et al. Beneficial effects of ketogenic diet in obese diabetic subjects. Mol Cell Biochem. 2007 Aug; 302(1-2):249-56.

2. Gibson AA, Seimon RV, Lee CM et al. Do ketogenic diets really suppress appetite? A systematic review and meta-analysis. Obes Rev. 2015 Jan; 16(1):64-76.

3. Volek JS, Noakes T, Phinney SD. Rethinking fat as a fuel for endurance exercise. Eur J Sport Sci. 2015 Mar; 15(1):13-20.

4. Hussain TA, Mathew TC, Dashti AA et al. Effect of low-calorie versus low-carbohydrate ketogenic diet in type 2 diabetes. Nutrition. 2012 Oct; 28(10):1016-21.

5. Yancy WS Jr, Foy M, Chalecki AM et al. A low-carbohydrate, ketogenic diet to treat type 2 diabetes. Nutr Metab (Lond). 2005 Dec; 2:34.

6. Paoli A, Bosco G, Camporesi EM et al. Ketosis, ketogenic diet and food intake control: a complex relationship. Front Psychol. 2015 Feb; 6:27.


The information provided in this article is for educational and informational purposes only and is not intended as medical advice. Consult with your doctor or a registered dietitian before making any changes to your diet or exercise regimen. The author and publisher of this article are not liable for any damages or losses arising from any use of this information.

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