24 Pros and Cons of a Keto Diet

What is a Keto Diet?

The main component of the ketogenic diet is healthy fats. It contains an adequate amount of protein, but there is a lesser amount of carbohydrates. Fats make up to 65% of the total calorie intake in the ketogenic diet. Carbohydrates are as low as 5%. The carbohydrate intake is 20-60g/day.

It is a diet that causes the body to use ketone bodies as the main energy source instead of glucose. The production of ketone bodies is increased, which is called ketosis. The body always stays in a state of ketosis due to the consumption of such a diet.

In a ketogenic diet, carbohydrate intake is limited. High-sugar foods and refined products should be avoided. Only a limited amount of fruit should be consumed. Beans, potatoes, and other high-carbohydrate vegetables are avoided. Processed foods (like salad dressings) and alcohol intake are also limited. Meat, fish, eggs, coconut and avocado oils, herbs, and low-carbohydrate vegetables are part of the approved ketogenic diet. If a person has a sedentary lifestyle, they should keep their carbohydrate intake in check.

Pros and Cons of a Keto Diet

Pros of Keto Diet

1. Metabolic Syndrome and Diabetes Mellitus

The keto diet has been shown to decrease insulin resistance. In the keto diet, low carbohydrate intake lowers glucose concentrations in the blood. Initial studies suggest that the keto diet may be useful in type 2 diabetes mellitus (a disorder of glucose metabolism). However, a diabetic patient should consult a doctor before using a keto diet. The keto diet may also decrease the progression of diabetic nephropathy. Some studies also suggest its use in hypercholesterolemia. It is also helpful in cases of high blood pressure.

2. Weight Loss

The ketogenic diet boasts numerous health benefits owing to its diverse metabolic effects. With high fat intake, fat oxidation increases, particularly when glucose levels are low. Calorie burn primarily drives fat loss, contributing to weight reduction through adherence to the keto diet.

By restricting carbohydrate (glucose) intake, insulin levels in the bloodstream decrease, unlike the spike caused by high carbohydrate consumption. Insulin’s role in inhibiting lipolysis (fat breakdown) and promoting lipogenesis (fat storage) is minimized with the keto diet’s maintenance of low blood glucose levels. Consequently, reduced insulin levels facilitate fat loss, aiding in weight management.

Moreover, the keto diet diminishes food cravings and enhances satiety, facilitating adherence to the recommended daily calorie intake.

3. Seizures

Utilizing the ketogenic diet for seizure control in children has gained prominence, especially considering its early success compared to traditional anticonvulsant medications. Its effectiveness in managing epilepsy across various age groups is increasingly recognized. Dating back to the 1920s, ketogenic diets have been a staple in epilepsy treatment.

This underscores its potential for addressing a broader spectrum of diseases in the future, given its profound impact on brain metabolism and function. Notably, the ketogenic diet exhibits disease-modifying properties, with individuals experiencing sustained seizure control even post-diet cessation. While the precise mechanism remains uncertain, the diet’s potential neuroprotective effects hint at its antiepileptic efficacy.

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4. Neurodegenerative Diseases

Ongoing research is exploring the potential impact of the ketogenic diet on neurodegenerative diseases. While these studies are still in their early phases, conclusive findings have yet to be determined. The underlying mechanisms driving the keto diet’s neuroprotective effects are of particular interest and are currently under investigation.

Evidence suggests that the keto diet may offer benefits for individuals with Parkinson’s disease. By alleviating strain on the mitochondrial complex, a key player in cellular metabolism, the diet presents an alternative metabolic pathway. Clinical studies have shown promise, indicating improvements in Parkinson’s patients following adherence to the keto diet. Additional mechanisms, such as weight loss and modified protein intake, may further enhance treatment outcomes.

In preclinical studies using mouse models, the ketogenic diet has demonstrated potential in mitigating Alzheimer’s disease progression. Although direct improvements in brain function were not observed, the diet showed promise in reducing amyloid protein accumulation and neuron loss. However, human studies are still pending, necessitating further research in this area.

5. Behavior and Cognition

The ketogenic diet offers neuroprotective benefits, enhancing social behavior, cognitive abilities, and memory in individuals. Research indicates that children on the ketogenic diet exhibit heightened alertness and attention. Furthermore, its effects on social behavior suggest an impact on emotional neurological pathways.

6. Chronic Pain

Patients grappling with untreatable diseases frequently endure chronic pain, utilizing a significant portion of health resources for relief. The anti-inflammatory properties of ketogenic diets offer potential in managing chronic pain, warranting further exploration through research in this area.

7. Chronic Kidney Disease

A low-protein ketogenic diet offers significant benefits for individuals with chronic kidney disease, effectively addressing metabolic imbalances associated with the condition. Incorporating the keto diet alongside dialysis enhances management outcomes, delaying the decline in renal function. It’s crucial to include nutritional monitoring as part of the comprehensive management approach for chronic kidney disease.

8. Cancer

The ketogenic diet shows promise in cancer treatment. Research using a mouse model indicates its potential to reduce brain tumor size and growth by maintaining low blood glucose levels. By starving tumor cells of glucose, the diet inhibits their growth, possibly through mechanisms like the Warburg effect. Additionally, it enhances the effectiveness of chemotherapy and radiotherapy while preserving lean body mass and reducing metastasis in animal studies. Further research is needed to explore its full potential in cancer care.

9. Headache

Apart from its anticonvulsant properties, the ketogenic diet could potentially alleviate migraine headaches. Studies indicate that it diminishes inflammation, addressing the root cause of migraine pain.

10. Sleep Disorders

The Atkins diet and the keto diet both emphasize low carbohydrate intake, though they differ in how they approach carbohydrate consumption. While the Atkins diet gradually increases carbs, the keto diet maintains a consistently low intake. Research, including a small case study, suggests that the Atkins diet may improve sleep disorders like narcolepsy. Similarly, the keto diet has been associated with enhanced sleep quality, though the exact mechanism is yet to be fully understood.

11. Psychiatric Disorders

Studies also propose the utilization of the ketogenic diet for diverse psychiatric conditions, yet the exact mechanism remains elusive. Its potential applications include autism and depression management.

12. Gynecological Issues

The ketogenic diet may contribute to managing metabolic syndrome and could offer benefits for individuals with polycystic ovarian syndrome (PCOS). Studies indicate improvements in fertility with the ketogenic diet, independent of weight loss and calorie intake.

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13. Skin Disorders

The ketogenic diet can be beneficial for improving various skin conditions, including acne, as high sugar and carbohydrate diets often worsen acne symptoms. Additionally, the keto diet may play a role in managing psoriasis, a chronic skin disorder characterized by plaques. In a case study, the ketogenic diet, combined with medications, was effective in improving psoriasis symptoms and reducing their severity.

Cons of Keto Diet

Adverse effects from the ketogenic diet are uncommon but crucial to recognize. They are typically divided into early-onset and late-onset effects.

Early-onset effects encompass gastrointestinal disturbances, hypoglycemia, acidosis, dehydration, weakness, and malaise, commonly experienced when starting the diet but usually resolve with time. The keto diet can also lead to a distinctive fruity smell in breath and urine.

Late-onset effects occur with prolonged use of the ketogenic diet and may include kidney stones, dyslipidemia, and a reduced growth rate in children.

1. Keto Flu

When embarking on a ketogenic diet, some individuals may encounter adverse effects like headaches, nausea, and fatigue, commonly known as “Keto flu,” due to the dietary shift and reduced carbohydrate intake. These symptoms typically subside after a few days. Additionally, constipation may occur, which can be managed by increasing water consumption and fiber intake.

During the initial stages of adopting the keto diet, individuals may experience sluggishness as the brain adjusts to using ketone bodies for energy instead of glucose. This transition period can affect cognitive function temporarily until the body fully adapts to the new dietary regimen.

2. Nutrient Deficiencies

The keto diet’s lack of balance, stemming from the absence of certain food items, can potentially lead to nutrient deficiencies. However, with guidance from a dietitian, these deficiencies can be avoided. It’s vital to incorporate a diverse range of foods alongside the high-fat intake characteristic of the keto diet. Ensuring adequate consumption of fruits, legumes, and meat is essential to prevent deficiencies in vitamins and minerals like iron and magnesium. Additionally, maintaining sufficient dietary fiber intake is crucial for overall health.

3. Endurance Competition

A low-carbohydrate diet, when compared to a high-carbohydrate diet, is linked with subpar training adaptations and diminished energy and endurance levels in athletes. Additionally, adopting a low-carbohydrate diet, including the ketogenic diet, may hamper power training outcomes and overall athletic performance. As a result, athletes are encouraged to steer clear of the ketogenic diet to optimize their performance levels.

4. Gut Health

The ketogenic diet typically lacks adequate dietary fiber, which can adversely affect gut health and contribute to issues like constipation. It’s crucial to consult a dietitian to ensure sufficient dietary fiber intake.

5. Skin Conditions

The ketogenic diet could potentially impact the skin negatively, as evidenced by a reported case of prurigo pigmentosa, an itchy skin condition, arising from strict adherence to the diet. However, it’s worth noting that such skin conditions are rare occurrences.

6. Eating Habits

When individuals meticulously monitor their dietary intake, regardless of their body’s requirements, it can lead to psychological distress, including shame and binge eating. Restrictive eating habits may trigger binge episodes, followed by feelings of guilt, perpetuating a cycle of restriction.

7. Dyslipidemia

When someone follows a high-fat ketogenic diet, it can impact their lipid profile negatively. Research suggests that children on a keto diet often exhibit elevated levels of LDL and VLDL (bad cholesterol) and reduced levels of HDL (good cholesterol). However, lipid levels typically return to baseline upon discontinuation of the diet. Experts recommend limiting the duration of the ketogenic diet to two years before returning to a normal-fat diet.

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While some argue against the idea that a keto diet leads to dyslipidemia, citing a 2004 study showing lower LDL and glucose levels, further research is needed to fully understand its effects on lipid levels.

8. Heart Health

On a ketogenic diet, individuals consume high levels of fat and meat, which are typically avoided by those with cardiovascular issues. The saturated fat in the keto diet may elevate LDL levels and potentially increase the risk of heart problems. Conversely, diets rich in plant-based foods have been linked to a reduced risk of cardiovascular issues and are associated with increased longevity.

9. Kidney Stones

The ketogenic diet can lead to acidosis and urine acidification, increasing calcium excretion and the risk of kidney stone formation. About 5% of children following a keto diet may develop kidney stones. To prevent this, it’s recommended to use prophylactic oral potassium citrate.

10. Growth Rate of Children

The ketogenic diet, while effective for some, may not provide a balanced nutritional profile and could slow children’s growth. However, growth typically accelerates once the diet is stopped. Regular monitoring is essential for children following the keto diet.

11. Skeletal Fractures

The ketogenic diet may lower bone density, raising the risk of skeletal fractures. However, the effectiveness of calcium supplementation in mitigating this risk is yet to be established.


Both the keto diet and the less restrictive Atkins diet offer potential benefits for neurological and gynecological disorders, but adherence is key to realizing these effects. However, there are also potential drawbacks to consider. Individuals following a keto diet should be closely supervised by a team consisting of a dietitian and a physician.


  1. Freeman, J. M., Kossoff, E. H. & Hartman, A. L. The ketogenic diet: One decade later. Pediatrics vol. 119 535–543 (2007).
  2. Suzanna Maria Zick, N. M. D. S. M. D. I. A. M. Pros and Cons of Dietary Strategies Popular Among Cancer Patients. (2018).
  3. The Ketogenic Diet and Skin | Dermveda.
  4. The Pros and Cons of the Keto Diet | HealthConnect.
  5. The Pros and Cons of The Ketogenic Diet | Cellucor.
  6. Farrés, J. et al. Revealing the molecular relationship between type 2 diabetes and the metabolic changes induced by a very-low-carbohydrate low-fat ketogenic diet. Nutr. Metab. 7, 88 (2010).
  7. Liu, D. et al. Low-protein diet supplemented with ketoacids delays the progression of diabetic nephropathy by inhibiting oxidative stress in the KKAy mice model. Br. J. Nutr. 119, 22–29 (2018).
  8. Ketogenic vs. Paleo Diet: What’s the Difference.
  9. Hallböök, T., Ji, S., Maudsley, S. & Martin, B. The effects of the ketogenic diet on behavior and cognition. Epilepsy Res. 100, 304–309 (2012).
  10. Masino, S. A. & Ruskin, D. N. Ketogenic diets and pain. in Journal of Child Neurology vol. 28 993–1001 (NIH Public Access, 2013).
  11. Garneata, L. & Mircescu, G. Effect of Low-Protein Diet Supplemented With Keto Acids on Progression of Chronic Kidney Disease. Journal of Renal Nutrition vol. 23 210–213 (2013).
  12. Less carbs, more fat: ketogenic diet makes migraine patients’ headaches disappear | HuffPost.
  13. The Pros And Cons Of The Keto Diet, According To Doctors And Nutritionists | HuffPost Life.
  14. Kulak, D. & Polotsky, A. J. Should the ketogenic diet be considered for enhancing fertility? Maturitas vol. 74 10–13 (2013).
  15. The Pros and Cons of a Keto Diet – Crisp Regional Hospital.
  16. Zinn, C., Wood, M., Williden, M., Chatterton, S. & Maunder, E. Ketogenic diet benefits body composition and well-being but not performance in a pilot case study of New Zealand endurance athletes. J. Int. Soc. Sports Nutr. 14, 22 (2017).
  17. Pros and Cons of the Ketogenic Diet | Northwestern Medicine.
  18. O’Neill, B. & Raggi, P. The ketogenic diet: Pros and cons. Atherosclerosis vol. 292 119–126 (2020).
  19. Choi, J. N. et al. Renal stone associated with the ketogenic diet in a 5-year old girl with intractable epilepsy. Yonsei Med. J. 51, 457–459 (2010).

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