Keto Diet Advantages and Disadvantages

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Medically Reviewed by Dr. Aman Priya Khanna
Written by Charu Shrivastava, last updated on 15 December 2023
Keto Diet Advantages and Disadvantages

Did you know the keto diet has been around for over 100 years but has only become popular recently? The keto diet can help you lose weight quickly, but it's important to understand the keto diet advantages and disadvantages before starting it.

In this blog, we'll discuss the benefits and side effects of a keto diet and explore both sides. So, read on!

About Keto Diet

The ketogenic diet involves reducing the consumption of carbohydrates to less than 20-50 grams per day while increasing the intake of healthy fats. It causes the body's metabolism to enter a state known as ketosis. 

During ketosis, the body becomes incredibly efficient at burning fat for energy. It also turns fat into ketones in the liver, which can supply energy to the brain. Getting into and staying in ketosis is an important component of the keto diet.

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Basic Rules of Keto Diet

The ketogenic (keto) diet is a high-fat, low-carbohydrate eating plan. To follow the keto diet correctly, you must follow a few basic rules and principles:

  1. Carbohydrate Restriction: Keep your daily carbohydrate consumption to 20-50 grams of net carbs.

    Net carbohydrates are estimated by subtracting fibre and certain sugar alcohols from the total carbs in the food.

  2. High Fat Intake: Fats account for a considerable amount of your daily calorie intake.

    Healthy fats should account for approximately 70-75% of your entire caloric intake.

    Avocados, almonds, seeds, olive oil, coconut oil, and fatty fish are good healthy fats sources.

  3. Moderate Protein Intake: Protein is an important component of the keto diet, but it should not be consumed in excess.

    Protein should account for 20-25% of your daily caloric intake.

    Meat, poultry, fish, and eggs are good protein sources.

  4. Stay Hydrated: To stay hydrated, drink lots of water throughout the day, as the keto diet can have a diuretic impact. T

    his results in increased water loss. Electrolyte imbalances are possible, so include salt, potassium, and magnesium-rich foods or supplements as needed.

  5. Low-Carb Veggies: Choose low-carb veggies over starchy vegetables. These provide important vitamins, minerals, and fibre while limiting carbohydrate consumption.

    Here are some examples of low-carb veggies:

    1. Leafy greens

    2. Broccoli

    3. Cauliflower

    4. Zucchini 

  6. Sugar and Grains: Avoid all types of sugar, including table sugar, honey, and high-fructose corn syrup.

    Also, avoid grains such as wheat, rice, and oats, which are heavy in carbohydrates.

  7. Read Food Labels: Check food labels carefully to find hidden carbohydrates and extra sugars in processed meals.

    Carbohydrate intake can be increased by ingredients such as maltodextrin, corn syrup, and specific sugar alcohols.

  8. Plan Your Meals and Track Your Macros: Meal planning is essential on the keto diet to maintain proper macronutrient balance. Prepare meals heavy in healthy fats, moderate in protein, and low in carbohydrates.

    Many people use apps or meal diaries to keep track of their daily macronutrient intake. This ensures they stay within their carbohydrate, fat, and protein target ranges.

  9. Monitor Ketosis: This can be tested using urine strips or blood ketone metres. It assists you in determining whether or not you are in a state of ketosis.

  10. Consider Supplements: To avoid deficits in electrolytes such as salt, potassium, and magnesium, some people may need to take supplements.

Advantages of Keto Diet

The ketogenic diet gained prominence due to its reported health advantages and weight loss effects. Listed below are the major health benefits associated with the keto diet. 

  1. Weight Loss and Maintenance: A primary benefit of the ketogenic diet is its ability to help achieve rapid weight loss.

    Restricting carbohydrates enough to be in a state of ketosis leads to a significant reduction in body fat and an increase or retention of muscle mass.

  2. Blood Glucose Control: A ketogenic diet lowers and stabilises blood sugar levels. Carbohydrate is the nutrient (macronutrient) that raises blood sugar the most.

    Because ketogenic diets are very low in carbohydrates, they eliminate the larger rises in blood sugar.

  3. Insulin Sensitivity Restoration: A keto diet eliminates the root cause of insulin resistance, which is high levels of insulin in the body.

    This diet helps promote sustained periods of low insulin, as low carbohydrate levels mean lower insulin levels.

  4. Improved Cholesterol Levels: Ketogenic diets usually result in improvements in cholesterol levels.

    It is usual for LDL cholesterol levels to go down and HDL cholesterol levels to go up, which is healthy.

  5. Appetite Suppression: Due to the high-fat content of the keto diet, it can help suppress hunger and enhance fullness. This makes it simpler to limit calorie intake.

    The keto diet is especially beneficial for people who struggle with overeating or food cravings.

  6. Enhanced Mental Focus: The keto diet is beneficial for people suffering from Depression, Alzheimer’s disease, and Parkinson’s disease. According to a neuroscience study done in 2018, it helps in balancing the neurotransmitters and also reduces anxiety.

    Ketones, which are byproducts of fat metabolism, provide a consistent energy source for the brain under glucose-deficit conditions. 

  7. Health Benefits for Specific People: The keto diet helps reduce seizures in paediatric patients with epilepsy.

    Endurance athletes and bodybuilders also use it to scrape fat in short time frames.

Disadvantages of the Keto Diet

Like any nutritional regimen, the keto diet also comes with disadvantages.

It’s important to be informed since this can help you know how well it will fit into your diet. Here's an overview:

1. Effects on the Body: The keto diet, while effective for weight loss, can have notable effects on the body:

  1. Deficiencies in Nutrients: Since the keto diet is low in carbohydrates, it may not provide all the nutrients.

    Prolonged diet adherence without adequate preparation might result in fibre, vitamin, and mineral deficits.

    To eliminate this issue, it’s important to do thorough meal planning that includes all nutrients. 

  2. Keto Flu: As the body adjusts to ketosis, some people experience symptoms such as fatigue, headaches, nausea, and irritability, referred to as the "keto flu."

    These symptoms, while temporary, can be uncomfortable. Let your body gradually adapt to the new diet. 

  3. Potential Increase in Bad Cholesterol: The increased consumption of saturated fats might increase LDL cholesterol levels (the "bad" cholesterol).

    Thus, it is important to keep track of your cholesterol levels.

  4. Constipation: Some people may have constipation due to the keto diet's low fibre consumption.

    It's important to prioritise keto-friendly fibre sources like leafy greens and low-carb veggies. 

  5. Increased Risk of Kidney Stones: One of the major disadvantages of the keto diet is an increased risk of kidney stones.

    This risk is mostly due to the diet's high animal protein content and the possibility of dehydration.

    This can result in the production of kidney stones. To reduce risk, remain hydrated, limit protein intake, and talk with a doctor.

  6. Dehydration and electrolyte imbalance: Although uncommon, diabetic ketoacidosis (a severe disease characterised by extremely high levels of ketones and blood sugar) can occur in patients with type 1 diabetes.

    This can be possible if their insulin is not carefully managed on a keto diet. Ketoacidosis can lead to dehydration and electrolyte imbalance.

  7. Leg Cramps and Hyponatremia: Leg cramps are a common side effect of the keto diet. This can happen for a variety of reasons, including electrolyte imbalance.

    The diuretic effect of the diet can result in increased sodium, potassium, and magnesium excretion.

    Muscle cramps might be exacerbated by low sodium levels (hyponatremia). Anyone following the keto diet needs to get enough electrolytes and stay hydrated.

  8. Bad Breath: Many people who follow the keto diet report having foul breath, commonly described as "fruity" or "metallic."

    This is a typical side effect caused by the emission of acetone, a form of ketone, in the breath.

    This problem can be mitigated by practising good dental hygiene and staying hydrated.

  9. Loss of Muscle Mass: While the keto diet can result in significant weight loss, some of that weight loss may be due to muscle tissue loss.

    The diet's concentration on high-fat, low-carb foods can often lead to a lack of protein intake, which is necessary for muscle maintenance. You must include lean protein sources in your diet to prevent muscle loss.

2. Affects Lifestyle: The impact of keto diet extends beyond nutrition, affecting various aspects of daily life:

  1. Limited Food Options: Due to the restrictive nature of the keto diet, meal planning and dining out can be difficult.

    Many conventional foods, such as bread, pasta, and high-carb snacks, are prohibited, perhaps leading to mealtime monotony.

    It’s important to experiment with new food options without sacrificing health. 

  2. Weight Regain: The long-term sustainability of the keto diet can be difficult for many people.

    When carbohydrates are reintroduced, there is a danger of regaining lost weight.

    Some people may also find the diet difficult to maintain over time. Consistency can be maintained if people see the keto diet as an enjoyable option rather than a strict one. 

  3. Social and Lifestyle Challenges: When following the keto diet, social situations, holidays, and dining out can become more challenging.

    This could compromise one's social life and general lifestyle.

  4. Food Obsession: The strict requirements of the keto diet, particularly the carbohydrate restriction, can lead to an unhealthy obsession with eating.

    This could include continually tracking macronutrients and having anxiety over eating choices. Food obsession can lead to unhealthy eating practices in some people.

The long-term effects of a keto diet have not been well-documented.

Thus, it is unclear what potential keto diet disadvantages or advantages may occur with continued adherence.

Takeaway

There are several keto diet advantages and disadvantages. The major upsides include weight loss and appetite suppression. However, there are also keto diet disadvantages like nutrient deficiencies and limited food choices. 

Before you begin the keto diet, talk to a doctor about whether it is a good choice for you. The experts at HexaHealth can advise you on what weight loss strategy will benefit your body and lifestyle. So, book your consultation today!

Suggested Reads:

  1. Vegetarian Keto Diet Plan
  2. Indian Keto Diet Plan

Frequently Asked Questions

What are the benefits of a keto diet?

Here are the benefits of a keto diet:

  1. Weight loss and maintenance

  2. Improved blood glucose control

  3. Appetite suppression

  4. Enhanced mental focus

Are there any disadvantages to following a keto diet?

Here are some disadvantages of following a keto diet:

  1. Nutrient deficiencies

  2. Keto flu during the transition

  3. Limited food choices

  4. Potential increase in LDL cholesterol

Are there any side effects of the keto diet?

Yes, there can be side effects associated with the keto diet:

  1. Keto flu (initial symptoms)

  2. Increased cholesterol levels

  3. Nutrient deficiencies

  4. Gastrointestinal issues

Are there any risks associated with the keto diet?

Here are the risks associated with the keto diet:

  1. Nutrient deficiencies

  2. Elevated LDL cholesterol levels

  3. Gastrointestinal issues

  4. Kidney stones

Is keto a good diet plan?

The keto diet's usefulness as a good diet plan is determined by individual goals and health factors.

It can help with weight loss and some health concerns, but it might not suit everyone.

What are the basic rules for keto?

Here are the basic rules for the ketogenic (keto) diet:

  1. Restrict daily carbohydrate intake to 20-50 grams of net carbs

  2. Consume about 70-75% of daily calories from healthy fats

  3. Limit protein intake to approximately 20-25% of daily calories

  4. Stay hydrated and monitor electrolyte balance

Is keto good for weight loss?

Yes, because of its potential to induce ketosis and stimulate fat burning, the ketogenic (keto) diet can be useful for weight loss in the short run.

However, its long-term viability and individual outcomes may differ.

What are the top 10 keto foods?

Here are the top 10 keto foods:

  1. Avocado

  2. Eggs

  3. Fatty Fish (e.g., salmon, mackerel)

  4. Nuts and Seeds (e.g., almonds, chia seeds)

  5. Low-carb vegetables (e.g., broccoli, spinach)

  6. Cheese (e.g., cheddar, cream cheese)

  7. Meat (e.g., beef, chicken, bacon)

  8. Dark chocolate

  9. Coconut oil

  10. Berries

Can you eat rice on keto?

Traditional rice is generally not suggested on the keto diet due to its high carbohydrate content.

Low-carb alternatives, such as cauliflower rice, can be used in keto-friendly recipes.

Can you drink milk on keto?

Due to its increased carbohydrate content, regular cow's milk should be avoided on a rigorous keto diet.

However, unsweetened almond milk, coconut milk, or other low-carb milk options are lower in carbohydrates.

How much weight can I lose in 1 month on keto?

It is common to lose 4-10 pounds (2-4.5 kgs) or more in the first month, with some people seeing larger early drops due to water weight loss.

After this initial time, sustainable weight reduction normally ranges from 1-2 pounds (0.5-1 kg) per week.

Will keto burn belly fat?

By encouraging the use of fat for energy, keto can help burn general belly fat.

However, spot reduction (removing fat from specific places such as the abdomen) is not guaranteed, and results may vary from person to person.

What fruit is good for keto?

Berries like strawberries, raspberries, and blackberries are generally suitable keto fruit selections.

They are low in carbohydrates compared to other fruits and high in fibre and antioxidants.

How do I start a keto lifestyle?

Here's a step-by-step guide to starting a keto lifestyle:

  1. Consult with a healthcare professional

  2. Calculate your daily macronutrient goals

  3. Plan keto-friendly meals and snacks

  4. Start tracking your daily food intake

How much protein for keto?

Protein should be consumed in moderation on a ketogenic diet. This is normally 20-25% of your regular calorie intake.

Is the keto diet safe for diabetics?

For people with type 2 diabetes, the ketogenic diet can bring positive changes like better blood sugar control, lower cholesterol levels, and weight loss.

However, it should be used with caution and under medical supervision. 

Does keto raise blood sugar?

In most situations, the ketogenic diet lowers blood sugar levels, particularly in people with type 2 diabetes.

The keto diet can improve insulin sensitivity and help stabilise blood sugar by limiting carbohydrate intake.

Is keto good for fatty liver?

Keto can help with fatty liver disease since it increases weight loss and lowers carbohydrate intake.

This can enhance insulin sensitivity and minimise fat accumulation in the liver. 

Is keto good for cholesterol?

The keto diet can help lower total cholesterol and LDL (bad) cholesterol levels. Furthermore, it can raise HDL (good) cholesterol levels.

Can keto lower triglycerides?

Yes, the keto diet has been shown to reduce triglyceride levels.

The keto diet can improve triglyceride levels by reducing carbohydrate intake and encouraging the consumption of healthy fats.

Can keto cause kidney stones?

Yes, the keto diet may raise the risk of kidney stones in some people.

This is because the diet might promote dehydration and increased calcium excretion in the urine.

Is keto good for heart failure?

The keto diet's effect on heart failure is unknown and may not be appropriate for everyone with this condition.

High-fat diets might potentially harm heart health by raising cholesterol levels.

How do I protect my kidneys on a keto diet?

Stay hydrated to prevent kidney stones and maintain kidney function when on a keto diet to safeguard your kidneys.

Monitor your protein intake to prevent putting too much strain on your kidneys.

References

All the articles on HexaHealth are supported by verified medically-recognized sources such as; peer-reviewed academic research papers, research institutions, and medical journals. Our medical reviewers also check references of the articles to prioritize accuracy and relevance. Refer to our detailed editorial policy for more information.


  1. Mawer R. The ketogenic diet: A detailed beginner’s guide to keto [Internet]. Healthline. 2020.link
  2. RD KS. What To Know Before You Go Keto [Internet]. Food Insight. 2023.link
  3. Pros and cons of the ketogenic diet [Internet]. Northwestern Medicine. 2019.link
  4. Batch JT, Lamsal SP, Adkins M, Sultan S, Ramirez MN. Advantages and Disadvantages of the Ketogenic Diet: A Review Article. Cureus [Internet]. 2020 Aug 10;12(8).link
  5. Marshall B. The Pros and Cons of a Keto Diet [Internet]. Crisp Regional Hospital. 2018.link
  6. Cleveland Clinic. Ketogenic Diet For Epilepsy / Seizures [Internet]. Cleveland Clinic. 2020.link
  7. CDC. Diabetic Ketoacidosis [Internet]. Centers for Disease Control and Prevention. 2021.link

Updated on : 15 December 2023

Reviewer

Dr. Aman Priya Khanna

Dr. Aman Priya Khanna

MBBS, DNB General Surgery, Fellowship in Minimal Access Surgery, FIAGES

12 Years Experience

Dr Aman Priya Khanna is a well-known General Surgeon, Proctologist and Bariatric Surgeon currently associated with HealthFort Clinic, Health First Multispecialty Clinic in Delhi. He has 12 years of experience in General Surgery and worke...View More

Author

Charu Shrivastava

Charu Shrivastava

BSc. Biotechnology I MDU and MSc in Medical Biochemistry (HIMSR, Jamia Hamdard)

2 Years Experience

Skilled in SEO and passionate about creating informative and engaging medical content. Her proofreading and content writing for medical websites is impressive. She creates informative and engaging content that educ...View More

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