Side Effects of Keto Diet

Table of Contents

Apart from being the top trending diet of 2023, there are several Side Effects of Keto Diet. This article aims to explain and examine the Side Effects of Keto Diet.

So you have enthusiastically begun a keto diet plan and are looking forward to its many benefits. Nevertheless, it’s been a couple of days, and you are currently feeling inadequate. You’re tired; you have frustration. You’re quickly annoyed, as well as you’re having a tough time focusing.

Congratulations! You have what is frequently referred to as the keto flu. It’s not actually flu, and it’s not transmittable or hazardous, but it can certainly be very undesirable.

Many people feel one or more of these signs throughout the first week of a keto diet plan, particularly days 3-5. Fortunately, it’s short-lived, and you’ll quickly feel great again. You’ll likely have much more energy than before you began the diet.

Ketogenic low carbs diet. Meat, fish, nuts, oil, cheese, milk and avocado on dark stone background. Top view with copy space. - Side Effects from Keto Diet

Along with weight management, there are a few widely known adverse effects of the keto diet plan, several of which can be undesirable.

Side Effects of Keto Diet

Common side effects of the keto diet include weight loss, constipation, increased cholesterol, and triglyceride levels, amenorrhea or other disruptions to the menstrual cycle, fatigue or brain fog, nausea, “keto flu,” reduced athletic performance, ketoacidosis, weight regain, less muscle mass and decreased metabolism.

The keto diet plan is frequently called a crash diet. Please make no mistake: it is. Unlike other trendy diet plans, the keto diet plan is unique since it pushes the body right into an alternative, all-natural metabolic state called ketosis. When this occurs, you can dependably expect a few adverse side effects, especially those that feature the “keto flu.” Opposite results emerge only when individuals carry out the keto diet plan improperly, commonly by failing to eat well-balanced, nutrient-rich foods as a component of a high-fat, low-carb diet.

Food rich in calcium

Here are a few of the awful adverse effects of the keto diet plan. A lot of which can be prevented with some careful planning.

Here are a couple of points you ought to find out about the ketogenic diet plan before trying it to slim down. Yes, you might drop extra pounds, but you should watch for the following side effects or difficulties.

The keto flu

Some people state that when they start the ketosis process, they feel ill. There can often be vomit, gastrointestinal distress, a great deal of exhaustion, and sleepiness. This is the so-called keto flu. Typically passes after a couple of days.

Exhausted business man falling asleep as soon as he came back home

Josh Axe, a physician of alternative medicine and a scientific nutritional expert, approximates that 25% of individuals who attempt a ketogenic diet experience these symptoms, with exhaustion being one of the most typical. “That takes place because your body runs out of sugar to burn for energy, and it has to begin making use of fat,” he claims. “That change alone is enough to make your body feel tired for a couple of days.”

You might be able to lessen the results of keto flu by consuming lots of water and getting plenty of sleep. Axe, who offers keto-related supplements on his site, advises incorporating all-natural energy sources to battle fatigue, like matcha eco-friendly tea, natural coffee, or adaptogenic herbs.


Sad, upset, unhappy woman holding hands on stomach suffering from abdominal pain - Side Effects from Keto Diet

What’s most likely to occur when you eliminate the natural resources of fiber from your diet? Bowel constipation.

A 2015 research study entailing youngsters on the keto diet regimen revealed that routine irregularity was very common among participants, affecting 65 %.

Most of the wealthiest fiber resources, like beans, fruit, and entire grains, are limited to the ketogenic diet regimen. As a result, ketogenic eaters lose out on the advantages of a fiber-rich diet, such as routine laxation and microbiome support. The microbiome has been implicated in everything, from the immune system to psychological health and wellness.

Still, the keto diet doesn’t need to lead to fiber deficiency: avocados, flaxseed, almonds, pecans, as well as chia seeds, can all offer fiber while still keeping you in ketosis – when eaten in the correct amounts.

Avocado, almonds, hemp seeds, linseeds, olives and oils over white background, top view. Alternative oils concept - Side Effects from Keto Diet

Any diet plan that bans you from eating lots of kinds of fruits, vegetables, and various other foods is bound to leave you at risk of vitamin and mineral shortages, as well as it’s for this reason many physicians only advise going on the keto diet over a short term.

Keto for short-term fat loss

Keto is not an excellent long-lasting diet plan, as it is not a well-balanced diet. A diet devoid of vegetables and fruit will undoubtedly lead to lasting micronutrient deficiencies that can have other repercussions. The keto diet can be utilized for short-term fat loss as long as it is under medical guidance.

Your body begins to shed fat, water, and glycogen on the keto diet plan. Even as this occurs, you lose essential electrolytes, such as sodium, potassium, and magnesium. When you’re running low on these electrolytes, you may experience frustration or extreme tiredness. These losses are most noticeable during the first couple weeks after you enter ketosis. So if you’re going to begin the keto diet, you must get balanced amounts of these electrolytes – and other nutrients. You can do it either through supplements or a thoughtful meal strategy.

Muscle loss

Some studies suggest that the keto diet can lead to lean body mass loss. This includes muscular tissue and healthy protein.

Muscular tissue loss on the ketogenic diet plan is a continuous area of research,” Clark told Everyday Health. “Little studies suggest that people on the ketogenic diet shed muscle also when they continue resistance training. This may be associated with the truth that protein alone is much less reliable for muscle building than healthy protein and carbs together after a workout.

Athletic man running on a treadmill with the doctor monitoring him - Side Effects from Keto Diet

The site sci-fit, which compiled a study of the research on the keto diet regimen, is located:

We generally see more significant lean body mass loss in ketogenic diet groups. Keep in mind that lean body mass contains water, glycogen, and muscular tissue healthy protein, by definition. It is tough to say with certainty that LBM loss implies better “completely dry” muscular tissue healthy protein loss. “Damp” LBM can reoccur swiftly because it includes water and glycogen.”

Regarding getting muscle, it seems healthy protein alone doesn’t do as well as it does when paired with complex carbs. These carbohydrates do not enter the muscle fiber. However, they help accelerate the process by assisting cells to regain glycogen – a vital fuel resource throughout the workout.

Kidney damage

Some people damage their kidneys when they switch over to the kidney diet. This is because they eat excessive meat and don’t consume sufficient water. This can result in a rise in uric acid, which is recognized to cause kidney stones.

Kidneys pain, female person with backache isolated on white background. Woman in lingerie, medical advertising or concept - Side Effects from Keto Diet

” If you’re going to do keto, there’s a far better as well as an even worse way to do it,” signed-up diet professional Kim Yawitz informed Everyday Health and wellness. “Filling your plate with meats, as well as specially processed meats, might increase your risk for kidney stones and also gout pain … High consumption of healthy pet proteins makes your urine more acidic as well as boosts calcium as well as uric acid levels. This combination makes you a lot more prone to kidney stones, while high uric acid can enhance your risk for gout.”

Naturally, a reliable keto diet regimen strategy need not cause damage to the kidneys, in addition to monitoring meat usage, a 2007 research study on kidney stone growth in young individuals on the keto diet plan states that taking dental potassium citrate tablet computers seemed efficient at protecting against kidney rocks.

Lowered athletic efficiency

Some athletes advocate the ketogenic diet plan not merely for weight reduction; however, for enhanced performance in their sporting activity. However, Edward Weiss, Ph.D., associate professor of nourishment and dietetics at Saint Louis University, doesn’t get it. “I listen to bicyclists constantly say that they’re faster as well as much better now that they’re on keto, and also my initial question is, ‘Well, just how much weight did you shed?’” he states.

In a current study in the Journal of Sports Medicine and Physical Conditioning, Weiss and his colleagues discovered that individuals executed even worse on high-intensity biking and running tasks after four days on a ketogenic diet, contrasted to those who’d spent four days on a high-carb diet regimen. Weiss claims that the body remains more acidic when it stays in ketosis, which might limit its capability to do at peak degrees.

” Simply shedding a few extra pounds suffices to offer you a huge advantage on the bike, yet I’m anxious that individuals are associating the benefits of weight management to something details in the ketogenic diet regimen,” Weiss continues. “In reality, the benefits of fat burning can be at the very least partly negated by decreased inefficiency.”


If you have type 1 or 2 diabetes, you should not adhere to the keto diet regimen. Unless you have your medical professional’s authorization and close guidance, claims Kizer. “Ketosis can really be practical for individuals who have hyperglycemia issues, but you have to be conscious of your blood glucose and also examine your glucose degrees numerous times a day,” she states.

Fresh salad, glucose meter with result of sugar level, tape measure and dumbbells for fitness, concept of diabetes, slimming, healthy lifestyles and nutrition

That’s because, for individuals with diabetes mellitus, ketosis can trigger a dangerous condition called Ketoacidosis. This occurs when the body stores up too many ketones – acids produced as a byproduct of shedding fat – and the blood comes to be acidic, which can damage the liver, kidneys, and brain. Left unattended, it can be deadly.

However, Ketoacidosis has also been reported in people without diabetes who comply with low-carb diet plans. Although this is relatively uncommon. Symptoms of Ketoacidosis include a dry mouth, constant peeing, queasiness, foul-smelling breath, and breathing problems; if you experience these while complying with the keto diet regimen, sign in with a doctor right now.

Weight gain back

Since the keto diet is limiting, health and wellness specialists state it’s not ideal for complying with lasting. (Even Axe says it’s perfectly done for 30 to 90 days, followed by a more lasting diet regimen strategy.) The problem with that, claims Kizer, is that most individuals will certainly restore a great deal of the weight they shed as quickly as they return on carbs.

” It’s an issue with any crash diet, yet it seems to be additional usual with ketosis,” states Kizer. “When people inform me they wish to try it since their pals lost weight, I constantly tell them, ‘Simply enjoy, I almost assure that they’ll obtain all of it back.’”.

muffins-and-measuring-tape - Side Effects from Keto Diet

Kizer says these sorts of back-and-forth weight variations can contribute to disordered consumption or worsen an undesirable relationship with food. “I think this diet plan interests individuals that have problems with portion control and also with binge eating,” she states. “And in most cases, what they need is a way of life trainer or a professional counselor to assist them in obtaining to the bottom of those problems.”.

Much less muscular tissue mass reduced metabolic process.

Another repercussion of keto-related weight changes can be losing muscular tissue mass, states Kizer – mainly if you’re eating much more fat than protein. You’ll lose weight, but it may be a lot of muscular tissue. This is because muscle mass burns a lot more calories than fat, which will impact your metabolism.

When an individual goes off the ketogenic diet plan and regains much of their original weight, it’s commonly not in the very exact percentages, says Kizer. Instead of restoring lean muscle mass, you’re most likely to gain back fat. Currently, you’re back to your starting weight. Yet you no longer have the muscle mass to shed the calories you did before. This has lasting effects on your resting metabolic rate and long-lasting weight.

Sign up for the Healthy Living newsletter to get our leading stories supplied to your inbox.

The enhanced threat of heart problems and diabetes.

When done right, the ketogenic diet consists of great deals of veggies and lean resources of protein. In other words, it’s not a reason to consume butter and bacon. However, some individuals might attempt to do just that.

medicine, diabetes, glycemia, health care and people concept - close up of male finger with blood drop and test stripe - Side Effects from Keto Diet

Many health professionals are concerned about people on the keto diet plan. Particularly those who try it without the assistance of a physician or nutritionist. Physicians state that high-fat diet plans like this one may raise cholesterol degrees. Besides, some researches suggest that they increase the danger of diabetes mellitus. Some have even called it a “cardiologist’s problem.”.

Just this week, a 25,000-person research study provided at the European Culture of Cardiology Congress in Munich recommended that individuals on the lowest-carb diet regimens had the highest risk of dying from cancer cells, cardio problems, and all other reasons. Another research study, published this month in the Lancet, found that people who complied with diets that were reduced in carbs and high in pet proteins had a more significant threat of sudden death than those who consumed carbohydrates in moderation. However, low-carb dieters selected plant-based healthy proteins over meat and milk.


What is the “keto flu,” and how can I prevent it?

The “keto flu” refers to the symptoms you may experience when starting the keto diet, like fatigue, headaches, and nausea. To prevent it, stay hydrated and consume electrolytes.

Can the keto diet cause digestive issues, and what can I do about them?

Yes, the high-fat keto diet may cause digestive issues like constipation or diarrhea. You can prevent these by getting sufficient fiber from non-starchy vegetables, nuts, and seeds. Probiotic supplements can also help.

Does the keto diet affect cholesterol levels, and what should I do if I’m concerned?

The keto diet can impact cholesterol levels, and monitoring them is essential. While some see an improvement, others may experience an increase in LDL cholesterol. Consult a doctor and add healthy fats.

Is it possible to experience nutrient deficiencies on the keto diet, and how can I prevent them?

The keto diet can cause nutrient deficiencies due to restrictions on certain food groups. Focus on nutrient-dense foods like leafy greens, nuts, and berries, and consider taking a multivitamin. Work with a healthcare professional.


So, there you have it. These are the significant Side Effects of Keto Diet.

Grilled salmon fish fillet with asparagus and tomato on white craft plate. Top view on white stone table. - Side Effects from Keto Diet

Whether you follow the diet plan, the paleo camp, the keto camp, or the vegan camp, everybody agrees that we wish to have a nutrient-rich diet plan. Great deals of vegetables, natural herbs, seasonings, and plant-based resources of fat and protein.

If you’re refraining from doing that, you’re promoting a bad condition in the body. It is that simple. If you’re simply most likely to eat butter and bacon, you better avoid keto in any way.

Get this Keto Diet Guide to help you Lose Weight & Reboot Your Metabolism!


Keto diet side effects: Symptoms, causes, and risks – Medical News Today

Short-term keto diet side effects include keto flu, which may cause fatigue, nausea, and dizziness, among other symptoms. Keto flu usually resolves in a few days or weeks. In the …

7 Side Effects of the Keto Diet – Health

“Some people report that when they start ketosis, they just feel sick,” said Kristen Kizer, RD, a dietician at SportsTec Clinic in Kingston, Australia. “There can sometimes be vomit,… …

Ketogenic Diet Side Effects: 7 Signs That You’re In Ketosis – Perfect Keto

Ketogenic Diet Side Effects: 7 Signs That You’re In Ketosis Medically reviewed by Dr. Anthony Gustin, DC, MS on October 26, 2020 —Written by Spencer Brooks Written by Spencer Brooks …

11 Keto Side Effects to Know – Possible Keto Diet Dangers – Prevention

“The general timeline is about five to seven days of feeling low energy, i.e., the keto flu,” Keatley says. “In some people, this will manifest itself in general tiredness or …

Low-carb diet: Can it help you lose weight? – Mayo Clinic

A sudden and drastic reduction in carbs can cause temporary side effects, such as: Constipation Headache Muscle cramps Severe carb restriction can cause your body to break fat down into …