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Is ketogenic diet good or bad?

Published : Sep 11, 2019 6 mins read Updated On : Mar 06, 2024

A ketogenic diet is a diet that causes the body to release ketones into the bloodstream. Most cells prefer to use blood sugar, which comes from carbohydrates, as the body’s main source of energy. In the absence of circulating blood sugar from food, we start breaking down stored fat into molecules called ketone bodies (the process is called ketosis). Once you reach ketosis, most cells will use ketone bodies to generate energy until we start eating carbohydrates again. The shift, from using circulating glucose to breaking down stored fat as a source of energy, usually happens over two to four days of eating fewer than 20 to 50 grams of carbohydrates per day. Keep in mind that this is a highly individualized process, and some people need a more restricted diet to start producing enough ketones.

Because it lacks carbohydrates, a ketogenic diet is rich in proteins and fats. It typically includes plenty of meats, eggs, processed meats, sausages, cheeses, fish, nuts, butter, oils, seeds, and fibrous vegetables, etc. Because it is so restrictive, it is really hard to follow over the long run.. One of the main criticisms of this diet is that many people tend to eat too much protein and poor-quality fats from processed foods, with very few fruits and vegetables. Patients with kidney disease need to be cautious because this diet could worsen their condition. Additionally, some patients may feel a little tired in the beginning, while some may have bad breath, nausea, vomiting, constipation, and sleep problems.

Is a ketogenic diet healthy?

Evidence shows that a ketogenic diet reduces seizures in children, sometimes as effectively as medication. Because of these neuroprotective effects, questions have been raised about the possible benefits for other brain disorders such as Parkinson’s, Alzheimer’s, multiple sclerosis, sleep disorders, autism, and even brain cancer. However, there are no human studies to support recommending ketosis to treat these conditions.

Weight loss is the primary reason my patients use the ketogenic diet. Previous research shows good evidence of a faster weight loss when patients go on a ketogenic or very low carbohydrate diet compared to participants on a more traditional low-fat diet, or even a Mediterranean diet. However, that difference in weight loss seems to disappear over time.

This diet also has been shown to improve blood sugar control for patients with type 2 diabetes, at least in the short term. There is even more controversy when we consider the effect on cholesterol levels. A few studies show some patients have increase in cholesterol levels in the beginning, only to see cholesterol fall a few months later. However, there is no long-term research analyzing its effects over time on diabetes and high cholesterol.

Different Types of Ketogenic Diets

There are several versions of the ketogenic diet, including:

  • Standard ketogenic diet (SKD): This is a very low-carb, moderate-protein and high-fat diet. It typically contains 75% fat, 20% protein and only 5% carbs.
  • Cyclical ketogenic diet (CKD): This diet involves periods of higher-carb refeeds, such as 5 ketogenic days followed by 2 high-carb days.
  • Targeted ketogenic diet (TKD): This diet allows you to add carbs around workouts.
  • High-protein ketogenic diet: This is similar to a standard ketogenic diet, but includes more protein. The ratio is often 60% fat, 35% protein and 5% carbs.

However, only the standard and high-protein ketogenic diets have been studied extensively. Cyclical or targeted ketogenic diets are more advanced methods and primarily used by bodybuilders or athletes. The ketogenic diet actually originated as a tool for treating neurological diseases such as epilepsy. Studies have now shown that the diet can have benefits for a wide variety of different health conditions:

  • Heart disease: The ketogenic diet can improve risk factors like body fat, HDL cholesterol levels, blood pressure and blood sugar.
  • Cancer: The diet is currently being used to treat several types of cancer and slow tumor growth.
  • Alzheimer's disease: The keto diet may reduce symptoms of Alzheimer's disease and slow its progression.
  • Epilepsy: Research has shown that the ketogenic diet can cause massive reductions in seizures in epileptic children.
  • Parkinson's disease: One study found that the diet helped improve symptoms of Parkinson's disease.
  • Polycystic ovary syndrome: The ketogenic diet can help reduce insulin levels, which may play a key role in polycystic ovary syndrome.
  • Brain injuries: One animal study found that the diet can reduce concussions and aid recovery after brain injury.
  • Acne: Lower insulin levels and eating less sugar or processed foods may help improve acne.

Foods to Avoid:

Any food that is high in carbs should be limited.

Here is a list of foods that need to be reduced or eliminated on a ketogenic diet:

  • Sugary foods: Soda, fruit juice, smoothies, cake, ice cream, candy, etc.
  • Grains or starches: Wheat-based products, rice, pasta, cereal, etc.
  • Fruit: All fruit, except small portions of berries like strawberries.
  • Beans or legumes: Peas, kidney beans, lentils, chickpeas, etc.
  • Root vegetables and tubers: Potatoes, sweet potatoes, carrots, parsnips, etc.
  • Low-fat or diet products: These are highly processed and often high in carbs.
  • Some condiments or sauces: These often contain sugar and unhealthy fat.
  • Unhealthy fats: Limit your intake of processed vegetable oils, mayonnaise, etc.
  • Alcohol: Due to their carb content, many alcoholic beverages can throw you out of ketosis.
  • Sugar-free diet foods: These are often high in sugar alcohols, which can affect ketone levels in some cases. These foods also tend to be highly processed.

Key takeaways from a ketogenic diet review?

A ketogenic diet could be an interesting alternative to treat certain conditions, and may accelerate weight loss. But it is hard to follow and it can be heavy on red meat and other fatty, processed, and salty foods that are notoriously unhealthy. We also do not know much about its long-term effects, probably because it’s so hard to stick with that people can’t eat this way for a long time. It is also important to remember that “yo-yo diets” that lead to rapid weight loss fluctuation are associated with increased mortality. Instead of engaging in the next popular diet that would last only a few weeks to months (for most people that includes a ketogenic diet), try to embrace change that is sustainable over the long term. A balanced, unprocessed diet, rich in very colorful fruits and vegetables, lean meats, fish, whole grains, nuts, seeds, olive oil, and lots of water seems to have the best evidence for a long, healthier, vibrant life. The ketogenic diet (or keto diet, for short) is a low-carb, high-fat diet that offers many health benefits. In fact, over 20 studies show that this type of diet can help you lose weight and improve your health. Ketogenic diets may even have benefits against diabetes, cancer, epilepsy and Alzheimer's disease.

Supplements that can be added in the Keto diet are:

Omega 3 fish oil supplements

Docosahexaenoic acid (DHA) and Eicosapentaenoic acid (EPA) are important omega-3 fatty acids which contribute to positive performance and support maintenance of healthy life. DHA is crucial to normal brain functions and brain efficiency, as it works on cellular level which helps one to learn, think, and remember with greater intellectual and positive emotional stability. EPA helps maintain healthy circulation and heart function. It also helps to manage joint discomfort, fatigue and maintain joint health. Omega 3 fatty acid supplements in india are crucial for athletes as they help reduce inflammation, increase oxygen delivery and allow maximal amount of oxygen-rich blood to reach our working muscle cells. Certainly, the role omega-3 fatty acids plays in the human body is really crucial.
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Is ketogenic diet good or bad?

author
Sayali Naik
Fast&Up Nutrition Consultant

Sayali works with a tons of people and players across the globe and across the sports disciplines, from grassroot to professional Cricketers, Football players, Badminton. Sayali is extremely passio... Read More

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