Keto diet

The keto diet, also called the ketogenic or protein diet, is a type of diet built around sharply reducing your carbohydrate intake. On this page you will find everything about how to start the keto diet, which foods to eat and how the programmes differ.

16 best keto foods

The keto diet is certainly not boring. Take a look at the best keto foods and meals you can enjoy with a clear conscience.

Starting the keto diet

The keto diet is one way to lose weight, but after a year the difference compared with other diets is small. If you want to learn more about the ketogenic diet, this article is for you.

15 popular keto meals

Take a look at the 15 most popular keto meals you can make at home. Which recipes should you cook on the keto diet?

Ketomix programme

KetoMix is one of the best-known ketogenic diets on the market and includes a daily meal plan with its packages.

Chia Shake programme

Chia Shake offers keto packages, shakes and diet meals. According to the manufacturer, they are meant to replace regular meals.

Ketofit programme

Ketofit sells protein and keto meals and, according to its website, is designed specifically for women. By its own disclaimer, it does not guarantee results for everyone.

Mediterranean diet + benefits

The Mediterranean diet has long been known and has proven positive effects on our health.

How to put together a keto meal plan?

Not sure what to eat on the keto diet for a whole week without getting bored? Take a look at our varied and healthy keto meal plan for the whole week.

7 summer salad ideas

On a protein diet (keto diet), salads are one of the building blocks of a healthy and balanced meal plan.

Lemon water

It sounds trivial, but lemon water can be a pleasant way to start your daily fluid intake in the morning.

Protein meals + health

What are the health benefits of sticking to a protein diet and avoiding sugar, apart from weight loss?

Counting carbohydrates

If you want to succeed and not regain weight after the keto diet, you need to learn how to count the carbohydrates in your food.

How to recognise ketosis?

Ketosis is a state in which, when carbohydrates are scarce, the body produces ketones from fat and uses them as fuel. Ketosis alone does not guarantee weight loss.

How to get enough protein?

Proteins are the basic building blocks of our body. They are important not only for building muscle mass but also for the body to function properly.

Keto diet for vegetarians

On the keto diet, people often eat a lot of meat and animal protein. However, the keto diet can also be meat-free and purely vegetarian.

The content of this page is based on articles by our editorial team and can be a great guide to information about the keto diet and weight loss in general. It features detailed articles, keto meal plans and great keto recipes. Below we compare the KetoMix, Ketofit, Chia Shake and Mix & Slim programmes as well as cooking at home. But do not forget that simply buying a one-month weight-loss programme will not save you. The best keto diet is an informed one. When you have enough information and can work better with your body, you have a better chance of losing weight and keeping it off. You need to learn more about how your body works and how to use your knowledge of how carbohydrates work in the body. That is what this page is for!

What the keto diet is and how it works

The keto diet is a way of eating with a very low amount of carbohydrates, usually under 50 grams a day, and a high proportion of fat. The Harvard T.H. Chan School of Public Health gives a ratio of around 70 to 80% of energy from fat, 10 to 20% from protein and 5 to 10% from carbohydrates. With such a restriction, the body starts using fat instead of glucose, and the liver turns it into ketones. This is called ketosis.

The effect on weight is more modest than adverts promise. A 2013 meta-analysis by Bueno and colleagues in the British Journal of Nutrition found a difference of 0.91 kg after a year or longer compared with low-fat diets. A small difference. Harvard adds that most studies lasted up to 12 weeks and long-term safety is unclear, so approach keto with care, not as the only right path to health, especially if you have a chronic illness or take medication.

Who the keto diet is not suitable for and when to see a doctor

A 2026 review by Dyńka and colleagues in the journal Annals of Medicine distinguishes between rare congenital disorders, where keto must not be followed at all, and situations that require caution. Before you start, talk to a doctor if any of the following points apply to you.

pregnancy or breastfeeding, as well as childhood and adolescence, where there is not enough data
type 1 diabetes or type 2 diabetes treated with medication, as insulin and sulfonylureas can push blood sugar too low and SGLT2 inhibitors increase the risk of ketoacidosis
advanced kidney disease, liver disease, acute pancreatitis or inherited high cholesterol
blood pressure medication, gallstones, having had your gallbladder removed or heart rhythm disorders
being underweight, heavy physical strain, recovering from surgery or older age with several illnesses

At the start, tiredness, headaches, nausea and constipation are common. People call this keto flu, and according to Harvard it can last days to weeks. If repeated vomiting, a pounding heart or unusual weakness are added, we think that is a reason to stop the diet and call a doctor. If you have diabetes, do not wait. In the long term, Harvard mentions the risk of kidney stones, osteoporosis and a lack of fibre, vitamins and minerals.

Keto programmes and cooking at home in a table

On 31 October 2026, four-week packages cost from 3,999 to 4,499 CZK according to the sellers’ websites, but special offers change. We worked out the price per day ourselves, and according to the guides you usually buy vegetables separately from the package. During our research we did not find any independent study of a specific programme.

Programme	Week	4 weeks	Per day over 4 weeks	Phase 1 according to website	What to watch out for
Ketomix	999 CZK	3,999 CZK	143 CZK	5 meals from the package, vegetables up to 10 g carbohydrates, 30 g nuts	free delivery over 1,890 CZK, premium version costs more
Chia Shake	1,219 CZK	4,499 CZK	161 CZK	5 meals a day, 140 meals for 4 weeks	carbohydrates per serving not stated on the page, free delivery from 2 weeks
Mix & Slim	1,299 CZK	4,199 CZK	150 CZK	5 meals from the programme, about 200 g green vegetables	length of phase 1 stated inconsistently on the page, free delivery over 1,500 CZK
Ketofit	1,299 CZK, 36 servings	3,999 CZK, 140 servings	143 CZK	5 protein meals, up to 500 g vegetables	website says it is designed for women, does not guarantee results
Cooking at home	depends on shopping	depends on shopping	depends on shopping	no phases, limit under 50 g carbohydrates a day	you track carbohydrates, variety and vitamins yourself

Home-made keto has no fixed price, it depends on what you buy and where. You will find it calculated in the article how much the keto diet costs. In our view, a package is a helpful start if you do not want to plan, while the home version makes sense if you enjoy cooking and do not mind counting.

Commercial message. The links below are affiliate links and lead to the sellers’ websites. You can find Ketofit without commission at ketofit.cz.

PartnerKetomix, packages for 1 to 10 weeks, cheapest weekly package 999 CZK as of 31 October 2026. View Ketomix prices › PartnerChia Shake, keto packages for 1 to 8 weeks, from 1,219 CZK as of 31 October 2026. View Chia Shake prices › PartnerMix & Slim, keto packages for 1 to 8 weeks, from 1,299 CZK as of 31 October 2026. View Mix & Slim prices ›

Keto diet articles by topic

The overview is ordered from first steps to price. We recommend the first group for beginners, and the one on risks before buying.

Getting started

Five articles for complete beginners, from the basics to permitted fruit.

Keto diet for beginners
16 keto foods
Keto and low carb, what is the difference
Which fruit you can eat
Keto diet for vegetarians

Meal plans and recipes

A weekly plan and recipes with carbohydrates calculated per serving.

Keto meal plan for the whole week
15 keto recipes
Keto bread recipe
Low-carb desserts

Checking ketosis

How to tell you are in ketosis and how to track your carbohydrate intake.

How to recognise ketosis
Keto strips and measuring ketosis
How to count carbohydrates
How to calculate macronutrients

Risks

What can go wrong and what to watch out for in the first weeks.

Negative experiences and risks
Keto flu
7 mistakes on a low-carb diet
Too much protein and its symptoms

Price

How much keto costs and what people who have tried a programme say.

How much the keto diet costs
KetoMix review and experiences
Meal box diets and their types
Nupo diet and experiences