Keto Rules & Basics: A Simple Guide for Beginners (2025)

Interested in trying the keto diet but don’t know where to start? We’ve created a simple and approachable beginner’s guide to the keto diet.

The body can run on two energy sources: glucose (which comes from carbs) or fat. The keto diet eliminates glucose so that the body is running on and burning fat. The metabolic state in which the body is running on fat as opposed to glucose is called ketosis.

Ketosis is when the body breaks down fatty acids to produce ketones in the liver. Ketones can supply energy to both the body and the brain. People use the keto diet to lose weight and improve overall health. Research shows that the keto diet has been known to help improve health conditions like Type 2 diabetes and to lower blood pressure. Whether your goal is to improve a specific health condition or to gain specific health benefits such as weight loss, there are many successes you can take away from the keto diet when executed correctly.

The keto diet is a low carb, high-fat diet. On the keto diet your carb intake will be limited and you will fill up on fats like meat, fish, eggs, nuts, and healthy oils. Remember to always talk to your doctor before starting a new diet.

Keep reading to see the basic rules of the Keto Diet.

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Keto Rules

1. Cut out the carbs.

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Consume under 25 net carbs per day (total carbs minus fiber). This is going to equate to 5% of your daily food intake. Avoid any type of food that is high in carbs. This includes any sort of bean or grain as well as the more obvious starchy foods like bread and pasta. Keep reading to find some of our go-to bread and pasta alternatives.

2. Eat high quality protein.

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Keep your protein intake to 25% of your daily calories. High amounts of protein can be converted into glucose. Some examples of protein sources include seafood, meat, poultry, eggs, yogurt, and cottage cheese.

3. Go heavy on the fats.

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Your main source of fuel should be fats. This is going to equate to 75% of your daily food intake. Some examples of fats to incorporate into your diet are butter, peanut butter, nuts, seeds, MCT oil, cheese, olives, full fat mayo, olive oil, coconut oil, vegetable oil, avocado oil, ghee, heavy cream, and avocado. Because of the high fat content of this diet, it generally isn't necessary to count your calories. The increase in fat is going to decrease your hunger and make you fuller for longer periods of time.

4. Hydrate, hydrate, hydrate.

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When you first reach ketosis it is not uncommon to experience negative side effects also known as the keto flu. These side effects can range from bad breath, to nausea, to fatigue, brain fog, and even constipation. Combat the keto flu by drinking plenty of water and avoiding intense exercise.

5. Stick to simple beverages.

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Avoid Sugary drinks like fruit juice. Stick to sugar-free coffee, unsweetened tea, nut milks, and if you really want to play it safe, water is your friend. If you are craving sugary drinks, look for sugar alcohols like stevia that satisfy your sweet tooth while still allowing you to stick to your diet.

6. Avoid starchy vegetables.

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When it comes to vegetables, avoid the starchy kinds like corn, potatoes, sweet potatoes, green peas, beets, butternut squash, and carrots. Instead reach for non-starchy vegetables. Non-starchy vegetables contain less sugar and more fiber, which will help you get to ketosis faster. Some examples of non-starchy, low-carb vegetables include arugula, black olives, purple cabbage, asparagus, brussel sprouts, celery, and red peppers.

7. Avoid starchy fruits.

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When people think about fruit, their mind doesn't necessarily jump to carbs. But make no mistake, carbs from fruit can definitely sneak up on you while trying to maintain ketosis. Apply the same logic to fruit as we just did to vegetables to limit your carbohydrate intake. Avoid high-carb fruits. Some high-carb fruits to avoid include bananas, apples, grapes, mangoes, and raisins. Instead, opt for low-carb options like watermelon, cantaloupe, strawberries, raspberries, and blackberries. For a detailed list of low carb fruit and vegetable options, check out our keto friendlyguide.

8. Keep your food consumption to an 8 hour window.

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Incorporate intermittent fasting aka limiting your food consumption to an 8 hour window. This will allow you to get to ketosis faster. According to Healthline it typically takes around 2-4 days to reach ketosis. However, for some people it can take more than a week. Intermittent fasting will help with any potential delays.

9. Check your ketone levels to make sure you’re in ketosis.

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Who wants to load up on fat without being sure that they have actually reached ketosis? When in doubt, purchase Keto Test Strips. This will allow you to know within seconds if there are ketones in your bloodstream.

10. There are keto-friendly alternatives for almost all types of foods. Don’t feel like you have to restrict yourself!

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Just because you’re on the keto diet doesn't mean that you can’t make traditionally carb heavy items like bread, pasta, and pancakes with alternative ingredients that allow you to stay within your macros. Check out some of our favorite recipes below:

Bottom Line

If you are looking for an efficient way to lose weight and burn fat, the keto diet is a great option. Rather than thinking about it as a scary and prohibiting diet, remember that you can actually eat a lot of great things and that it is truly easier to follow than you might think. Incorporate your favorite foods and have fun with it! If done correctly, you will be sure to hit your weight loss goals. And don’t forget, it’s not recommended to do this diet over the long term, 6 months max.

Headed to the grocery store and don’t know where to start? Check out our complete keto grocery list to simplify your shopping experience!

Lastly, if you’re going keto, we can assume that you’re going to need delicious, yet easy and portable snacks. Don’t forget about our absolutely fantastic sugar-free keto beef jerky. Happy Chomping!

Keto Rules & Basics: A Simple Guide for Beginners (2025)

FAQs

Keto Rules & Basics: A Simple Guide for Beginners? ›

Ketogenic diets vary but will consist of about 70–75% fat, 15–20% protein, and 5–10% of carbs per day. Focus on high fat, low carb foods like eggs, meats, dairy, and low carb vegetables, as well as sugar-free beverages. Be sure to limit highly processed foods and trans fats.

What are the basic rules of the keto diet? ›

Ketogenic diets vary but will consist of about 70–75% fat, 15–20% protein, and 5–10% of carbs per day. Focus on high fat, low carb foods like eggs, meats, dairy, and low carb vegetables, as well as sugar-free beverages. Be sure to limit highly processed foods and trans fats.

What is the simplest way to understand keto? ›

The keto diet is typically rich in foods like butter, cheese, eggs, meat, nuts, oils, seafood, and seeds. It does not allow much, if any, room for fruits, vegetables, grains, potatoes, sweets, or other carbohydrate-rich foods.

What are the key rules for the keto diet? ›

Simply put: carbs must be avoided if you want to stay in ketosis. Generally, you want to stay under 25 grams of net carbs (total carbs minus fiber) per day. You also want to watch your protein intake. Protein is not the enemy, as with carbs.

What is the first thing you do on keto diet? ›

Starting a ketogenic diet is pretty straightforward. You simply have to focus on curbing your carbohydrate intake and increasing your fat and protein content. The lower your carbohydrate consumption will be, the easier it will be for you to achieve your intended results.

What food is not allowed in keto? ›

By staying away from grains, sugary foods, high-carb fruits, and starchy vegetables, you set yourself up for a smoother transition into ketosis. Additionally, steer clear of processed foods, alcohol, and condiments that may contain hidden carbs.

How many eggs a day on a keto diet? ›

It's totally fine and safe to eat up to 6 eggs a day while on the keto diet. You can consume even more eggs per day occasionally, as long as you make sure that you eat your greens, healthy fats and proteins from other sources.

What is the trick to keto diet? ›

Strategies for encouraging the body to enter ketosis include:
  1. Significantly reducing the carbohydrate intake. ...
  2. Increasing physical activity. ...
  3. Fasting for short periods. ...
  4. Increasing healthful fat intake. ...
  5. Testing ketone levels. ...
  6. Checking protein intake. ...
  7. Consuming more MCT oil.

What is the keto diet for dummies? ›

“Ketogenic” is a term for a low-carb diet (like the Atkins diet). The idea is for you to get more calories from protein and fat and less from carbohydrates. You cut back most on the carbs that are easy to digest, like sugar, soda, pastries, and white bread.

Is peanut butter keto? ›

Peanut butter can definitely be part of a keto diet, but it's best to stick to plain options that are free of extra flavors and sweeteners. Almond butter is a good choice, too, and it's slightly lower in carbs. Additionally, you should be mindful of your portion size if you're trying to lose weight.

What foods should I avoid when starting keto? ›

Keto No-Go - What Can You Not Eat On Keto?
  • On a ketogenic diet, you should avoid high-carb foods like grains, sugars, and some fruits. ...
  • - Grains: Rice, wheat, oats, barley, rye, quinoa, buckwheat, etc.
  • - Starchy Vegetables: Potatoes, peas, sweet potatoes, yams, corn, cassava, artichoke, etc.
Apr 3, 2023

What fruit can you eat on keto? ›

Keto fruits by definition are low in carbohydrates. You still need to exercise portion control with most keto-friendly fruits to be within the limits of a keto diet. Keto-friendly fruits include avocados, watermelon, strawberries, lemons, tomatoes, raspberries, peaches, cantaloupe, star fruit, and blackberries.

What is the simplest way to do keto? ›

Keto Diet for Beginners
  1. Decrease carbs (but eat more veggies) Eating a very low carb diet is important to achieving ketosis, but low carb does not mean no carb. ...
  2. Decrease stress. ...
  3. Increase healthy fats. ...
  4. Increase exercise. ...
  5. Increase your water intake. ...
  6. Maintain your protein intake. ...
  7. Maintain your social life!

What is the correct way to start keto? ›

Following a ketogenic diet is the most effective way to enter ketosis. Generally, this involves limiting carb consumption to around 20 to 50 grams per day and filling up on fats, such as meat, fish, eggs, nuts, and healthy oils ( 6 ). It's also important to moderate your protein consumption.

What happens on day 3 of keto? ›

Day 3. Buckle up. This will probably be the worst carb-flu day you experience. Your body is realizing it's not getting carbs anymore, and the transition process to begin breaking down fats for fuel can feel brutal at first.

What are the do's and don'ts of keto diet? ›

Choose keto-friendly foods that are very low in carbs, like meat, fish, seafood, cheese, and vegetables with real butter. Avoid bread, potatoes, rice, sweets, and other foods that are high in carbs. Eating keto foods can help you lose weight, improve your health, and feel better without ever counting a single calorie!

What can be eaten on a keto diet? ›

Foods you can eat on the keto diet include fish and seafood, meat and poultry, non-starchy vegetables like bell peppers, broccoli, and zucchini, avocados, berries, nuts and seeds, eggs, high-fat dairy products, olive oil and other oils, and high-cocoa chocolate.

What are the key points of a keto diet? ›

Breaking Down the Keto Diet

The keto diet excludes carb-rich foods like grains, beans, fruits and starchy vegetables. 20 percent of calories from protein, such as meat, eggs and cheese. 75 percent of calories from fat, such as oils, unprocessed nuts, butter and avocado.

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