What Foods Are In The Keto Diet: Your Comprehensive Guide?

Navigating the ketogenic diet can be a delicious adventure, especially when you know what foods fit the bill. At FOODS.EDU.VN, we provide expert guidance on incorporating healthy fats, moderate protein, and very low carbohydrates into your meals. Discover how to achieve ketosis while enjoying nutrient-rich foods and optimizing your health with our nutrition guides, low-carb recipes, and ketogenic meal plans.

1. What Exactly Is the Keto Diet and How Does It Work?

The keto diet is a high-fat, moderate-protein, and very low-carbohydrate diet designed to shift the body’s primary fuel source from glucose to ketones. This metabolic shift, known as ketosis, occurs when carbohydrate intake is drastically reduced, typically to around 20-50 grams per day.

1.1. The Science Behind Ketosis

When you significantly reduce carbohydrate intake, your body depletes its glycogen stores (stored glucose) and begins to break down stored fat into fatty acids. These fatty acids are then transported to the liver, where they are converted into ketone bodies (ketones). Ketones, such as acetoacetate, beta-hydroxybutyrate, and acetone, become the primary energy source for most cells in the body, including the brain. This metabolic adaptation can lead to weight loss, improved blood sugar control, and other potential health benefits. According to a study by the National Institutes of Health, ketosis can also have therapeutic effects on neurological conditions due to the brain’s ability to efficiently use ketones as fuel.

1.2. Historical and Modern Uses of the Keto Diet

Traditionally, the ketogenic diet was primarily used in clinical settings to manage epilepsy, particularly in children who did not respond well to medication. “Now, there is a lot of interest in the diet’s effectiveness in helping with other neurological conditions, cancer, diabetes, PCOS (polycystic ovary syndrome), obesity, high cholesterol, and cardiovascular disease,” says Emily Stone, M.S., RD, founder of Eat to Enjoy. Today, many people adopt the keto diet for its potential weight loss benefits and overall health improvements. Research published in the Journal of Clinical Endocrinology & Metabolism indicates that ketogenic diets can lead to significant reductions in body weight and improvements in metabolic markers for obese individuals.

1.3. Key Principles of a Ketogenic Diet

To successfully follow a ketogenic diet, it’s essential to understand the macronutrient ratios:

  • Fat: 70-80% of daily calories
  • Protein: 20-25% of daily calories
  • Carbohydrates: 5-10% of daily calories

Achieving and maintaining ketosis requires careful planning and tracking of macronutrient intake. This ensures that your body remains in a state where it is primarily burning fat for fuel. foods.edu.vn offers resources and tools to help you monitor your macros and ensure you are staying on track.

2. What Foods Can You Eat Freely on the Keto Diet?

A variety of delicious and nutritious foods can be enjoyed without restriction on the keto diet, making it both sustainable and satisfying.

2.1. Fish and Seafood: A Keto-Friendly Protein Source

Fish and seafood are excellent choices for the keto diet because they are rich in protein, low in carbohydrates, and packed with essential nutrients. Fatty fish like salmon, sardines, mackerel, and tuna are particularly beneficial due to their high omega-3 fatty acid content. These omega-3s have been shown to improve hemoglobin A1c levels, a measure of blood sugar control over three months.

Fish Type Omega-3 Content (per 3-ounce serving) Benefits
Salmon 1.5-2.0 grams Improves heart health, reduces inflammation
Sardines 1.0-1.5 grams Supports brain function, rich in vitamin D
Mackerel 1.0-1.5 grams Enhances cognitive function, good source of selenium
Albacore Tuna 0.7-1.0 grams Supports eye health, provides lean protein
Shrimp 0.2-0.4 grams Contains antioxidants, low in calories
Lobster 0.1-0.3 grams Rich in minerals, supports immune function
Crab 0.1-0.3 grams Good source of zinc, promotes healthy skin
Oysters 0.4-0.6 grams High in iron, supports energy levels
Mussels 0.3-0.5 grams Rich in vitamin B12, promotes nerve health
Clams 0.1-0.3 grams Good source of vitamin C, supports immune function
Anchovies 1.0-1.5 grams Rich in calcium, supports bone health
Herring 1.0-1.5 grams Supports cardiovascular health, provides vitamin D
Trout 0.8-1.2 grams Supports brain health, good source of potassium
Cod 0.2-0.4 grams Lean protein source, low in fat
Haddock 0.2-0.4 grams Supports muscle growth, low in calories
Pollock 0.2-0.4 grams Good source of selenium, supports thyroid function
Flounder 0.1-0.3 grams Lean protein source, easy to digest
Sole 0.1-0.3 grams Supports heart health, provides lean protein
Halibut 0.5-0.7 grams Good source of magnesium, supports muscle function
Snapper 0.2-0.4 grams Supports eye health, provides lean protein
Swordfish 0.7-1.0 grams Rich in vitamin D, supports bone health
Tilefish 0.5-0.7 grams Good source of selenium, supports thyroid function
Grouper 0.2-0.4 grams Supports immune function, provides lean protein
Monkfish 0.2-0.4 grams Good source of phosphorus, supports bone health
Mahi-Mahi 0.2-0.4 grams Supports heart health, provides lean protein
Yellowfin Tuna 0.5-0.7 grams Rich in vitamin D, supports bone health
Sablefish 1.0-1.5 grams Supports cardiovascular health, provides vitamin D
Jack Mackerel 1.0-1.5 grams Rich in calcium, supports bone health
Bluefish 1.0-1.5 grams Supports cardiovascular health, provides vitamin D
Pompano 0.5-0.7 grams Good source of magnesium, supports muscle function
Spanish Mackerel 1.0-1.5 grams Rich in calcium, supports bone health

Frequent fish intake is also linked to a decreased risk of chronic disease and improved mental health. Aim to eat at least two 3-ounce servings of fatty fish weekly.

:max_bytes(150000):strip_icc()/291245-complete-keto-diet-EWL-food-list-what-you-can-and-cannot-eat-if-youre-on-a-ketogenic-diet-hero-3×2-726ab3875a2840dbb14f5c97bdbecf7e.jpg)

2.2. Low-Carb Vegetables: Essential for Nutrients and Fiber

Non-starchy vegetables are low in calories and carbs but high in essential nutrients like vitamin C and various minerals. They also contain antioxidants that help protect against cell-damaging free radicals. Aim for non-starchy vegetables with less than 8 grams of net carbs per cup. Net carbs are calculated by subtracting fiber from total carbohydrates.

Vegetable Net Carbs per Cup (grams) Benefits
Spinach 1 Rich in iron, vitamins A and K
Kale 4 High in vitamins C and K, antioxidants
Broccoli 6 Good source of fiber, vitamins C and K
Cauliflower 5 Versatile, low-carb alternative to rice and potatoes
Zucchini 3 Mild flavor, good source of vitamin C
Bell Peppers 6 High in vitamin C, antioxidants
Asparagus 2 Good source of folate, vitamins A and K
Green Beans 4 Good source of fiber, vitamins A and C
Brussels Sprouts 5 High in fiber, vitamins C and K
Cabbage 5 Good source of vitamin C, fiber
Lettuce 1 Low in calories, hydrating
Cucumber 2 Hydrating, low in calories
Celery 2 Low in calories, hydrating
Radishes 2 Good source of vitamin C, fiber
Mushrooms 2 Rich in B vitamins, antioxidants
Avocado 2 Healthy fats, potassium
Olives 1 Healthy fats, antioxidants
Eggplant 5 Good source of fiber, antioxidants
Bok Choy 2 Rich in vitamins A and C, antioxidants
Swiss Chard 1 High in vitamins A, C, and K
Arugula 1 Peppery flavor, rich in vitamins A and K
Endive 2 Slightly bitter flavor, good source of fiber
Watercress 0.5 Nutrient-dense, high in vitamins A and C
Turnip Greens 3 High in vitamins A, C, and K
Collard Greens 4 Good source of calcium, vitamins A, C, and K
Leeks 3 Adds flavor, good source of vitamins A and C
Scallions 3 Adds flavor, good source of vitamins A and C
Shallots 5 Adds flavor, good source of vitamins A and C
Okra 4 Good source of fiber, vitamins C and K
Jicama 5 Crunchy texture, good source of fiber
Kohlrabi 5 Mild, sweet flavor, good source of vitamin C
Daikon Radish 4 Sharp, peppery flavor, low in calories
Spaghetti Squash 4 Low-carb alternative to pasta, good source of fiber
Butternut Squash 10 Rich in vitamins A and C, antioxidants
Acorn Squash 11 Good source of fiber, vitamins A and C
Pumpkin 7 Rich in vitamins A and C, antioxidants
Artichokes 7 High in fiber, antioxidants
Hearts of Palm 2 Low in calories, good source of fiber
Bamboo Shoots 3 Crunchy texture, low in calories
Snow Peas 4 Good source of vitamins A and C, fiber
Sugar Snap Peas 5 Sweet flavor, good source of vitamins A and C
Mung Bean Sprouts 3 Crunchy texture, low in calories
Bean Sprouts 2 Low in calories, hydrating
Radicchio 3 Bitter flavor, good source of fiber
Frisee 1 Slightly bitter flavor, good source of fiber
Chicory 2 Bitter flavor, good source of fiber
Seaweed 1 Rich in minerals, supports thyroid function

:max_bytes(150000):strip_icc()/291245-complete-keto-diet-EWL-food-list-what-you-can-and-cannot-eat-if-youre-on-a-ketogenic-diet-Low-Carb-Veggies-fa0e3dd3fcb54216969d6c4bc2eca6b0.jpg)

2.3. Cheese: A Delicious and Convenient Keto Staple

Cheese is a great fit for the ketogenic diet due to its zero-carbohydrate content and high-fat composition. It is also rich in protein and calcium.

Cheese Type Carbs per Ounce (grams) Fat per Ounce (grams) Protein per Ounce (grams) Benefits
Cheddar 1 9 7 Good source of calcium, vitamin D
Mozzarella 1 6 6 Versatile, good source of calcium
Cream Cheese 1 9 2 High in fat, adds creamy texture
Blue Cheese 1 8 6 Distinct flavor, good source of calcium
Parmesan 1 7 10 Rich in protein, adds flavor
Swiss 1 8 8 Good source of calcium, mild flavor
Provolone 1 7 7 Versatile, good source of calcium
Gouda 1 8 7 Slightly sweet flavor, good source of calcium
Brie 0.5 8 6 Creamy texture, mild flavor
Feta 1 6 4 Tangy flavor, good source of calcium
Monterey Jack 1 9 7 Mild flavor, good source of calcium
Colby 1 8 7 Mild flavor, good source of calcium
Havarti 1 9 7 Creamy texture, mild flavor
Muenster 1 8 7 Mild flavor, good source of calcium
Ricotta (Whole Milk) 3 6 4 Creamy texture, good source of calcium
Mascarpone 1 12 1 Rich and creamy, high in fat
Halloumi 1 7 7 High melting point, good for grilling
Gruyere 1 8 8 Nutty flavor, good melting cheese
Fontina 1 9 7 Nutty flavor, good melting cheese
Pecorino Romano 1 9 10 Salty, sharp flavor, good source of calcium
Gorgonzola 1 8 6 Pungent flavor, good source of calcium
Roquefort 1 8 6 Sharp, salty flavor, good source of calcium
Edam 1 8 7 Mild, nutty flavor, good source of calcium
Emmental 1 8 8 Nutty, slightly fruity flavor, good melting cheese
Manchego 1 9 7 Nutty, caramel-like flavor, good source of calcium
Port Salut 1 9 7 Mild, slightly tangy flavor, good source of calcium
Taleggio 1 8 6 Strong, fruity flavor, good melting cheese
Vacherin 1 9 6 Rich, creamy flavor, good melting cheese
Limburger 1 8 6 Strong, pungent flavor, good source of calcium
Cheshire 1 8 7 Mild, slightly tangy flavor, good source of calcium

While cheese is a keto-friendly option, moderation is key due to its saturated fat content.

2.4. Plain Greek Yogurt and Cottage Cheese: High-Protein Dairy Options

Yogurt and cottage cheese are high in protein and calcium-rich. They can be included in a ketogenic diet if you choose higher-fat, plain varieties and monitor your carbohydrate intake.

Dairy Product Carbs per Serving (grams) Protein per Serving (grams) Fat per Serving (grams) Benefits
Plain Greek Yogurt (7 oz) 8 20 0-5 High in protein, probiotic benefits
Cottage Cheese (8 oz) 6 28 1-5 High in protein, good source of calcium
Full-Fat Yogurt (7 oz) 8 8 8-12 Provides healthy fats, probiotic benefits
Full-Fat Cottage Cheese (8 oz) 6 25 10-15 Provides healthy fats, good source of calcium
Kefir (1 cup) 7-12 9-11 2-3 Probiotic benefits, good source of calcium
Sour Cream (2 tbsp) 2 1 5 Adds creamy texture, good source of calcium

Increasing protein intake can help reduce appetite-stimulating hormones, helping you feel fuller for longer. Choosing higher-fat yogurts and cottage cheese can help keep you full even longer. In addition, yogurt and cottage cheese add gut-loving bacteria to your intestines. Just be sure you’re also including fruits and veggies to feed those bacteria and help them thrive.

2.5. Avocados: A Heart-Healthy Fat Source

Avocados are a fantastic addition to the keto diet due to their high monounsaturated fat content and potassium. Half of a medium avocado contains about 6 grams of total carbohydrates, 4.5 grams of which are fiber, resulting in only 1.5 grams of net carbs. It also provides around 360 milligrams of potassium, about 8% of your daily needs.

Nutrient Amount per Half Avocado Daily Value (%) Benefits
Calories 160 N/A Provides energy
Total Fat 15 grams 23% Supports hormone production, nutrient absorption
Monounsaturated Fat 10 grams N/A Improves heart health
Polyunsaturated Fat 2 grams N/A Supports brain function
Saturated Fat 2 grams 10% Provides energy
Carbohydrates 9 grams 3% Provides energy (primarily from fiber)
Fiber 7 grams 28% Promotes digestive health, helps regulate blood sugar
Net Carbs 2 grams N/A Suitable for keto diet
Protein 2 grams 4% Supports muscle growth and repair
Potassium 485 mg 10% Helps regulate blood pressure, supports muscle function
Vitamin K 14 mcg 12% Supports blood clotting, bone health
Vitamin C 6 mg 10% Boosts immune system, antioxidant properties
Folate 82 mcg 21% Supports cell growth and function
Magnesium 22 mg 6% Supports muscle and nerve function, energy production
Vitamin B6 0.2 mg 10% Supports brain development and function

Swapping animal fats for plant fats like avocados can help reduce the risk of cardiovascular disease and type 2 diabetes.

:max_bytes(150000):strip_icc()/291245-complete-keto-diet-EWL-food-list-what-you-can-and-cannot-eat-if-youre-on-a-ketogenic-diet-Avocados-fa4b0b01cb314d9fa2bf6ff7657ee3f2.jpg)

2.6. Meat and Poultry: Staple Protein Sources

Meat and poultry are excellent sources of lean protein and are considered staples on the ketogenic diet. Fresh meat and poultry contain no carbohydrates and are rich in B vitamins and several minerals, including potassium, selenium, and zinc.

Meat/Poultry Type Protein per 3 oz Serving (grams) Fat per 3 oz Serving (grams) Carbs per 3 oz Serving (grams) Benefits
Chicken Breast 26 3 0 Lean protein, rich in B vitamins
Chicken Thigh 25 13 0 Higher fat content, rich in iron
Turkey Breast 25 2 0 Lean protein, rich in selenium
Ground Beef (90% Lean) 22 8 0 Good source of iron, zinc
Steak (Sirloin) 26 8 0 Rich in protein, iron
Pork Loin 26 6 0 Lean protein, rich in thiamine
Bacon 10 30 0 High in fat, adds flavor
Ham 14 4 0 Good source of protein, but can be high in sodium
Lamb 25 19 0 Rich in iron, zinc
Duck 19 28 0 High in fat, rich in iron
Veal 29 5 0 Lean protein, rich in B vitamins
Venison 31 3 0 Lean protein, rich in iron
Rabbit 33 6 0 Lean protein, rich in B vitamins
Goose 25 32 0 High in fat, rich in iron
Quail 24 12 0 Good source of protein, iron
Pheasant 26 11 0 Lean protein, rich in B vitamins
Bison 25 5 0 Lean protein, rich in iron
Ostrich 29 3 0 Lean protein, rich in iron
Emu 30 2 0 Lean protein, rich in iron
Organ Meats (Liver) 20 5 3 High in vitamins and minerals
Organ Meats (Kidney) 26 3 0 High in vitamins and minerals
Organ Meats (Heart) 22 5 0 High in vitamins and minerals
Salami 14 27 2 High in fat, adds flavor
Pepperoni 13 27 2 High in fat, adds flavor
Sausage 14 28 2 High in fat, adds flavor
Prosciutto 14 14 0 Good source of protein, but can be high in sodium

While processed meats, like bacon and sausage, are allowed on keto, they aren’t the best for your heart and may raise your risk of certain types of cancer. Choose chicken, fish, and beef more often and limit processed meats.

2.7. Eggs: A Versatile and Nutrient-Dense Choice

Eggs are high in protein, B vitamins, minerals, and antioxidants. Two large eggs contain zero carbohydrates and over 12 grams of protein.

Nutrient Amount per 2 Large Eggs Daily Value (%) Benefits
Calories 140 N/A Provides energy
Total Fat 10 grams 15% Supports hormone production, nutrient absorption
Saturated Fat 3 grams 15% Provides energy
Cholesterol 372 mg 124% Supports cell structure, hormone production
Protein 12 grams 24% Supports muscle growth and repair
Carbohydrates 1 gram 0% Provides energy (primarily from fiber)
Fiber 0 grams 0% Promotes digestive health
Net Carbs 1 gram N/A Suitable for keto diet
Vitamin D 82 IU 21% Supports bone health, immune function
Vitamin B12 1 mcg 42% Supports nerve function, red blood cell production
Riboflavin 0.5 mg 42% Supports energy production, cell function
Folate 47 mcg 12% Supports cell growth and function
Iron 1.7 mg 9% Supports oxygen transport
Zinc 1 mg 9% Supports immune function, wound healing
Selenium 28 mcg 50% Antioxidant, supports thyroid function
Lutein 326 mcg N/A Supports eye health, antioxidant properties
Zeaxanthin 27 mcg N/A Supports eye health, antioxidant properties
Choline 294 mg 57% Supports brain health, liver function

Eggs promote feelings of fullness and contain antioxidants such as lutein and zeaxanthin, which help protect eye health.

2.8. Nuts, Seeds, and Healthy Oils: Essential Fat Sources

Nuts and seeds are full of healthy polyunsaturated and monounsaturated fats, fiber, and protein. They are also very low in net carbs.

Nut/Seed Type Net Carbs per 1 oz (grams) Total Carbs per 1 oz (grams) Fiber per 1 oz (grams) Benefits
Almonds 3 6 3 Good source of vitamin E, magnesium
Brazil Nuts 1 3 2 Rich in selenium
Cashews 8 9 1 Lower in fat compared to other nuts
Macadamia Nuts 2 4 2 High in monounsaturated fats
Pecans 1 4 3 Good source of antioxidants
Pistachios 5 8 3 Good source of vitamin B6, potassium
Walnuts 2 4 2 Rich in omega-3 fatty acids
Chia Seeds 2 12 10 High in fiber, omega-3 fatty acids
Flaxseeds 0 8 8 High in fiber, omega-3 fatty acids
Pumpkin Seeds 1 3 2 Good source of zinc, magnesium
Sesame Seeds 3 7 4 Good source of calcium, iron
Sunflower Seeds 4 7 3 Good source of vitamin E, selenium
Hemp Seeds 2 3 1 Complete protein source, rich in omega-3 and omega-6 fatty acids
Pine Nuts 3 4 1 Good source of vitamin E, zinc
Hazelnuts 2 5 3 Good source of vitamin E, manganese
Coconut Flakes 2 5 3 High in fiber, healthy fats
Almond Butter 3 6 3 Good source of protein, vitamin E
Peanut Butter 6 7 1 Good source of protein, but can be high in carbs
Cashew Butter 8 9 1 Creamy texture, good source of minerals
Macadamia Butter 2 4 2 High in monounsaturated fats
Pecan Butter 1 4 3 Good source of antioxidants
Sunflower Butter 4 7 3 Good source of vitamin E, selenium
Tahini (Sesame Seed Butter) 3 7 4 Good source of calcium, iron
Brazil Nut Butter 1 3 2 Rich in selenium
Hazelnut Butter 2 5 3 Good source of vitamin E, manganese

Olive oil and coconut oil are the two oils most recommended on the keto diet. Olive oil is high in oleic acid and is associated with a lower risk of heart disease. Coconut oil is high in saturated fat but contains medium-chain triglycerides (MCTs), which can increase ketone production. MCTs may increase metabolic rate and promote the loss of weight and belly fat too. Be sure to measure portion sizes when consuming any healthy fat.

:max_bytes(150000):strip_icc()/291245-complete-keto-diet-EWL-food-list-what-you-can-and-cannot-eat-if-youre-on-a-ketogenic-diet-Nuts-c5125350d8b043908e1a8bf19dbd2e73.jpg)

2.9. Berries: Antioxidant-Rich Fruits

Berries are rich in antioxidants that reduce inflammation and protect against disease. They are relatively low in carbs and high in fiber compared to other fruits.

Berry Type Net Carbs per 1/2 Cup (grams) Total Carbs per 1/2 Cup (grams) Fiber per 1/2 Cup (grams) Benefits
Blackberries 3 7 4 Rich in antioxidants, vitamin C
Blueberries 9 11 2 High in antioxidants, vitamin K
Raspberries 3 7 4 Rich in antioxidants, manganese
Strawberries 3 6 3 High in vitamin C, antioxidants
Cranberries 4 6 2 Supports urinary tract health, rich in antioxidants
Goji Berries 11 14 3 High in antioxidants, vitamins, and minerals
Acai Berries 2 3 1 Rich in antioxidants, supports heart health
Elderberries 7 10 3 Supports immune function, rich in antioxidants
Mulberries 7 9 2 Good source of iron, antioxidants
Lingonberries 6

Comments

No comments yet. Why don’t you start the discussion?

Leave a Reply

Your email address will not be published. Required fields are marked *