Plain steak contains zero carbohydrates. Beef is purely protein and fat, making it one of the most reliably low-carb foods you can eat. Whether you’re following a ketogenic diet, counting carbs for blood sugar management, or just curious, steak fits comfortably into any low-carb eating plan without needing to track a single gram of carbohydrate.
Why Steak Has Zero Carbs
Carbohydrates come from plant-based sources: sugars, starches, and fiber. Animal muscle tissue doesn’t contain any of these in meaningful amounts. A ribeye, sirloin, tenderloin, or strip steak all clock in at 0g of carbohydrates per serving, regardless of the cut or how you cook it. This applies to all plain beef, whether grilled, pan-seared, broiled, or roasted.
Because steak has essentially no carbohydrate content, it doesn’t even receive a glycemic index value. Diabetes Canada groups beef alongside other animal proteins that have “little to no impact on blood sugar.” For anyone managing blood glucose levels, plain steak is about as neutral as food gets.
What Steak Does Contain
While steak brings zero carbs to the table, it’s far from nutritionally empty. A typical serving is dense in protein and fat, with the ratio shifting depending on the cut. Leaner cuts like top sirloin and tenderloin are higher in protein relative to fat, while fattier cuts like ribeye deliver more calories from fat, which is actually preferred on ketogenic diets.
Steak is also a concentrated source of several micronutrients. Per 100 grams of lean beef, a ribeye provides about 70% of your daily vitamin B12 and 41% of your daily selenium. Top sirloin is even higher in B12, reaching roughly 73% of your daily needs in the same portion. Zinc comes in at around 20 to 25% of daily value across most cuts. Iron is more modest at 7 to 9%, but it’s in the heme form, which your body absorbs much more efficiently than the iron found in plant foods.
B12 is essential for nerve function and red blood cell production, and it’s found almost exclusively in animal products. Selenium supports thyroid function and acts as an antioxidant. These nutrients make steak more than just a protein source.
Where Hidden Carbs Sneak In
Plain steak has no carbs, but the moment you add a marinade, sauce, or glaze, that can change. This is the detail most people searching this question actually need to watch.
Teriyaki sauce is one of the worst offenders, often containing sugar and corn syrup that can add 8 to 12 grams of carbs per serving. Honey-garlic marinades, balsamic glazes, and barbecue sauces all carry sugar. Even a basic steakhouse marinade runs about 2 grams of carbs per tablespoon, which sounds small but adds up when the steak has been soaking in it.
Restaurant steaks are the biggest wildcard. Many chains marinate their steaks or finish them with butter-based sauces that include flour or sugar. If you’re strictly tracking carbs, ordering your steak with just salt, pepper, and plain butter is the safest approach. At home, seasoning with salt, pepper, garlic powder, and herbs keeps your steak at zero carbs.
Breaded or chicken-fried steak is in a different category entirely. The flour or breadcrumb coating can add 20 or more grams of carbs per serving, turning a zero-carb protein into something closer to a sandwich.
Steak on Keto and Low-Carb Diets
Steak is a staple of ketogenic eating for good reason. Most keto protocols call for keeping daily carbs under 20 to 50 grams, and steak contributes nothing to that count while providing the protein and fat that form the foundation of the diet. Fattier cuts like ribeye are especially popular because the higher fat content helps people hit their fat targets without needing to add extra oils or butter.
On a carnivore diet, steak often serves as the primary food. Because it provides protein, fat, B12, zinc, selenium, and iron with zero carbs, it covers a wide nutritional base on its own. The beneficial protein-to-fat ratio in beef makes it a natural fit for any eating pattern that restricts carbohydrates.
Low-Carb Sides That Keep Your Meal on Track
The steak itself won’t cost you any carbs, so the real question is what you put next to it. A baked potato adds 35 or more grams of carbs. A side of fries can easily hit 40 to 50 grams. Choosing the right accompaniment is what determines whether your steak dinner stays low-carb.
Some of the best options:
- Mashed cauliflower as a swap for mashed potatoes, typically 4 to 6 grams of net carbs per serving
- Sautéed spinach, kale, or chard cooked in butter or olive oil
- Roasted broccoli or asparagus with olive oil and garlic
- Caesar salad without croutons
- Brussels sprouts roasted with bacon
- Zucchini noodles as a pasta substitute
- Cauliflower rice in place of white or brown rice
- Stuffed mushrooms filled with cheese and herbs
Green beans are a reasonable choice but slightly higher in carbs than other vegetables on this list, so portion size matters if you’re aiming to stay under a strict daily limit. Leafy green salads with olive oil and a squeeze of lemon are one of the simplest, lowest-carb pairings you can make.
Comparing Steak to Other Proteins
Most unprocessed animal proteins share steak’s zero-carb status: chicken breast, pork chops, lamb, and fish all contain no carbohydrates when prepared plain. Where steak stands out is in its fat content (useful for keto) and its micronutrient density, particularly B12 and zinc, which are higher in beef than in poultry or most fish.
Processed meats are a different story. Sausages, deli meats, and jerky often contain added sugars, fillers, or starches that introduce carbs. A serving of beef jerky can have 5 to 10 grams of carbs depending on the brand. Always check labels on anything that isn’t a whole cut of meat.
Eggs, another low-carb staple, contain less than 1 gram of carbs each. Cheese varies by type but generally stays under 1 to 2 grams per ounce. Pairing steak with eggs or a cheese topping keeps an entire meal effectively at zero carbs.