A high protein, low carb diet typically means eating 60 to 130 grams of carbohydrates per day while getting at least 25 to 35 percent of your calories from protein. In practical terms, that translates to filling most of your plate with meat, fish, eggs, and vegetables while cutting back on bread, pasta, rice, and sugary foods. The specifics vary depending on your body weight, activity level, and goals, but the core framework stays the same.
How the Numbers Break Down
For protein, physically active people generally need 1.4 to 2.0 grams per kilogram of body weight per day. If you weigh 70 kg (about 154 pounds), that’s roughly 100 to 140 grams of protein daily. Even if you’re not particularly active, aiming for the higher end of that range is the whole point of a “high protein” approach.
On the carb side, most low carb diets land between 60 and 130 grams per day. Dropping below 60 grams pushes you toward ketosis, where your body starts burning fat for fuel instead of carbohydrates. That’s a different strategy with its own tradeoffs. A standard low carb approach keeps you above that threshold, which gives you more flexibility with vegetables, fruits, and legumes. The remaining calories come from fat: olive oil, nuts, avocado, butter, and the fat naturally present in your protein sources.
What You Actually Eat
The backbone of this diet is animal protein. A 3-ounce serving of cooked chicken breast has 18 grams of protein and zero carbs. The same amount of cod delivers 19 grams of protein with zero carbs. Turkey breast is even more protein-dense at 34 grams per 4-ounce serving. Pork tenderloin, lean beef sirloin, shrimp, tuna canned in water, and eggs all provide substantial protein with essentially no carbohydrates.
A realistic day might look like this: three eggs scrambled with spinach and cheese for breakfast (about 24 grams of protein, under 3 grams of carbs). Lunch could be a large salad with grilled chicken, avocado, cucumber, and olive oil dressing (around 35 grams of protein, 8 to 10 grams of carbs). Dinner might be pan-seared salmon with roasted broccoli and cauliflower (30+ grams of protein, about 7 grams of carbs). Snacks like a handful of almonds, a hard-boiled egg, or some deli turkey fill in the gaps.
For plant-based eaters, the options are trickier because most plant proteins come packaged with carbohydrates. Edamame is one of the best choices: half a cup provides 11 grams of protein with 9 grams of carbs. Soy nuts deliver 9 grams of protein per ounce with about 7 grams of carbs. Lentils and black beans are solid protein sources, but at 20 grams of carbs per half cup, they eat into your daily carb budget quickly. If you’re combining plant and animal sources, you have more room to include these.
Best Vegetables for Low Carb Eating
Non-starchy vegetables are your main source of fiber, vitamins, and volume on this diet. The key metric is net carbs: total carbohydrates minus fiber, since fiber doesn’t raise blood sugar. Leafy greens are the clear winners. A cup of raw kale has essentially zero net carbs. Lettuce, celery, and mushrooms each have about 1 gram of net carbs per cup. Spinach, zucchini, cauliflower, asparagus, and cabbage all come in around 3 grams of net carbs per serving.
Slightly higher but still very manageable: broccoli, cherry tomatoes, and Brussels sprouts at about 4 grams of net carbs per serving. Bell peppers, green beans, and eggplant sit around 6 grams. Avocado deserves special mention. Despite having 13 grams of total carbs per cup, 10 of those are fiber, leaving just 3 grams of net carbs along with plenty of healthy fat.
Why Protein Keeps You Full
One reason this approach works for weight management is that protein is the most satiating macronutrient. When protein hits your intestines, your gut releases a hormone called GLP-1 that signals your brain to reduce hunger and promote feelings of fullness. This effect works through both short-term meal signals and longer-term appetite regulation, which is why high protein meals tend to keep you satisfied for hours rather than leaving you reaching for snacks.
Protein also costs your body more energy to digest. Your metabolic rate increases by 15 to 30 percent when processing protein, compared to 5 to 10 percent for carbohydrates and just 0 to 3 percent for fat. This thermic effect means that out of every 100 calories of protein you eat, your body burns 15 to 30 of them just breaking the food down. Over the course of a day, that adds up.
How Much Protein Per Meal
Your body can only use so much protein at once for building and repairing muscle. Research shows that about 0.3 to 0.4 grams per kilogram of body weight per meal maximizes muscle protein synthesis. For a 70 kg person, that’s roughly 20 to 28 grams per meal. Eating 40 grams in a single sitting doesn’t provide a meaningful boost over 20 grams when it comes to muscle building. The excess gets oxidized for energy instead.
The practical takeaway: spread your protein across three or four meals rather than loading it all into dinner. Three meals with 25 to 35 grams of protein each, spaced about three hours apart, is more effective for maintaining muscle than eating a small breakfast and a massive steak at night. This matters especially if you’re exercising regularly or trying to preserve muscle while losing fat.
Nutrients to Watch For
Cutting carbohydrates means cutting out or reducing whole grains, many fruits, and starchy vegetables, and those foods carry vitamins you still need. The nutrients most likely to fall short on a low carb diet are folate, thiamin (vitamin B1), calcium, magnesium, and iron. A systematic review of adults following carb-restricted diets found consistent deficiencies in all five.
You can close most of these gaps with deliberate food choices. Magnesium comes from nuts, seeds, and leafy greens, all of which fit comfortably in a low carb plan. Calcium is easy if you eat dairy: cheese, yogurt, and milk. Folate is trickier since its richest sources are fortified grains and legumes, so you may need to lean on spinach, asparagus, and eggs. Selenium, another mineral worth tracking, is abundant in seafood, organ meats, and Brazil nuts. If your diet is very restrictive on the carb side, a multivitamin can serve as a safety net for the nutrients that slip through.
Is High Protein Safe for Your Kidneys?
This is one of the most common concerns, and the short answer for healthy adults is reassuring. A systematic review of 26 studies found that protein intake above the recommended daily allowance had no adverse effect on blood markers of kidney function in people without preexisting kidney disease. Most studies did find that higher protein intake increased the kidney’s filtration rate, but those rates stayed within the normal, healthy range. There was also no consistent link between higher protein and elevated blood pressure.
The important caveat: nearly all of these studies lasted less than six months, so the very long-term picture is less clear. And if you already have chronic kidney disease, higher protein intake is a different conversation entirely. For people with healthy kidneys, though, eating 1.4 to 2.0 grams of protein per kilogram of body weight appears to be safe based on available evidence.