High-protein diet: benefits and how to start

What actually counts as "high protein"?

There's no single official cut-off, but most research and dietetic guidance treats intakes above roughly 1.2–2.0 grams of protein per kilogram of body weight per day as "high protein", compared with the standard reference intake of around 0.8g/kg used for general health.

• 0.8g/kg/day: minimum to prevent deficiency in a sedentary adult
• 1.2–1.6g/kg/day: a common, well-supported range for weight management or active lifestyles
• 1.6–2.0g/kg/day (occasionally higher): often used by people doing regular resistance training or actively losing fat while trying to preserve muscle

Percentage-of-calories targets (for example, 25–35% of total energy from protein) are another way to frame it and tend to land in a similar practical range for most people.

Why people choose a higher-protein diet

Protein behaves differently in the body compared with carbohydrate and fat, which is why it's often highlighted for weight management and fitness goals.

• Satiety: Protein is generally more filling per calorie than carbohydrate or fat, which can help reduce hunger and make it easier to manage overall calorie intake.
• Muscle retention: During weight loss, adequate protein — combined with resistance training — helps the body hold on to more lean muscle rather than losing it alongside fat.
• Thermic effect of food: Digesting and processing protein uses slightly more energy than digesting carbs or fat, giving a small metabolic edge, though this effect is modest and not a shortcut to significant weight loss on its own.
• Recovery and adaptation: For people who exercise regularly, higher protein intakes support muscle repair and adaptation after training.

It's worth being realistic: protein is a useful tool within an overall balanced, calorie-appropriate diet, not a magic switch. The biggest results still come from consistent habits over time.

How much protein do you actually need?

Your ideal target depends on body weight, activity level, age, and goals (fat loss, muscle gain, or general maintenance). A simple starting approach:

• Generally active adults: around 1.2–1.6g of protein per kg of body weight per day
• Actively strength training or in a calorie deficit: closer to 1.6–2.0g/kg
• Older adults: research suggests slightly higher intakes (toward the upper end of these ranges) may help protect muscle mass with age

Rather than doing this maths manually, it's easier to use a protein calculator (like the one built into Nutari) that factors in your weight, goal, and activity level to give you a personalised daily target, then track your meals against it.

Best protein sources across different diets

You don't need to eat meat to hit a high-protein target — you just need a bit more planning on plant-based diets, since some plant proteins are lower in certain amino acids or less concentrated by weight.

• Omnivore: chicken breast, turkey, lean beef, fish, eggs, Greek yoghurt, cottage cheese, milk
• Vegetarian: eggs, Greek yoghurt, cottage cheese, cheese, quark, whey protein powder
• Vegan/plant-based: tofu, tempeh, edamame, lentils, chickpeas and other pulses, seitan, soy milk, plant-based protein powders (pea, soy, or blended)
• Convenient boosters: protein powders, high-protein pasta or bread, protein-fortified dairy alternatives

A well-organised high-protein food list — grouped by diet type, with grams of protein per portion — makes meal planning far quicker; Nutari's food database and lists are useful for finding these at a glance.

Sample high-protein day

Here's an example for someone targeting roughly 120–140g of protein across the day (adjust portions to your own calculated target):

• Breakfast: Greek yoghurt with berries and a tablespoon of nuts, or scrambled eggs on wholegrain toast
• Lunch: Grilled chicken, tofu, or a lentil-based salad with wholegrains and vegetables
• Snack: Cottage cheese or a protein shake with fruit
• Dinner: Fish, lean beef, or tempeh stir-fry with rice and plenty of vegetables
• Optional evening snack: Skyr, quark, or a small handful of edamame

Spreading protein fairly evenly across 3–4 meals, rather than loading it all into one, tends to support both satiety and muscle protein synthesis better than one very large protein-heavy meal.

Is a high-protein diet safe for your kidneys?

For people with healthy kidney function, the current evidence does not show that moderately high protein intakes (within the ranges discussed above) cause kidney damage. Kidneys are well-equipped to handle a range of protein intakes in healthy individuals.

However, if you have existing kidney disease, a family history of kidney problems, or any condition affecting kidney function, higher protein intakes may need to be limited and should be discussed with your doctor or a registered dietitian before making changes. The same caution applies if you're pregnant, have liver conditions, or are on a specialised medical diet.

As with any dietary shift, increasing protein gradually, drinking enough water, and pairing it with plenty of fibre-rich vegetables and wholegrains supports overall digestive comfort and general health.