How much protein per day

Protein is the most discussed macronutrient in nutrition — and for good reason. It builds muscle, supports immunity, regulates satiety, and participates in hundreds of enzymatic reactions. But the question remains: how much do you need? The answer depends on your profile, not a one-size-fits-all recommendation.

Steps

1

Determine your reference weight

Use your current weight if you are within a normal weight range. If you are significantly overweight, use your target weight or estimated lean mass instead. This reference weight will serve as the base for the calculation.

2

Choose your coefficient based on activity

Sedentary: 0.8 to 1.0 g/kg. Moderately active: 1.2 to 1.6 g/kg. Weight training or intense sport: 1.6 to 2.2 g/kg. Hypocaloric diet: go up to 2.0-2.4 g/kg to protect your muscle mass while in a deficit.

3

Calculate your daily requirement

Multiply your reference weight by the chosen coefficient. Example: a 65 kg woman doing weight training 4 times a week → 65 x 1.8 = 117 g of protein per day, or about 468 kcal from protein.

4

Distribute across your meals

The body absorbs protein better in portions of 25-40 g per meal. For 120 g daily over 3 meals + 1 snack: about 30 g per serving. This distribution optimally stimulates muscle protein synthesis throughout the day.

5

Prioritize complete sources

A complete protein contains all essential amino acids. Animal sources (meat, fish, eggs, dairy) and some plant sources (soy, quinoa, buckwheat) are complete. If you're vegetarian, combine legumes and grains to cover all amino acids.

Why protein is essential

Protein performs functions that other macros can't: muscle building and repair, production of enzymes and hormones, oxygen transport (hemoglobin), and immune defenses (antibodies). Insufficient intake leads to muscle loss, slow recovery, weakened immunity, and persistent hunger. It's the only macronutrient where a deficiency has quickly visible consequences.

Best sources by protein quality

The DIAAS score (Digestible Indispensable Amino Acid Score) ranks proteins by quality: whole milk and eggs come out on top (DIAAS > 1.0), followed by chicken and fish. On the plant side, soy is the champion (DIAAS 0.90), followed by chickpeas and lentils. Rice and wheat alone have a low DIAAS, but combined with legumes, they complement each other perfectly. Don't overlook cottage cheese, skyr, and tofu — affordable and versatile sources.

Timing and distribution throughout the day

Research shows that spreading your protein evenly across meals is more effective than one large intake in the evening. Aim for 0.3-0.5 g/kg per meal, 3 to 4 times a day. Breakfast is often the meal lowest in protein — a simple addition of eggs or Greek yogurt can make a difference. After training, an intake of 20-40 g within 2 hours promotes recovery, but it's not as urgent as supplement sellers claim.

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Frequently Asked Questions

Is too much protein dangerous for the kidneys?
For healthy kidneys, no studies have shown a risk with high intake (up to 2.2 g/kg). However, if you have an existing kidney disease, consult your doctor. High recommendations don't apply to everyone.
Is protein powder necessary?
No. Powders are a convenient supplement, not a necessity. If you reach your target with whole foods, they aren't needed. They become useful if you struggle to meet your quota or need a quick source post-workout.
How much protein for breakfast?
Aim for at least 20-30 g. Two eggs + a Greek yogurt, or cottage cheese with chia seeds. This protein-rich breakfast reduces hunger in the morning and stabilizes blood sugar better than a sugary breakfast.
Is plant-based protein enough for bodybuilding?
Yes, as long as you vary your sources and aim for a slightly higher intake (2.0-2.4 g/kg) to compensate for lower digestibility. Soy, seitan, and grain-legume combinations provide all necessary amino acids.
Do my needs change as I age?
Yes, and they increase. After age 50, anabolic resistance increases: the body needs more protein to maintain muscle mass. Aim for at least 1.2-1.6 g/kg, even without intense sport.

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