How Much Protein Do You Need Per Day?

Quick answer: Most adults need a minimum of 0.8 grams of protein per kilogram of body weight daily. However, active individuals, older adults, and those looking to build muscle may benefit from higher intakes, ranging from 1.2 to 2.2 grams per kilogram of body weight to support muscle maintenance, growth, and overall health.

Quick facts

• Minimum recommended intake: 0.8 grams per kilogram of body weight.
• Active individuals often benefit from 1.2–1.7 grams per kg per day.
• Older adults may need 1.0–1.2 grams per kg to prevent muscle loss.
• For muscle building, 1.6–2.2 grams per kg per day is commonly recommended.
• One gram of protein provides approximately 4 calories.
• Spread protein intake throughout the day for optimal absorption and benefits.

Protein is a critical macronutrient, essential for building and repairing tissues, making enzymes and hormones, and supporting immune function. Meeting your daily protein requirements is fundamental for everyone, from sedentary individuals to elite athletes.

How much protein do adults need per day?

The minimum recommended dietary allowance (RDA) for protein for a sedentary adult is 0.8 grams per kilogram (kg) of body weight per day Source. To convert pounds to kilograms, divide your weight in pounds by 2.2. For example, a 150-pound (68 kg) individual would need at least 54.4 grams of protein daily (68 kg x 0.8 g/kg).

Does activity level affect protein needs?

Yes, your activity level significantly impacts your protein requirements. Individuals who engage in regular physical activity, especially resistance training, need more protein to repair muscle damage and support muscle growth. Active adults generally aim for 1.2–1.7 grams of protein per kg of body weight per day. For a 150-pound (68 kg) active individual, this translates to roughly 82–116 grams of protein daily.

Example:

• A 180-pound (81.8 kg) sedentary person needs 81.8 kg * 0.8 g/kg = 65.4 grams of protein.
• A 180-pound (81.8 kg) active person might aim for 81.8 kg * 1.5 g/kg = 122.7 grams of protein.

How much protein is recommended for muscle growth?

For optimal muscle growth and maintenance, individuals engaged in strength training or bodybuilding often target higher protein intakes. Recommendations typically fall within the range of 1.6–2.2 grams of protein per kilogram of body weight per day Source. This higher intake helps maximize muscle protein synthesis, leading to better gains in muscle mass.

• Muscle building: 1.6–2.2 grams of protein per kg of body weight.
• Older adults (to prevent muscle loss): 1.0–1.2 grams of protein per kg of body weight.

Can special conditions or diets change protein needs?

Certain situations and dietary patterns can alter protein requirements. For instance, pregnant or breastfeeding women have increased protein needs to support fetal development and milk production. Those recovering from injuries or surgery also require more protein for tissue repair and healing. Additionally, individuals following plant-based diets may need to pay closer attention to protein sources and ensure a varied intake to obtain all essential amino acids.

What are common sources of protein?

Protein can be found in a wide variety of foods. Here are some common examples:

• Animal-based sources: Lean meats (chicken, beef), fish, eggs, dairy products (milk, yogurt, cheese).
• Plant-based sources: Legumes (beans, lentils), tofu, tempeh, quinoa, nuts, seeds, and certain grains.

Incorporating a mix of these sources throughout your day helps ensure you consume a complete amino acid profile, which is important for overall health and bodily functions.