How Much Protein Per Day to Build Muscle

A general guideline of 1.6 to 2.2 grams of protein per kilogram of body weight is effective for most people engaged in resistance training.

How Much Protein Per Day to Build Muscle: Here is an In-Depth Guide. Building muscle is a complex process that requires a combination of resistance training, adequate rest, and proper nutrition. Among these, protein intake is crucial as it provides the essential amino acids needed for muscle repair and growth. But how much protein do you actually need per day to build muscle effectively? Let’s dive into the science and expert recommendations to give you a comprehensive understanding.

Table of Contents:

Understanding Protein and Muscle Growth

Protein is a macronutrient composed of amino acids, which are the building blocks of muscle tissue. When you engage in resistance training, you create small tears in your muscle fibers. The body repairs these tears by synthesizing new proteins, which increases muscle mass over time. This process, known as muscle protein synthesis (MPS), requires an adequate supply of dietary protein.

Factors Influencing Protein Requirements

Several factors influence how much protein you need to build muscle, including:

  1. Age: Older adults may require more protein to counteract the age-related decline in muscle mass and protein synthesis efficiency.
  2. Gender: Men typically have more muscle mass than women and may require more protein.
  3. Body Weight: Heavier individuals require more protein to support their larger muscle mass.
  4. Activity Level: Those engaged in intense or frequent training need more protein for recovery and growth.
  5. Training Experience: Novices may need less protein compared to seasoned athletes who are pushing their limits.

General Guidelines

The Recommended Dietary Allowance (RDA) for protein is 0.8 grams per kilogram of body weight for the average adult. However, this amount is not sufficient for those looking to build muscle. According to the International Society of Sports Nutrition (ISSN), individuals engaging in regular resistance training should consume between 1.6 to 2.2 grams of protein per kilogram of body weight per day (0.73 to 1 gram per pound) .

Specific Recommendations

  1. Novice Lifters: Those new to resistance training may start at the lower end of the spectrum, around 1.6 grams per kilogram of body weight. This level provides enough protein to support initial muscle growth.
  2. Intermediate to Advanced Lifters: More experienced individuals should aim for the higher end, around 2.2 grams per kilogram, to maximize muscle protein synthesis and recovery .
  3. Older Adults: Given the anabolic resistance in older adults, a higher protein intake of around 1.8 to 2.4 grams per kilogram may be beneficial .

Practical Example

For a 70 kg (154 lbs) individual aiming to build muscle:

  • Novice lifter: 70 kg x 1.6 g = 112 grams of protein per day.
  • Experienced lifter: 70 kg x 2.2 g = 154 grams of protein per day.

Protein Timing and Distribution

Not only is the total daily protein intake important, but how you distribute it throughout the day also matters. Research suggests that consuming protein evenly across meals (approximately 20-40 grams per meal) can optimize muscle protein synthesis . Additionally, consuming a protein-rich meal or snack within two hours post-exercise can further enhance MPS and recovery.

Types of Protein

Complete Proteins

Complete proteins contain all nine essential amino acids in sufficient quantities. These are typically found in animal-based sources such as:

  • Meat: Beef, pork, lamb
  • Poultry: Chicken, turkey
  • Fish: Salmon, tuna, cod
  • Dairy: Milk, cheese, yogurt
  • Eggs: Whole eggs and egg whites

Plant-Based Proteins

For those following a vegetarian or vegan diet, combining different plant-based proteins can ensure you get all essential amino acids. Good sources include:

  • Legumes: Beans, lentils, chickpeas
  • Grains: Quinoa, brown rice, oats
  • Nuts and Seeds: Almonds, chia seeds, hemp seeds
  • Soy Products: Tofu, tempeh, edamame

Protein Supplements

Protein supplements, such as whey, casein, and plant-based protein powders, can help you meet your daily protein needs conveniently. Whey protein is particularly popular due to its high biological value and rapid absorption, making it ideal post-workout .

Potential Risks of Excessive Protein Intake

While protein is essential for muscle growth, excessively high intakes can pose risks. Extremely high protein diets may lead to:

  • Kidney Strain: Particularly in individuals with preexisting kidney conditions.
  • Dehydration: As the body needs more water to metabolize protein.
  • Nutrient Imbalance: If protein intake displaces other essential nutrients in the diet.

Most healthy individuals can safely consume up to 2.2 grams per kilogram of body weight without adverse effects, but it is always best to consult with a healthcare professional before making significant dietary changes .

FAQs: Protein Intake for Muscle Building

1. How much protein should I consume per day to build muscle?

To build muscle, aim for 1.6 to 2.2 grams of protein per kilogram of body weight per day (0.73 to 1 gram per pound). Novice lifters can start at the lower end, while more experienced lifters should target the higher end.

2. Can I consume too much protein?

While protein is essential, excessive intake can lead to potential risks such as kidney strain, dehydration, and nutrient imbalances. Generally, up to 2.2 grams per kilogram of body weight is safe for healthy individuals, but it’s wise to consult a healthcare professional before making significant changes.

3. What are the best sources of protein for muscle building?

Complete protein sources such as meat, poultry, fish, dairy, and eggs are excellent. For plant-based diets, combine legumes, grains, nuts, seeds, and soy products to ensure a complete amino acid profile.

4. When should I eat protein for optimal muscle growth?

Distribute protein intake evenly throughout the day, consuming around 20-40 grams per meal. Eating a protein-rich meal or snack within two hours post-exercise can enhance muscle protein synthesis and recovery.

5. Do I need protein supplements to build muscle?

Protein supplements like whey, casein, and plant-based powders can help you meet your daily protein needs conveniently. They are especially useful if you struggle to get enough protein from whole foods alone.

6. Is plant-based protein as effective as animal-based protein for building muscle?

Yes, plant-based protein can be effective for muscle building. However, it’s important to combine different plant sources to ensure you get all essential amino acids. Plant-based protein powders can also be a good addition.

7. How does age affect protein requirements for muscle building?

Older adults may require higher protein intakes (around 1.8 to 2.4 grams per kilogram of body weight) to counteract anabolic resistance, a reduced efficiency in muscle protein synthesis.

8. Can I build muscle with a low-protein diet?

Building muscle on a low-protein diet is challenging and not recommended. Adequate protein intake is crucial for muscle repair and growth, and insufficient protein can hinder your progress.

9. How do I calculate my protein needs based on body weight?

Multiply your body weight in kilograms by the recommended protein range (1.6 to 2.2 grams). For example, a 70 kg person would need 112 to 154 grams of protein per day.

10. Are there any side effects of high protein diets?

For most healthy individuals, high protein diets up to 2.2 grams per kilogram of body weight are safe. However, extremely high intakes can cause kidney strain in those with preexisting kidney conditions, dehydration, and nutrient imbalances if other essential nutrients are neglected.

11. Do women need less protein than men for muscle building?

Protein requirements for muscle building are generally based on body weight rather than gender. However, because men typically have more muscle mass, their absolute protein needs might be higher.

12. How important is protein quality in muscle building?

Protein quality is crucial as it affects the availability of essential amino acids. Complete proteins (containing all nine essential amino acids) are typically more effective for muscle building. Combining various plant-based proteins can achieve similar results.

13. Is it necessary to eat protein immediately after a workout?

While the anabolic window (immediate post-workout period) is less critical than previously thought, consuming protein within two hours after exercise can still be beneficial for muscle recovery and growth.

14. Can protein intake help with fat loss while building muscle?

Yes, a higher protein intake can support fat loss by promoting satiety, preserving lean muscle mass during caloric deficits, and increasing thermogenesis (calorie burning through digestion).

By addressing these common questions, you can better understand how to optimize your protein intake for effective muscle building and overall health.


Determining the right amount of protein per day to build muscle involves considering your individual characteristics and goals. A general guideline of 1.6 to 2.2 grams of protein per kilogram of body weight is effective for most people engaged in resistance training. Distributing protein intake evenly throughout the day and choosing high-quality protein sources can further enhance muscle growth and recovery. Always remember to balance your diet to include all essential nutrients for overall health and well-being. Also see: How to Lower LDL Cholesterol: Tips, Diet Plans & Lifestyle Changes


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By following these guidelines and tailoring your protein intake to your specific needs, you can effectively support your muscle-building goals and overall fitness journey.