The Importance of Nutrition for Muscle Building: What Should You Eat?

Mar 21, 2025

By Klaas Hutschemakers

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Many athletes think muscle mass is built entirely in the gym. They train intensely but then neglect their diet and wonder why their physique barely changes. The hard truth is that training is only the proverbial 'spark' that ignites the fire; your nutrition is the fuel that keeps the engine running. Without the right macronutrients and calories, muscle growth is simply biologically impossible.

The 24-time Olympia-winning coach Hany Rambod always emphasizes that recovery and nutrition are the decisive factors between an average and an elite physique. To build quality muscle mass without gaining unnecessary fat, you need to structure your meals around three crucial pillars: high-quality proteins for muscle recovery, complex carbohydrates for maximum glycogen storage (and intense muscle pumps), and healthy fats for optimal hormone balance.

Pro tip from the Pro Creator: Consistently getting the right nutrients can be a challenge, especially if you have a busy schedule or struggle with large amounts of solid food. Evogen Nutrition’s high-end supplements help you perfectly fill your nutritional gaps:

The perfect protein base: Easily reach your recovery goals by taking a scoop of Evogen IsoJect immediately after your workout or between meals. This ultra-pure whey isolate breaks down amino acids lightning-fast thanks to IGNITOR™ enzyme technology, without burdening your stomach.
Prevent catabolism during training: Drink Evogen Amino KEM during your workouts to continuously supply your muscle cells with all 9 essential amino acids (EAAs). This protects your muscle mass from breakdown when your energy reserves are low.
Maximize your absorption: Having trouble digesting your meals? Evogen Evozyme supports your digestion in efficiently breaking down macros, so your body actually absorbs the nutrients.

Related reading

Proteins: not a hype, but a must for athletes
The ultimate guide to strong and muscular legs
How to easily eat 30 grams of fiber per day (Without energy dips)

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FAQ

What is the advantage of a protein shake like IsoJect compared to solid food?

Solid foods (such as chicken, steak, or eggs) must first be broken down by your stomach for hours before the amino acids become available. An ultra-pure whey isolate like Evogen IsoJect is already filtered and enriched with digestive enzymes. This allows the nutrients to be absorbed very quickly, which is especially ideal immediately after an intense workout to kickstart the recovery process.

Can I build muscle mass if I eat vegetarian or vegan?

Yes, that is definitely possible. It does require extra planning because plant-based protein sources often have a less complete amino acid profile than animal sources. By combining different plant-based sources (such as rice, beans, and peas) or supplementing with a high-quality EAA supplement like Evogen Amino KEM, you ensure that your body receives all the essential building blocks.

Why are carbohydrates so important if proteins build muscles?

Proteins are the building blocks, but carbohydrates are the construction workers. Carbohydrates are stored in your muscles as glycogen. This is the primary energy source for intense strength training. Moreover, carbohydrates stimulate the release of insulin, a powerful anabolic hormone that helps transport amino acids to your muscle cells faster and more efficiently.

Should I be in a large calorie deficit or a calorie surplus for muscle growth?

To build muscle mass effectively and quickly, your body needs extra energy. A slight calorie surplus (lean bulk) of 200 to 500 calories above your energy requirement is ideal. This provides your body with enough fuel for muscle growth without quickly increasing unwanted body fat.

How many grams of protein do I need per day to effectively build muscle?

For active strength athletes, the scientific guideline is between 1.6 and 2.2 grams of protein per kilogram of body weight per day. For example, if you weigh 80 kilograms, this means you should consume between 128 and 176 grams of high-quality protein daily, spread over 4 to 5 meals for a constant supply of amino acids.

The Importance of Nutrition for Muscle Building: What Should You Eat?

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