What Are Mass and Muscle Gainers

What Are Mass and Muscle Gainers

Mass building supplements are high-calorie protein powders which are designed to help bodybuilders and athletes who need to gain weight quickly. They are commonly used by individuals with an ectomorph body type who typically battle to gain muscle mass. You may also know them as “hardgainers”.

Why use a mass builder?

The reason to use a mass builder rather than a whey protein or meal replacement shake is that they contain a large amount of calories per serving, generally between 600 – 1000 plus calories. This makes them the ideal choice for those who are on high-calorie diets which are common during a bulking phase as it can become difficult to consume 3000 – 4000 calories per day worth of wholefoods.

When should you consume a mass builder?

When you are looking to build mass, you can consume a mass builder as a snack between meals or pre- and post workout. The main aim is to add more calories to your diet.

What is in a mass builder?

The primary constituents of a mass builder include protein and carbs.


The common sources of protein in most mass builders include:

  1. Whey protein (concentrate & isolate)
  2. Casein Protein
  3. Soy protein
  4. Egg Albumen

Most mass builders contain a blend of fast, medium and even slow-absorbing protein sources. The benefit of having a blend instead of only one protein source is that with a blend, you will get a complete amino acid profile. Consuming a sufficient amount of protein is vital for the repair and rebuilding of muscle tissue. A good mass builder should contain between 30g – 40g of protein per serving.



The common sources of protein in most mass builders include:

  1. Dextrose
  2. Maltodextrin
  3. Fructose

If you are serious about gaining weight, then your nutrition plan should consist of at least 40% carbohydrates. Quality carbs provide energy to fuel vigorous exercise and improve protein transport and utilization. It’s very important to consume carbohydrates post-training as they aid in muscle glycogen replenishment. Depending on the carbohydrate type, high GI or low GI, mass gainers will either be focused more for post-workout (high GI carbs) or as a meal replacement (low GI carbs). A good quality mass builder should contain a minimum of 50g of carbohydrates.

What else is in a mass builder?

It is common for most supplement brands to add additional ingredients into their mass builders to further enhance their effects on weight and muscle gain. These include:

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