Mass gainer supplements usually come in powder form and are mixed with water or milk to make a shake. They typically contain a higher calorie content than regular protein powders and usually have a higher carbohydrate content to provide the energy needed for muscle growth. The protein content is also high, it can come from various sources such as whey, casein, soy, pea, hemp, etc.
https://www.cprarticles.com/ca....tegory/health/38668-
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