Mass Gainer are a dietary supplement that contains a high amount of calories per serving and usually contains the three groups of macronutrients (Carbohydrates, Lipids and Proteins), their composition may vary depending on the brand.
One scoop of weight gainer can contain approximately:
Protein: 24 – 30 gr
Carbohydrates: 95 - 125 gr
Lipids: 3 - 8 gr
It is usually recommended when it is not practical to eat or access food or when the requirement according to the goal is high in energy.