Stark Pharm's Flex GCM formula...
Gainer is a dietary supplement containing mainly high-quality protein (protein) and carbohydrates, due to which it has a high anabolic effect.
The food supplement ActivLab - Mass Up is high-carbohydrate, which means that its use is guaranteed to help ectomorphs gain weight due to muscle mass.
Maxler Mega Gainer is a reduced whey protein carbohydrate blend designed to provide energy support to the body before and during exercise.