Mutant Extreme Mass is quite well formulated for a gainer, with different matrix for each macro-nutrient (proteins, carbohydrates, lipids)
Carbohydrates: a mixture of carbohydrates with a high, even very high glycemic index (GI) (maltodextrin GI 95, waxy corn starch (Waxy maize, GI 100), and moderate or even low (sweet potatoes, oats, 46 and 60 respectively), barley starch (whose GI depends on the level of amylose, barley having a GI of 25).
Protein: contains a "3 phase" blend of protein with whey protein concentrate (whey), whey protein isolate, and hydrolyzed whey protein, thus having all the spectrum of assimilation.
Lipids: Very good quality mixture: fractionated coconut oil rich in medium chain triglycerides (MCT), avocado powder and pumpkin.
The formula of MUTANT MASS XXXTREME 2500™ is supported by enzymes that promote digestion (lipase, protease), and insulin regulators (patented cinnamon extract Cinnulin PF ®, and tart cherry extract)
The mass gainer can sometimes be a last resort when you can't eat more and you can't progress, or when you don't have enough time to eat several meals a day .
Add to this 5g of post-workout creatine and you have an extremely anabolic post-workout meal.