If you are looking to gain weight or build lean muscle, a mass gainer can provide the macronutrients and calories needed to maintain the surplus. The best mass gainer is not the one with the highest calories or protein for that matter, but a great combination of macronutrients with additions of easy mix-ability, justified price, and high-quality ingredients. This article is going to be an extensive list of some of the best mass gainers that you can invest in for your body. n this video, I will show you details about Russian bear and muscle pharma combatXL. So that will be easy for you to compare both products and decide which one is best for you. #Russianbear10000 #combatxl #reviewbySABEEH Facebook / sabeeh.gymit Instagram / muhammadsabeehehsan