Rsp nutrition truegain is the premium lean weight gainer. Powered with a massive dose of 1,210 calories per serving and 50 g of fast and slow absorbing proteins, truegain is the ideal solution to fuel muscle growth, support quality weight gain and maximize recovery.It includes a 50g blend of fast and slow release proteins: Whey protein isolate, whey protein concentrate and milk protein concentrate. Truegain helps build muscle and add size with 1,210 calories of effective carbs and protein. Additionally, it delivers potent dosages of essential amino acids, with 10g of naturally occurring bcaas, and 8g of naturally occurring glutamine and glutamic acid.