whey protein if u have enough money to buy 3 kilos mnamn which is 11k akababi ,1kg bzu aytekmm. BUT i would say creatine all the way,it is kind of cheap relatively and can be use full. Maybe 3k to 3.5k bihon new birrum. its can be both pre and post workout shake. It gives you endurance,strength and gains,you will not regret it🙏 Sincerely ThatDude