One of the questions im asked most in the gym!! In my 15 years of Bodybuilding I have found them all to be very much alike. Some of the American brands are hype and splash across the front of the tubs '100% Whey!!!!!' and show pics of Pro Bodybuilders. To be honest I have made good gains with Holland & Barretts own whey protien. At the mo' im using USN Protien which claims to give 36g's of protien per serving. Im having 3 shakes a day with my diet and gains are good...... im using other stuff aswell though!!