Whey protein shake is nowaday the best product to gain weight or lose weight. If you guy heard of Genetically modified organism(GMO). 90% of the soy are went thru GMO nowadays which will cause death to human being...Most of the product nowadays are still using soy protein for people to gain weight or lose weight...which is very dangerous...& of course not every whey protein shake are from new zealand Happy Cow....you can go google this - "Isalean Shake – The Best Meal Replacement For Weight Loss". This is one of the whey protein shake I use to lose weight & it being certified^^