Unflavoured whey protein isolate isn't hugely popular but you can get it online. US: https://nutricost.com/collections/protein/products/nutricost-whey-protein-

Unflavoured whey protein isolate isn't hugely popular but you can get it online. US: https://nutricost.com/collections/protein/products/nutricost-whey-protein-isolate-powder-5-lbs https://nutricost.com/collections/protein/products/nutricost... AU: https://www.bulknutrients.com.au/products/whey-protein-isolate https://www.bulknutrients.com.au/products/whey-protein-isola... edit - I should add, you can get a bit of an idea of the quality of the protein powder by just looking at the percentage of protein in it. Nutricost is 85% and Bulk Nutrients is 87%. Doesn't leave much room to shove other ingredients in with protein levels that high. You can also go buy 20kg bags of WPI from NZ (which is where I think most of these retail products get their WPI from) https://www.nzmp.com/global/en/products/ingredients/types/proteins/whey-protein-isolates/nzmp-sureprotein-wpi-895.html https://www.nzmp.com/global/en/products/ingredients/types/pr...