How to lose weight but gain muscle and which protein to use?

Here you can find some information in our blog about building muscle: http://blog.nkdnutrition.com/the-best-protein-powder-for-muscle-gain-2/

Here is an article why we think grass-fed whey is the best: http://blog.nkdnutrition.com/grass-fed-whey-protein-advantages-2/

In short, we recommend whey protein provided you have no issues with lactose.