My go-to recommendation is a whey protein isolate because of how rapidly it's digested and absorbed, which is important for post workout. Whey concentrate is another option but this powder tends to be higher in carbohydrates and fat than isolate. The key to picking a good protein powder is making sure it's third party tested since supplements aren't regulated at all by the Food and Drug Adminstration. I always look for the u003ca href=u0022https://www.nsfsport.com/u0022u003eNSF for Sport certificationu003c/au003e!