Unless you've been living under a rock, you've heard about whey protein already. It's probably one of the biggest selling sources of protein on the market today and with good reason. Whey protein has a high biological value, meaning that it's one of those sources of protein, much like egg protein, where your body's going to be able to digest, assimilate, and utilize pretty much most of it.
Whey protein itself is a byproduct of cow's milk and cheese, and so sometimes those who are lactose intolerant, they're a little bit leery about trying whey, because they're afraid of what it's going to do to them. Some of the other forms of the isolates in the whey proteins are of such a high quality that even those that are lactose intolerant tolerate whey protein pretty well. You might want to give it a shot before you toss it as an option for you.
A whey protein powder is a great way to get protein into your system. A pre-workout, post-workout, even during your workout, something I call whey protein whey glutamine BCAA washes. I actually have my clients mixing whey protein, not too much, just a little bit, not even a whole scoop, mixing with some BCAAs branched-chain amino acids and some glutamine, and then literally almost giving themselves an intravenous drip, or what I call a drip phase of just drinking that protein throughout the workout so that they're loading their muscles with the necessary protein that they need.
Whey protein is absolutely indispensable for your muscle program.