1. Whey Protein
Derived from whey which is the watery portion of milk that separates from the curds when making cheese (think: curds and whey). Due to its high protein content, and ability to be absorbed quickly by the muscles, bodybuilders use it to bulk of fast.
To maximize its effectiveness, experts say to take whey protein post-workout to help repair potential muscle damage, as well in the morning to ensure a rapid intake of protein to restore the drop in nitrogen levels after fasting through the night. Keep in mind that the effectiveness is not a one-and-done thing. Results will show after continued use during workout cycles.