system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is protein powder made?
gpt
Depends what type of protein powder it is.  For some, like whey, it's simply the liquid whey left over from cheese making that has been filtered to remove the sugar and fats, and then dehydrated.  Then they can season it with various flavorings to make it more appealing.