For several weeks earlier this summer, I craved bananas like crazy. I HAD to have several bananas every day and I honestly don't really like them. Turns out my body was telling me I was low on potassium. Would you believe that your body give you subtle cues when your're not getting enough protein? Some of the warning signs are sugar or candy cravings or even being tired or shaky. Check out the 15 subtle signs that you need protein.