This has always been an area of sensitivity for me. It's taken me a long time to know what foods work for me and which ones don't and to understand the fluctuations in my body that can occur and when I need to put something in or take something out of my diet, to help boost things up.
Our gut is our second brain. So many health issues can be helped with proper nourishment of this important system.
This article explains things really concisely and has been a great resource for me.