In nature, the flight-or-fight response is all too common. A zebra being chased by a lion uses this response to run for its life. It needs all of its energy to outrun the lion. In fight-or-flight mode, the zebra’s body down-regulates certain other systemic functions, such as wound healing and digestion. However, this is a quick switch that does not last long. As soon as the danger has passed, the zebra’s body returns to normal function. We humans often live as though a lion is constantly chasing us, and this puts tremendous pressure on our digestive system. Simply put, your gut is grouchy because of all that stress. If you want to tame your gut, learn to manage your stress the best you can. You can also add a digestive enzyme to your diet, such as Upzymes. Upzymes will help you digest your food and absorb its nutrients more efficiently, so that your gut will be less grouchy.

—Dr. Joshua Levitt