Our digestion can suffer if our stomach is not working optimally. Our digestive system can suffer a lot of abuse during our lifetime. Think about it, from morning till night, we put into our mouths whatever is in our arm’s reach: foods, liquids, stimulants, relaxants, and chemicals.
We expect our system to somehow magically grind it all up, sort it out, use the good, eliminate the bad, all without any noise or complaint, and still have lots of energy. That the human system can withstand the abuse it does has to be one of the miracles of life. The apparent stamina of the digestive system is illusory.