During an anatomy lecture I heard of the importance of the acidity of gastric acid (e.g., killing microorganisms, dissolving food, being a factor for triggering further processes). If a healthy person would eat a tsp. of Magnesia [Mg(OH)2] suspension before a meal (lets say at least 30 min beforehand) and then eat normally, would it have a significant impact on the digestion? Like being unable to extract or produce certain products? Or having a higher risk for a yeast infection?
This question also applies to proton channel inhibitors such as Omeprazole and other drugs like Ranitidine
(Background: The lecture was just a introduction to anatomy for informatics. We never went into greater details.)