Caffeine may cause acid reflux, stomach ache, bloating and gas in those of blood type O. Additionally, caffeine increases the risk of heart disease as well as raising blood sugar levels – not ideal conditions for this blood type. But don’t despair; coffee can still be part of your daily diet by selecting an appropriate option.

Low acid coffee can be an ideal way to cut back on acid levels in your cup, and research shows it has numerous health advantages beyond soothing stomach irritation and making your morning cup taste better.

The optimal low acid coffee will use high-grade beans roasted slowly so as to maintain an ideal pH (lower pH = more acidic). Furthermore, this coffee should contain chlorogenic and quinic acids produced during roasting which add flavor.