The body’s blood pH is between 7.35 and 7.45. The body has homeostatic regulatory mechanisms to keep it within this range or otherwise death would result. Food when eaten and absorbed can influence the body’s blood pH and affect health. Healthy foods are called alkaline foods because when absorbed they produce a pH towards 7.45. Conversely unhealthy foods are acid foods from an acid diet which produces a pH towards the lower 7.35 end.
In other words frequent or heavy long-term consumption of acid foods may lead to illness and ultimately death.