Acidosis is too much acid in the blood and body, a distinctly abnormal condition that is the result of the accumulation of acid or the depletion of alkaline reserves. One prominent example is diabetic ketoacidosis. Acidosis also occurs in lung disease, and severe kidney disease. In the extreme form acidosis is a prelude to death. Milder forms are seen with poor diet, smoking, extreme exercise, no exercise, etc. Also, unrecognized chronic infections produce acid and result in a condition of chronic subclinical acidosis which probably ages the body prematurely. Common causes are dental infections and gut wall inflammatory conditions. The opposite of acidosis is alkalosis in which there is too high a pH due to excess base or insufficient acid in the body.