Low stomach acid leads impairs the body's ability to absorb vital nutrients and this will affect your health. You also need stomach acid to kill off bacteria, fungi and parasites. Nutrients that are malabsorbed due to insufficient/lowered stomach acid include: calcium, vitamin B12, iron, magnesium, selenium, zinc, folic acid, vitamin A, vitamin B1, vitamin B2, vitamin B6 and vitamin E.
Nexium is a short term drug only.