Betaine hydrochloride is also used to treat abnormally low levels of potassium (hypokalemia), hay fever, “tired blood” (anemia), asthma, “hardening of the arteries” (atherosclerosis), yeast infections, diarrhea, food allergies , gallstones, inner ear infections, Rheumatoid Arthritis (RA), and thyroid disorders. It is also used to protect the liver.