Apple cider vinegar has long been touted as a cure-all for anything from arthritis and asthma to ulcers and urinary tract infections. Most benefits are anecdotal at best, but a little apple cider vinegar now and then shouldn’t hurt. Too much, however, can sometimes cause problems. The acid in apple cider vinegar can pose problems for your throat and teeth, while other components can adversely affect your blood sugar and potassium levels. As with any form of complementary or alternative medicine, talk to your doctor before taking apple cider vinegar to treat a medical condition.
People taking certain medication – namely insulin and diuretics – should take care when drinking apple cider vinegar. Zeratsky warns that apple cider vinegar can adversely interact with your prescription and lead to low potassium levels. Low potassium, medically referred to as hypokalemia, can cause constipation, weakness, muscle cramps and even abnormal heart rhythms. The body uses potassium to maintain proper functioning of the nerves and muscles. Without it, problems occur.