The commonest cause of elevated ALT is nonalcoholic fatty liver disease which is common in people who are obese, in diabetics and those with hypercholesterolemia. Folic acid deficiency can cause diarrhea, loss of appetite, weight loss, weakness, headaches, a sore tongue, heart palpitations, irritability and memory problems and increased risk of cardiovascular disease. There are few studies which do say that folic acid deficiency can give rise to raised ALT.It is important to evaluate a person and all symptoms, sign, physical exam, medical history, results of other tests, etc before arriving at any diagnosis and starting treatment. Do consult your doctor before starting folic acid. At the meantime you may try reducing weight if you are overweight. Adopt lifestyle changes like include exercise in your daily regime and avoid fried fatty foods. Follow up with your doctor regarding repeat ALT testing. Write to me again.
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