What causes low levels of alt?

Low levels of alanine aminotransferase (ALT) can be caused by a variety of factors, including certain genetic conditions, vitamin B6 deficiency, and low protein intake. Additionally, some medications and lifestyle factors, such as a sedentary lifestyle or excessive alcohol consumption, can also contribute to decreased ALT levels. Generally, low ALT levels are not considered a major health concern, but they may indicate underlying health issues that should be evaluated by a healthcare professional.