Apolipoprotein a1 is low. What's going on?

Apolipoprotein a1 has the function of transporting and metabolizing fat. A little low value is likely to be caused by unreasonable diet structure, lack of exercise and other physiological factors, and will generally recover by itself; this situation also needs to be considered as caused by diseases such as cirrhosis, hepatitis B, fatty liver and alcoholic hepatitis.