There are several causes of decreased eGFR. Considering that you have no obvious health problem, there is probably nothing much to worry about. However, it might be advisable to get a urine examination done. Also, a radionuclide
test for kidney function maybe considered in consultation with your treating physician.
There have been several studies linking heavy alcohol consumption to chronic kidney disease
. However, the exact mechanism by which these are related is not definitely known. However, it is probably advisable that you moderate your alcohol intake, not only to protect your kidneys but to avoid other health hazards related to alcohol consumption (liver
problems, heart disease