A sluggish liver can cause a number of health problems, and bad breath may be an indication of impaired liver function for some people. Pinpointing the symptoms can be the first step to eliminating bad breath and repairing the liver.

Bad Breath

Bad breath can be a sign of sluggish liver because the liver is responsible for breaking down fat in the body and extracting harmful substances from the blood. When the body is not able to metabolize fat and there are impurities in the blood, this can increase bacteria in the mouth, which produces foul odor.

Coated Tongue

A coated tongue, especially first thing in the morning, is a sign that the liver is not functioning properly, and can cause bad breath. ‘Morning breath,’ or bad breath after just waking up, could also be a sign of a damaged liver.

Dietary Changes

To treat bad breath caused by a sluggish liver, including more fresh fruits and vegetables into the diet may be helpful. The liver can become overworked due to an excess of processed foods, alcohol and sugar, so natural sources of fiber and sugar can correct this problem.


Some people may benefit from staying away from caffeine and animal fat in order to clean the liver and freshen the breath. Since the liver is responsible for processing fat, giving it a break will allow it to strengthen and properly rid the body of substances that cause bad breath.


Green herbs that cleanse the liver can also provide fresh breath. Chewing a few sprigs of parsley after a meal may be helpful, and adding a few mint leaves can leave the mouth clean by removing bacteria.