Taking apple cider vinegar in moderation is generally not damaging to the liver. Apple cider vinegar is a drink formed by fermenting apple juice into high-purity apple cider, then accessing acetic acid bacterial strains for secondary fermentation, and mixing it with apple juice and other raw materials after metabolizing alcohol into acetic acid. Apple cider vinegar, as a food, is rich in vitamin C, calcium, phosphorus, zinc, potassium, pectin, aspartic acid, serine, tryptophan and other nutrients. It can replenish nutrients, promote metabolism and gastrointestinal peristalsis, which is helpful for improving immunity, eliminating fatigue and relieving constipation, and generally does not damage the liver. Although apple cider vinegar as a kind of food has many benefits, it is not suitable for all people to take, especially those who are easy to be allergic to it, and overdose of it may lead to diarrhea, abdominal pain and other adverse reactions. So drink and control the dosage according to your own situation.