Apple cider vinegar is made through a fermentation process from apples, as its name suggests. This results in probiotic, antioxidant, and anti-diabetic properties. The main ingredient in ACV is acetic acid, which is responsible for the majority of its health benefits, which are seemingly endless. It has been shown to help boost the immune system to fight off colds and sore throats. It has also been shown to benefit the digestive system and remove toxins from the body. Furthermore, ACV may lower blood pressure and potassium levels as well.
The problem is, many people choose to drink apple cider vinegar straight like a shot of whiskey. While this doesn't negate any of the positive effects of ACV, it can cause some harmful results. As stated above, it is mostly made of acetic acid, and this can damage your tooth enamel, especially if you drink apple cider vinegar on a daily basis. You may think you can negate this effect by brushing your teeth right after drinking ACV, but in actuality, this makes it even more harmful to your teeth, because it scrubs the acid around your enamel with your toothbrush.
In addition to harming your teeth, the acidity of apple cider vinegar can cause damage to the soft tissue in your mouth, your throat, and your stomach. This is why you will often see suggestions to drink apple cider vinegar diluted in a glass of water or as a part of a salad dressing or other recipe. But the fact is, even diluted in these ways, ACV can cause damage over a long period of time.