ACV actually helps the body to become more alkaline unless your doing a ton of it then it's acidic. A few people will also have allergic reactions. There is a theory that is promotes candida but in my experience it did not. In fact lots of people take it to help with candida. I felt really good on it and switched Kombucha for a long time. ACV helped balance my hormones. The only reason I stopped if that I have found fermented foods are giving me inflammation, specifically under eye bags.