First, let me explain ACV. ACV stands for Apple Cider Vinegar — it’s a vinegar made from fermented apple juice. ACV is reported to have a range of potential benefits, and while vinegar has been used for centuries, ACV really took off around 2017. Much of its reported benefits, such as for weight loss or to manage blood glucose levels, are not backed by a lot of research (note the Healthline article I link to above just says it may aid weight loss, may help lower blood sugar levels etc). But there’s enough going for ACV that many people take it, and in the years since it’s become popular, many people report to have gained all kinds of health benefits from it.