A lot of people coming to Keto have some underlying digestive issues which ACV can help with. in my case I have low stomach acid and the ACV helps my body digest my meals (esp salads) much more quickly, and has completely eliminated the bloating and reflux I’ve suffered from for so many years. (Paradoxically, a lot of reflux is caused by low acid, as acid signals the esophageal flap to close). I drink a TBSP in a glass of water before meals. At first it was so gross, but after a couple of weeks I got to where I really don’t mind it at all.
An added plus is I’m sleeping better because I can sleep on either side without waking up choking on acid! Imagine only being able to sleep in one position for 20 years! All fixed thanks to the advice I got about ACV and digestion.