You should only drink 1/2 to 1 tablespoon of diluted apple cider vinegar, otherwise it can cause nausea, worsen acid reflux and cause tooth enamel erosion.
You should also drink apple cider vinegar in a straw to reduce the amount of acid exposed to to tooth enamel.
If you are an unlikely person to regularly consume vinegar, start with a small dose first to see how your stomach reacts to vinegar, then gradually increase it.
The main ingredient of vinegar is acetic acid, so it can take the body a while to get used to it. You can try a little cinnamon, honey, ginger or lemon juice to make the flavor more pleasant.
If you don't want to drink apple cider vinegar directly, you can also try adding it to salads or use it as a marinade.
Apple cider vinegar helps slow down the emptying of the stomach, helping you feel full longer. You can take it before or during meals, or take it 30 minutes before bed to help stabilize blood sugar levels in the morning.
The most important thing you need to do before trying to use apple cider vinegar to reduce visceral fat is to talk to your doctor to ensure it can be used safely.