You should start with lower doses and test your capacity by slowly increasing it. Even if it suits you, do not take more than 2 tbsp or 30 ml in a day. Dilute the vinegar in water or any other beverage before drinking it. Rinse your mouth thoroughly after drinking apple cider vinegar. Consult your doctor to determine if it could interfere with existing medication or lead to an allergic reaction. If you notice any problem after taking apple cider vinegar or its supplements, stop immediately and seek medical advice.