The key safety rule is to always dilute vinegar with water. In practice, many people start with a small amount in a standard glass (about 200–250 ml) and adjust only if well tolerated. The most common mistake is making the mix too strong or drinking vinegar straight, which can irritate the esophagus, worsen reflux, and contribute to enamel erosion. Start low, monitor tolerance, and watch for burning, nausea, or throat irritation. If symptoms occur, reduce the amount or stop. Safety and consistency matter more than “stronger” mixtures.