The safest method is dilution, starting small, and continuing only if well tolerated. Mix vinegar into a glass of water rather than drinking it straight to reduce throat and esophageal irritation. To protect enamel, consider using a straw, rinse your mouth with water afterward, and avoid brushing immediately. If you have reflux or gastritis, using it around meals can be safer than on an empty stomach. Most important: vinegar is not a miracle treatment. If it worsens symptoms, stop.