Question: how often to use apple cider vinegar for dandruff?
Answer: Start with a low concentration of apple cider vinegar. This might be 1–2 tbsp per 8 fluid ounces (0.24 liters) of water once or twice a week. People can gradually increase the amount up to 5 tbsp of apple cider vinegar. Anyone who experiences signs of scalp irritation or worsening dandruff should discontinue use.