Excessive use of apple cider vinegar for hair can lead to dryness and an itchy scalp due to its acidic nature.
For this reason, we suggest using our Vinegar Rinse once each fifteen days.
You may run a patch test first and see how it works for you. If it shows no reactions, using it once a week or once in two weeks is a good frequency.
You may of course use it as often as you like too.