My question is: If I wash my hair with lemon water, could that promote hair growth? That would be on a daily basis.
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Although I love to drink lemon water on a daily basis, on your hair its generally used as a clarifying rinse for blondes. (Apple cider vinegar rinses are best suited for dark hair.) Its great to do this once a month or occasionally, but clarifiers remove natural oils from your hair as well as removing product build up. When you remove too many natural oils, your hair can become dry and brittle.