Apple cider vinegar has become a popular natural option for people looking to improve their hair without relying on complicated beauty products. When properly diluted, its mild acidity may help support the scalp’s natural pH balance, especially when shampoo, styling products, and environmental exposure have disrupted it. This can help smooth the hair cuticle, making strands appear softer and shinier.

Another reason people turn to ACV is scalp care. Buildup and mild irritation can contribute to dandruff, itchiness, and dull-looking hair. As a gentle clarifier, diluted ACV may help loosen residue and leave the scalp feeling cleaner. Some people even incorporate it into an overnight routine, hoping that extended contact will give the treatment more time to work. But there is an important question: is leaving ACV on your hair overnight actually the best approach?