Apple cider vinegar (ACV) has become a favorite natural remedy in hair care, celebrated for its gentle cleansing and balancing properties. Rich in acetic acid and packed with vitamins B and C, it helps remove excess oil, residue, and bacteria from the scalp while restoring its natural pH balance. By doing so, ACV can ease dandruff, calm itchiness, and create a healthier foundation for stronger, shinier hair. Many people have begun exploring overnight treatments to deepen these effects — though this approach requires care and proper preparation.

In one personal trial, raw, unfiltered apple cider vinegar was diluted with an equal amount of water to minimize irritation. After a quick patch test, the mixture was lightly sprayed onto the scalp and massaged in to stimulate circulation. The hair was covered with a shower cap and wrapped in a towel to prevent drips while sleeping. By morning, the hair felt softer, less frizzy, and more manageable — though it carried a faint vinegar scent that faded after washing.

Once rinsed and shampooed, the difference was striking. The hair felt cleaner and lighter, as if built-up residue had been lifted away. The scalp appeared calmer, with reduced itching and dryness, and strands looked noticeably smoother and shinier. While leaving ACV on overnight doesn’t directly accelerate hair growth, a well-balanced and clarified scalp provides a healthier environment that supports stronger hair over time.

That said, moderation and dilution are key. Because ACV is naturally acidic, using it undiluted or too often can cause dryness or irritation, particularly for sensitive scalps. It’s best used occasionally — followed by a nourishing conditioner or hair mask to restore moisture. Though it may not replace professional treatments, apple cider vinegar remains an affordable, natural way to refresh the scalp, enhance shine, and bring dull hair back to life with gentle consistency and care.