Apple cider vinegar (ACV) has long been celebrated for its natural cleansing and balancing properties, especially in hair care. Rich in acetic acid and vitamins B and C, it helps remove excess oil, product buildup, and bacteria from the scalp. By restoring the scalp’s natural pH balance, ACV can reduce dandruff, soothe itchiness, and create a healthier foundation for hair growth. Because of these benefits, many people try leaving diluted ACV on their hair overnight to deepen its effects.
In one popular method, raw, unfiltered ACV is mixed with water in equal parts to minimize irritation. After a patch test, the mixture is applied using a spray bottle and gently massaged into the scalp to boost circulation. The hair is then covered with a shower cap and towel to prevent leaks during sleep. By morning, even before rinsing, the hair feels softer, less frizzy, and slightly shinier — though a light vinegar scent may linger.
After washing and conditioning, results become more noticeable. Hair feels lighter, cleaner, and smoother, showing that ACV effectively clarifies the scalp and seals the cuticles. Many users also report less itchiness and a healthier overall texture. While ACV doesn’t directly cause new hair growth, maintaining a clean, balanced scalp can encourage stronger, healthier hair over time.
Still, caution is key. Because ACV is acidic, it should always be diluted and used sparingly — especially on sensitive scalps. Overuse can lead to dryness or irritation, so it’s best to limit treatments to once every week or two and follow up with a nourishing conditioner. Though it doesn’t replace traditional hair care products, apple cider vinegar remains a natural, affordable way to detoxify the scalp, restore shine, and improve overall hair vitality.