What it is
Apple cider vinegar is mildly acidic and often used as a diluted rinse to balance scalp pH and remove buildup.
💇‍♀️ What it can do for your hair
Used properly (diluted and rinsed out), it may:
- Add shine by smoothing the hair cuticle
- Remove product buildup and excess oil
- Help with mild dandruff or itchiness
- Improve scalp cleanliness
⚠️ What happens if you leave it overnight
- Can dry out hair (acid exposure too long)
- May irritate or burn sensitive scalp
- Strong smell can linger
- Doesn’t significantly improve results compared to short use
So the “overnight miracle” idea is mostly exaggerated.
âś… Safe way to use it
- Mix 1–2 tablespoons ACV in 1 cup water
- Apply after shampoo
- Leave for 2–5 minutes only
- Rinse thoroughly
Use 1–2 times per week at most.
đźš« Who should avoid it
- People with sensitive or damaged scalp
- Very dry or brittle hair
- Open cuts or irritation
🟢 Bottom line
Apple cider vinegar can be helpful as a short rinse, but leaving it overnight isn’t safer or more effective—and can actually backfire