Apple cider vinegar, commonly referrede to as ACV, has been a multipurpose folk remedy for as long as I can remember. Growing up, it was the go to solution for almost everything. Have a weird skin issue? Rub a little ACV on it.

Digestive troubles? Take a teaspoon. Trying to lose weight or keep blood sugar stable? A tablespoon before meals was the standard advice. I even knew people who used ACV as a natural household cleaner, and it does work well in that regard if you don't mind the distinctive scent.

It was one of those “if all else fails, try this thing” remedies — and honestly, it worked more often than not.  But one of the most overlooked uses for apple cider vinegar is its ability to improve hair and scalp health. It’s inexpensive, easy to use, and surprisingly effective when incorporated into a haircare routine.

Whether you deal with dull hair, product buildup, dandruff, or an oily scalp, ACV can help restore balance and vitality. Below are the key ways ACV supports healthier hair and a cleaner, calmer scalp — expanded so you can see exactly why this simple remedy works so well.

“How does apple cider vinegar make hair shiny?”

ACV is naturally acidic, which helps tighten and smooth the hair’s cuticle - the outer layer of each strand. When the cuticle lies flatter, hair reflects light better, resulting in:
• smoother texture
• less frizz
• more shine
• better manageability

If your hair looks dull or frizzy, especially in humidity, an ACV rinse can instantly improve its appearance.

Related: Vinegar Rinse Benefits for Hair and Scalp

ACV Removes Styling Product Buildup Naturally

Over time, conditioners, serums, dry shampoos, and styling products leave residue on the hair shaft. This buildup can make hair feel heavy, greasy, or coated, and it can prevent your conditioner from absorbing properly.

ACV acts as a gentle clarifying rinse, helping:
• dissolve residue
• remove silicones
• clear away dry shampoo buildup
• reset the hair so products work better

Unlike harsh clarifying shampoos, ACV doesn’t strip the hair. It simply creates a clean slate.

ACV Helps Remove Excess Sebum From the Scalp

If you struggle with an oily scalp or feel like your roots get greasy too quickly, ACV can help balance things out. Its mild acidity helps break down excess sebum without over drying the scalp.

This is especially helpful for:
• oily hair types
• people who wash infrequently
• those who use heavy styling products
• anyone dealing with scalp congestion

A balanced scalp often leads to fewer breakouts along the hairline and less itchiness.

ACV May Help Improve Dandruff

Dandruff often stems from a combination of excess oil, yeast overgrowth, and irritation. ACV’s natural acidity helps restore the scalp’s pH, making it less hospitable to the yeast that contributes to flakes.
Regular ACV rinses may help:
• reduce visible flakes
• calm irritation
• minimize itchiness
• support a healthier scalp environment

It’s not a cure all, but many people see noticeable improvement.

Related: ​Apple Cider Vinegar for Shiny, Healthy Hair (and Scalp)

ACV Has Natural Antifungal Properties

One of the lesser known benefits of ACV is its antifungal potential. This can indirectly improve scalp health by reducing the fungal activity associated with dandruff and itchy scalp conditions.
If you deal with:
• fungal folliculitis
• seborrheic dermatitis
• chronic itchiness

ACV may help calm symptoms and support a cleaner, healthier scalp.

ACV Provides a “Squeaky Clean” Feel Without Harsh Detergents

Many people love the way ACV makes their hair feel - clean, fresh, and lightweight. It removes buildup and excess oil without stripping the hair’s natural moisture barrier, making it ideal for:
• fine hair
• oily hair
• dull or coated hair
• anyone wanting a natural clarifying rinse

It’s one of the simplest ways to refresh your hair between washes.

Looking for more information about scalp health and hair biology?  See Scalp Health and Hair Biology