O2 Scalp and Hair Vinegar

A mildly acidic scalp and hair vinegar rinse that cares for both at once

Unlike regular conditioners or treatments that only coat the hair surface, this water-type hair vinegar cares for your scalp as well. Its pH 3.5–4.5 mildly acidic formula helps restore balance to a disrupted scalp environment, while naturally fermented vinegar penetrates along the hair shaft to leave strands soft and glossy. Silicone-free, so it won't cause breakouts even when it touches your scalp.

Dermatologist-tested. Suitable for sensitive skin.

In a human application test conducted by the Korea Bio Clinical Research Center, the product received a 'no irritancy' rating with an average skin reaction score of 0.00. Patch-tested on 22 adult men and women aged 20–60, it's safe even for sensitive scalps.

Key ingredients for scalp soothing and hair shine

• Yuzu Extract: Helps calm scalp inflammation with anti-inflammatory properties and supports pH balance normalization
• Oxygenated Water (Mineral Water): Removes buildup and impurities from scalp pores while delivering hydration
• Centella Asiatica Extract: Soothes scalps sensitized by external stressors and helps strengthen the skin barrier
• Soybean Seed Powder: Smooths damaged cuticles to help achieve glossy, polished hair

Also formulated with plant-derived oils like camellia seed oil and jojoba seed oil, plus protein ingredients such as keratin amino acids and hydrolyzed collagen to help improve hair strength. Recommended for those whose scalp gets greasy or develops odor by midday, those with hair damage from frequent styling, or anyone who's experienced scalp breakouts after using traditional treatments. Finished with a yuzu-based scent for a fresh, uplifting feel after every use.

A scalp and hair care step that replaces conditioner after shampooing

O2 Scalp and Hair Vinegar is a water-type formula that can be used directly on the scalp, unlike typical conditioners or treatments. After cleansing with shampoo, use this product in place of your conditioner to soothe the scalp and boost hair shine in one step.

Use every evening after shampooing

For best results, apply after shampooing away the day's buildup of styling products and sebum. While you can also use it after morning showers, incorporating it into your evening routine consistently helps maintain a balanced scalp.

Apply evenly to scalp and hair

After shampooing, gently squeeze out excess water. Dispense an appropriate amount and apply it first across the entire scalp. Massage gently with your fingertips, then work the remaining product through mid-lengths to ends. Leave on for 2 to 3 minutes, then rinse thoroughly with lukewarm water.

How to use it for specific scalp concerns

• If you're dealing with odor or oiliness at the crown, focus your massage on the T-zone area of the scalp
• If frequent coloring or heat styling has left your hair dry and brittle, apply generously to the ends to replenish moisture
• If you've experienced scalp irritation from traditional conditioners, try switching to this product

Storage and usage notes

The yellow tint comes naturally from yuzu extract, so you can use it with confidence. The silicone-free formula won't clog pores even when applied to the scalp. Store in a cool place away from direct sunlight, and discontinue use if you experience any irritation or discomfort on the scalp.

Water, Butylene Glycol, Vinegar, Citrus Junos Fruit Extract, Mineral Water, Panthenol, Ricinus Communis (Castor) Seed Oil, Centella Asiatica Extract, Aloe Barbadensis Leaf Extract, Caprylic/Capric Triglyceride, Camellia Japonica Seed Oil, Camellia Sinensis Seed Oil, Fagopyrum Esculentum (Buckwheat) Extract, Niacinamide, Glycyrrhiza Glabra (Licorice) Root Extract, Hydrolyzed Wheat Protein, Simmondsia Chinensis (Jojoba) Seed Oil, Keratin Amino Acids, Hydrolyzed Elastin, Hydrolyzed Collagen, Glycine Soja (Soybean) Seed Powder, Salvia Sclarea Extract, Lavandula Angustifolia (Lavender) Flower Extract, Chamomilla Recutita Flower Extract, Borago Officinalis Extract, Centaurea Cyanus Flower Extract, Hyacinthus Orientalis Extract, Tocopherol, Folic Acid, Riboflavin, Camellia Japonica Seed Extract, Menadione, Camellia Japonica Flower Extract, Cyanocobalamin, Biotin, Ascorbic Acid, Bioflavonoids, Pyridoxine, Thiamine HCl, Cetrimonium Chloride, Fragrance, Citric Acid, Sodium Citrate, 1,2-Hexanediol, Caprylyl Glycol, Ethylhexylglycerin, Citral, Limonene, Linalool

The list of ingredients is subject to change. Please consult the packaging of the product purchased.