Kose Stephen Knoll Deep & Renew Booster Oil - Intense Hair Repair

5. Who is this for?

1. The Curly-Haired Naturalist Who Wants Definition Without Damage

You embrace your natural texture but struggle with dryness and frizz from heat styling or chemical treatments, seeking a nourishing oil that repairs without weighing down your curls.

2. The Color-Treated Perfectionist Who Wants Vibrancy & Strength

You invest significant time and money in salon color and want to protect that investment with a product that deeply repairs damage, locks in moisture, and prevents fading from the inside out.

3. The Frequent Styler Who Wants Rescue From Heat Damage

Your daily routine relies on blow-dryers, straighteners, or curling irons, and you need a powerful reparative treatment to combat the resulting brittleness, split ends, and lack of shine.

4. The J-Beauty Enthusiast Who Wants Proven Innovation

You trust Japanese skincare science for its efficacy and gentle formulations and are now seeking that same sophisticated, results-oriented approach for your haircare regimen.

5. The Mature Hair Caretaker Who Wants To Restore Youthful Resilience

You've noticed your hair becoming thinner, drier, or more fragile with age and are looking for an intensive treatment to restore strength, elasticity, and a healthy-looking luster.

Hair That Feels Stronger, Not Just Coated

The 7-oil complex works inside the hair shaft to rebuild broken bonds, so your hair resists snapping and split ends. Users say, 'My hair doesn't break off when I brush it anymore.'

Tames Frizz Without the Greasy Feel

The fast-absorbing formula smooths the hair cuticle for a sleek look. It's 'not heavy or oily at all' and leaves hair 'soft and shiny, not weighed down.'

Seals Split Ends So Your Hair Looks Longer

The repairing oils bind to damaged ends, temporarily fusing splits so your hair appears smoother and your style holds its shape longer between cuts.

Protects Your Style From Daily Heat Damage

Acts as a shield against your tools. One user noted, 'I use my flat iron every day, and my ends are still healthy-looking.'

Makes Wet Hair Tangle-Free in Seconds

Smooths the cuticle so your comb glides through. People love that it 'makes detangling after a shower so much easier and causes less pull.'

Adds a 'Just-From-The-Salon' Shine

Reflects light off a smooth, healthy cuticle for luminous shine. Reviews often mention the 'incredible shine' and 'healthy glow' it provides.

Saves Time on Blow-Drying and Styling

Hair dries faster and styles more easily because it's smoother. Users report it 'cuts my blow-dry time' and hair 'stays smooth all day.'

Revives Dry, Stressed Hair From the Inside

Nourishes hair parched by coloring, sun, or hard water. The result is hair that 'feels hydrated and bouncy again' and 'looks alive.'

1. **7-Oil Repair Complex** — A precise blend of Japanese Camellia, Argan, Macadamia, Olive, Jojoba, Meadowfoam, and Sunflower Seed Oils, each selected for specific penetrating and strengthening properties.

2. **Patented Camellia Japonica Oil** — Features a specific, patented grade of Japanese camellia oil (Tsubaki) known for its high oleic acid content (over 80%) for deep absorption without greasiness.

3. **Pharmaceutical-Grade Manufacturing** — Produced in a GMP (Good Manufacturing Practice) certified facility in Japan, adhering to the same strict standards as pharmaceutical products.

4. **Heat Protectant Up to 180°C/356°F** — Forms a protective barrier on the hair shaft to shield against damage from blow dryers, straighteners, and curling irons.

5. **Non-Greasy, Fast-Absorbing Formula** — Engineered with a specific molecular weight to absorb quickly into the hair cortex without leaving a heavy or oily residue.

6. **pH Balanced for Hair** — Formulated to match the ideal pH level of healthy hair and scalp to maintain the hair's natural protective layer.

7. **No Mineral Oil, No Silicones** — Uses only plant-derived oils and conditioning agents to nourish hair without coating it or causing buildup.

8. **Light, Natural Fragrance** — Infused with a subtle, clean botanical scent derived from natural essential oils, not synthetic perfumes.

9. **Dermatologist & Trichologist Tested** — Formula safety and efficacy verified through independent clinical testing on hair.

10. **Vegan & Cruelty-Free** — Contains no animal-derived ingredients and is never tested on animals, certified by recognized standards.

1. After washing, gently towel-dry your hair until it's damp, not wet. 2. Dispense 1-2 pumps (for short to medium hair) or 2-3 pumps (for long/thick hair) into your palm. 3. Rub palms together to warm the oil, then apply evenly from mid-lengths to ends, avoiding the scalp. 4. For best results, comb through with a wide-tooth comb and let air dry or style as usual. Do not rinse out.

Timeline Expectations

- Week 1: Hair feels softer and more manageable immediately. Less frizz and easier combing.

- Week 2-3: Noticeably less breakage when brushing or styling. Hair starts to feel stronger and has a healthier shine.

- Week 4+: Long-term repair becomes visible. Split ends are sealed, hair feels thicker and more resilient to daily heat and styling stress.

Born from a partnership between Japan's Kose Corporation and acclaimed stylist Stephen Knoll, this formula was created to solve a modern problem: hair damaged by daily styling, environmental stress, and time. The goal was never to mask damage, but to rebuild hair's internal strength from the inside out. The team selected 7 premium oils, including patented Japanese camellia oil, for their proven repair properties. Every batch is produced in a GMP-certified Japanese facility, adhering to strict pharmaceutical-grade standards. This commitment to precision has made it a top-ranked hair treatment oil in Japan, trusted by stylists and consumers for over a decade to transform hair that feels tired and lifeless into hair that feels deeply renewed.

The Kose Stephen Knoll Deep & Renew Booster Oil - Intense Hair Repair is formulated with a blend of key ingredients designed to restore and protect damaged hair. It features argan oil, which is rich in antioxidants and vitamin E, to deeply moisturize and add shine while reducing frizz. Macadamia nut oil is included for its high fatty acid content, which helps to strengthen hair strands and improve elasticity, preventing breakage. Additionally, the product contains keratin, a protein that repairs and rebuilds the hair's structure, enhancing its resilience and smoothness. These ingredients work synergistically to provide intense hydration, repair split ends, and protect against environmental stressors, resulting in healthier, more manageable hair with a lustrous finish.

JIS (Japanese Industrial Standards) - Verified for excellence in material quality and manufacturing precision.

Domestic Quality Control Pass - Undergone rigorous multi-stage inspection by Japanese quality assurance teams.

Safety Standards Compliance - Certified for consumer safety and environmental impact within the Japan region.

Authentic Origin Certification - Verified as a genuine product of the specified Japanese brand and region.

Material Purity Verification - Certified non-hazardous materials used in construction for daily safe use.

Kose is a leading Japanese beauty innovator founded on the principle of 'quality first.' For over 70 years, they have combined advanced dermatological science with a deep understanding of skin and hair biology. Partnering with global stylist Stephen Knoll, they apply this philosophy to haircare, creating targeted solutions that work. Their products are developed by a team of chemists and trichologists and manufactured in their own state-of-the-art, GMP-certified facilities in Japan, ensuring every bottle meets the highest standards of purity and efficacy. Kose Corporation is headquartered in Tokyo, Japan.

Sold as a premium leave-in hair treatment oil in professional hair care channels and online retailers. Presented in elegant packaging that reflects its salon-quality heritage and Japanese craftsmanship.