Safety is Garnier's absolute, non-negotiable priority. Garnier Olia is formulated under strict international safety standards. However, because allergic reactions are an individual sensitivity, it is mandatory to perform an Allergy Alert Test (AAT) 48 hours before every single application, even if you have used coloring products before. This 48-hour test is recognized by global scientific authorities as the most effective preventive measure to ensure a safe home-coloring experience.

Unlike traditional hair colors that rely on ammonia, Garnier Olia is 100% ammonia-free and powered by an innovative 60% natural-origin flower oil blend. This Oil Delivery System (ODS) technology doesn't just color; it uses the power of oil to drive colorants deep into the heart of the hair fiber for maximum performance. This gives you rich, vivid color and 2x more shine compared to unwashed hair, accompanied by a pleasant, floral scent instead of a harsh chemical smell.

Yes. Despite its gentle, ammonia-free formula, Garnier Olia is engineered for high performance. It provides up to 100% grey coverage, ensuring that even the most stubborn white or grey hairs are perfectly covered with vibrant, lasting color.

On the contrary, Garnier Olia is specifically designed to visibly improve hair quality. Because the formula is enriched with natural-origin flower oils and contains no ammonia, it prevents dryness and provides intense care. In clinical consumer tests, 98% of women saw no visible damage to their hair. Your hair is left feeling softer, silkier, and deeply nourished.

The Garnier Olia kit is designed for simple, neat, and professional-feeling application at home. Each pack contains: 1 bottle of Developer Cream, 1 tube of Hair Colorant Cream, 1 sachet of Post-Color Conditioner, 1 set of Instruction Leaflets and 1 pair of Gloves To prepare, simply wear the gloves, mix the entire contents of the Developer Cream and Colorant Cream together in a non-metallic bowl with a hair coloring brush until smooth, and apply immediately.

Applying Olia is straightforward:
- Preparation: Keep your gloves on and apply the smooth mixture to dry, unwashed hair. Start at the roots, separating the hair strand by strand.
- Distribution: Quickly spread the remaining mixture through the rest of your hair, ensuring total coverage.
- Development: Leave the mixture to develop for 25 minutes. If your hair is particularly resistant to color or if you have over 70% grey hair, let it develop for 35 minutes before rinsing thoroughly and applying the post-color conditioner.

Yes, absolutely. A common misconception is that ammonia is required to open the hair cuticle for grey coverage. Thanks to breakthrough Oil Delivery System (DS) technology, Garnier’s ammonia-free formulas can achieve up to 100% grey coverage. Instead of using harsh chemicals to open the hair, our technology uses a high concentration of flower oils to naturally propel rich color pigments deep into the hair fiber. This ensures stubborn white and grey hairs are fully covered while keeping the application gentle and odor-free

Permanent hair color is designed to be long-lasting and will not wash out. However, as your hair grows, your natural roots will start to show, and external factors like sun exposure or frequent washing can affect the vibrancy of your tone. To maintain a fresh, seamless look, we recommend touch-ups every 4 to 8 weeks depending on your hair growth rate.

Maintaining your hair color’s "day-one" vibrancy requires a smart aftercare routine:
Start with the right dye: Choosing an oil-rich, ammonia-free color like Olia helps seal the hair’s outer cuticle during the coloring process, locking the pigments in.
Wash with care: Always wash color-treated hair with sulfate-free shampoos and nourishing conditioners.
Protect from heat: Limit hot styling tools and rinse your hair with lukewarm or cool water to prevent opening the hair cuticle, which allows pigments to escape.