Fine, flat, or frizzy hair that needs more body and strength. The BelleVie Keratin Volume Boost Conditioner 390ml is one of the best keratin conditioners for fine hair in the UK and Europe: hydrolyzed keratin rebuilds hair structure from within, caffeine stimulates scalp circulation to support stronger growth, and rosemary oil revitalises the scalp for extra volume and body. Gourmand aroma with fresh peppermint and rosemary on a vanilla, tonka bean, and sandalwood background. COSMOS Natural certified by ECOCERT. Vegan, cruelty-free, and EU-made.

Softer, shinier, more voluminous hair from the very first use. No heaviness. No buildup. No compromise.

What It Does

• Amplifies volume and body — adds natural fullness without heaviness or buildup
• Smooths frizz and flyaways — keratin proteins seal the hair cuticle for a sleek, polished finish
• Strengthens and repairs — hydrolyzed keratin rebuilds hair fiber integrity and reduces breakage
• Detangles effortlessly — improves manageability and reduces combing damage
• Restores shine and elasticity — Vitamin E and avocado oil nourish for a healthy, luminous finish
• Stimulates the scalp — caffeine and rosemary oil improve circulation and support stronger hair growth

Who It’s For

• Fine, thin, or flat hair that lacks volume and body — the best volumizing conditioner UK for fine hair
• Damaged, chemically treated, or heat-styled hair that needs keratin repair
• Frizzy or unmanageable hair seeking a smooth, polished finish
• Those seeking a scalp-stimulating conditioner with caffeine and rosemary oil
• All hair types — suitable for daily conditioning use across the UK and Europe

Key Ingredients

• Hydrolyzed Keratin — the same structural protein hair is made of; penetrates the hair fiber to rebuild strength, boost volume, and smooth the cuticle for frizz control and shine
• Caffeine — stimulates scalp microcirculation to support stronger, healthier hair growth; one of the most effective natural actives for scalp reactivation
• Rosemary Oil — clinically studied for scalp stimulation and hair growth support; revitalises the scalp and adds a fresh, invigorating note
• Vitamin E (Tocopherol) — antioxidant protection against environmental damage; promotes shine and scalp resilience
• Sodium PCA — NMF humectant that retains moisture in the hair shaft for lasting softness and manageability

BelleVie · Vegan · Cruelty-Free · EU-Made · COSMOS Natural Certified (ECOCERT) · Gluten-Free · Sulfate-Free · Clean Formula · Recyclable Packaging

How to Use

1. Apply to clean, damp hair after shampooing
2. Focus on mid-lengths and ends — avoid the scalp root area
3. Leave in for 1–2 minutes
4. Rinse thoroughly and style as usual
5. Suitable for daily use

Pro tip: For maximum volume and strength, pair with the Keratin Volume Boost Shampoo 390ml and finish with the Keratin Shine Leave-In Hair Mist 100ml for post-wash frizz control and shine.

Complete the keratin hair routine: Deep Cleanse Scalp Scrub with Rosemary & Mint 170ml for weekly scalp exfoliation, or the Rosemary Hair & Scalp Strengthening Oil 30ml as a pre-wash scalp treatment.

Frequently Asked Questions

Is this the best keratin conditioner for fine hair in the UK?

The BelleVie Keratin Volume Boost Conditioner combines hydrolyzed keratin (structure + volume), caffeine (scalp stimulation), rosemary oil (hair growth support), Vitamin E (antioxidant), and Sodium PCA (NMF moisture) — a COSMOS Natural certified thickening conditioner for fine, flat, and frizzy hair. Popular across the UK and Europe as a volumizing conditioner for thin hair.

Is this suitable for fine or thin hair?

Yes — specifically formulated to add volume and body without weighing fine hair down. The lightweight formula nourishes and strengthens without leaving residue or making hair feel heavy or flat.

Does keratin conditioner work on colour-treated hair?

Yes — hydrolyzed keratin is safe for colour-treated, chemically processed, and highlighted hair. It helps repair the damage caused by colouring and heat styling while extending the life of your colour by smoothing the hair cuticle.

How does caffeine help with hair volume?

Caffeine stimulates scalp microcirculation, improving blood flow to hair follicles and supporting stronger, healthier hair growth. Combined with rosemary oil — clinically studied for scalp stimulation — this conditioner reactivates the scalp for visibly fuller, more voluminous hair with consistent use.

Is BelleVie vegan and cruelty-free?

Yes — all BelleVie products are 100% vegan and cruelty-free, COSMOS Natural certified by ECOCERT Greenlife, and formulated and manufactured in the EU to the highest cosmetic safety standards.

Shipping

• USA: 1–5 business days from our US warehouse
• Europe: 2–9 business days
• Free shipping on orders over $100 USD / €85 EUR

Shop the full BelleVie Vegan Hair Care collection →