Thickening Serum for Fragile, Fine Hair with Split Ends

Shu Uemura Izumi Tonic Serum 90ml is a professional luxury thickening serum designed for fragile, fine hair prone to breakage. Its lightweight leave-in formula helps strengthen the hair fiber, increase hair diameter and protect against split ends, leaving hair noticeably fuller, softer and more luminous.

Inspired by yu-su-ru, the ancient Japanese tradition of rinsing hair with rice water, this luxury serum combines the effectiveness of rice water with the benefits of ceramides to deliver advanced protection and a professional anti-breakage routine.

When used with the complete Izumi Tonic range, hair can be up to 30 times stronger*, thicker and with up to 91% fewer split ends**, for premium beauty by Shu Uemura Art of Hair.

Celebre Store is an authorized Shu Uemura retailer: we select only original, professional products. Since 1914, our salon expertise allows us to offer the best in luxury haircare with professional guidance and guaranteed quality.

*Instrumental test after shampoo + mask + conditioner
**Instrumental test after shampoo + mask + serum

Main Benefits

• Ideal for fragile, fine hair and split ends

• Helps strengthen the hair fiber

• Increases hair diameter and body

• Up to 30x more strength*

• Reduces split ends by up to 91%**

• Lightweight leave-in formula, no rinse

• Enriched with rice water and ceramides

• Delivers softness, shine and everyday protection

*Instrumental test after shampoo + mask + conditioner
**Instrumental test after shampoo + mask + serum

Luxury Thickening Serum for Weak Hair

Izumi Tonic Serum is the ideal treatment for those looking to improve hair structure and counter daily fragility. Its lightweight texture absorbs quickly without weighing hair down, helping to reinforce lengths and protect ends from breakage.

Perfect as a professional finish after shampooing and conditioning, it leaves hair softer, stronger and visibly healthier.

Formula with Rice Water and Ceramides

The exclusive formula is inspired by the Japanese yu-su-ru ritual and combines rice water with ceramides to provide advanced strengthening and protective action.

Rice water helps improve elasticity and resilience of the hair fiber, while ceramides help seal the cuticle and protect hair from everyday stressors.

The result is thicker, shinier hair that stays protected over time.

How to Use

After cleansing with Izumi Tonic shampoo and conditioning with the conditioner or mask from the same line, apply the serum to mid-lengths and ends of dry hair.

Do not rinse.

Proceed with your usual styling.

FAQ – Frequently Asked Questions

Is this serum suitable for hair that breaks easily?

Yes, it is specifically formulated for fragile, breakage-prone hair that needs daily reinforcement and protection.

Does it really thicken hair?

Yes, it helps increase the diameter of the hair fiber, making hair appear fuller and more voluminous.

Does it reduce split ends?

Yes, when included in the complete Izumi Tonic routine it helps reduce split ends by up to 91%.

Should it be rinsed out after application?

No, it is a leave-in treatment with no rinse, ideal as a daily finishing product.

Does it weigh down fine hair?

No, the formula is very lightweight and absorbs quickly without a heavy feel.

Where can I buy original Shu Uemura Izumi Tonic Serum?

At Celebre Store you will find only original Shu Uemura products, with authorized retailer guarantee and professional advice since 1914.