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Izumi Tonic Strengthening & Thickening Rice Water Hair Serum

4.4 · 142 reviews
7,434 ₽

What it is: A lightweight, thickening hair serum infused with Japanese-sourced rice water that hydrates, repairs damage, reduces split ends, and strengthens fragile hair while leaving hair soft and shiny.Hair Type: Straight, Wavy, Curly, and CoilyHair Texture: Fine and MediumHair Concerns:- Shine- Volumizing- Damage, Split Ends, and BreakageKey Benefits: - Leaves hair 30x stronger and increases hair diameter*- Reduces split ends up to 91 percent and protects against future damage*- Leaves hair strands soft, smooth, and shinyHighlighted Ingredients:- Rice Water: Rich in amino acids, vitamins, and antioxidants to help restore damage and prevent future breakage.- Ceramides: Lock in moisture and hydration while strengthening strands.What Else You Need to Know: Inspired by yu-su-ru, the centuries-old Japanese beauty tradition of bathing hair in rice water, the Izumi Tonic range is formulated with rice water, which is known to restore hair damage, prevent future breakage, and reveal healthier and smoother hair. This leave-in treatment serum is powered by ceramides, perfect to thicken and increase hair diameter for hair lacking volume. Discover a lightweight formula that easily absorbs into hair to nourish and thicken without weighing it down. The precious rice water ingredient is sourced from Hyogo, Japan in an eco-friendly manner. (*System of shampoo, treatment, serum vs. non-conditioning shampoo.)Fragrance Description: A vibrant woody, musky fragrance that reinterprets a breathtaking rice field horizon. Opening with bergamot and lemon top notes infused in a heart of precious ylang-ylang, iris, sweet rice water, it also contains base notes of sandalwood with vanilla.Clinical Results: In a controlled study using a system of Izumi Tonic Shampoo, Mask and Serum- Hair diameter is thicker, hair is shinier- Hair is 30x stronger** When used system of Izumi Tonic Shampoo + Mask + serum vs. non. Conditioning shampoo- Appearance of split ends is reduced by 91%****When used system of Izumi Tonic Shampoo + Mask + serum vs. non. Conditioning shampoo

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What it is: A lightweight, thickening hair serum infused with Japanese-sourced rice water that hydrates, repairs damage, reduces split ends, and strengthens fragile hair while leaving hair soft and shiny.Hair Type: Straight, Wavy, Curly, and CoilyHair Texture: Fine and MediumHair Concerns:- Shine- Volumizing- Damage, Split Ends, and BreakageKey Benefits: - Leaves hair 30x stronger and increases hair diameter*- Reduces split ends up to 91 percent and protects against future damage*- Leaves hair strands soft, smooth, and shinyHighlighted Ingredients:- Rice Water: Rich in amino acids, vitamins, and antioxidants to help restore damage and prevent future breakage.- Ceramides: Lock in moisture and hydration while strengthening strands.What Else You Need to Know: Inspired by yu-su-ru, the centuries-old Japanese beauty tradition of bathing hair in rice water, the Izumi Tonic range is formulated with rice water, which is known to restore hair damage, prevent future breakage, and reveal healthier and smoother hair. This leave-in treatment serum is powered by ceramides, perfect to thicken and increase hair diameter for hair lacking volume. Discover a lightweight formula that easily absorbs into hair to nourish and thicken without weighing it down. The precious rice water ingredient is sourced from Hyogo, Japan in an eco-friendly manner. (*System of shampoo, treatment, serum vs. non-conditioning shampoo.)Fragrance Description: A vibrant woody, musky fragrance that reinterprets a breathtaking rice field horizon. Opening with bergamot and lemon top notes infused in a heart of precious ylang-ylang, iris, sweet rice water, it also contains base notes of sandalwood with vanilla.Clinical Results: In a controlled study using a system of Izumi Tonic Shampoo, Mask and Serum- Hair diameter is thicker, hair is shinier- Hair is 30x stronger** When used system of Izumi Tonic Shampoo + Mask + serum vs. non. Conditioning shampoo- Appearance of split ends is reduced by 91%****When used system of Izumi Tonic Shampoo + Mask + serum vs. non. Conditioning shampoo

Customer reviews

5.0
verified purchase
new addition to hair routine!

i love this product so much. it keeps my hair healthy and soft and amazing. the scent is nice and not overwhelming. the product itself is super lightweight

7/8/2026
3.0
verified purchase
Not for my hair type

[I received this product in exchange for my honest review] While the product was weightless and had a gel like consistency I didn’t think it worked well on my hair. My hair actually kinda felt dry after putting it on. I don’t think this works for my hair type but maybe for others

7/7/2026
5.0
verified purchase
Fuller-looking hair 👩‍🦰

[I received this product in exchange for my honest review] It has a lightweight texture that doesn’t leave my hair feeling heavy or greasy and adds a beautiful shine. I like using it as part of my routine because it helps my hair look fuller and more voluminous while making it feel stronger. It also leaves my hair soft and easy to manage. It’s an excellent option for anyone looking for fuller-looking hair without sacrificing a lightweight feel 👩‍🦰

6/28/2026
5.0
verified purchase
Must have in hair routine

[I received this product in exchange for my honest review] I am delighted with the texture and smell of this product. With just a little, it’s enough for all the hair and moisturizes it a lot. It leaves no residue, I use my curly hair and it favors it a lot. The instructions are very clear, totally worth the price.

6/13/2026
4.0
verified purchase
Good!!

[I received this product in exchange for my honest review] It’s so good! I wish the texture lasted a little longer and that the scent wasn’t so strong since it not the best scent to me. the packaging is perfect

6/5/2026
5.0
verified purchase
A must have ☺️💗

I’m loving this rice water treatment! 💕 It leaves my hair feeling soft, healthy, and noticeably stronger without weighing it down. The lightweight formula adds beautiful shine and makes my hair feel so smooth. Definitely a new favorite in my hair care routine! ✨

6/4/2026
4.0
verified purchase
So so

I don’t have strong opinions about this product. I can’t say that it made my hair feel thicker, but it does feel soft after I use it. It’s easy to apply, but again I didn’t find that it did much for my hair.

6/4/2026
5.0
verified purchase
Hair feels great!

[I received this product in exchange for my honest review] I’ve been using this serum after washing my hair and applying to dry hair. This is truly a very lightweight serum that doesn’t weigh down my hair. It actually helps my hair feel silky and my hair feels much stronger!

5/31/2026
5.0
verified purchase
Hair Care Game Changer!

[I received this product in exchange for my honest review] A game changer for the hair game. As someone with bleached, dead, limp hair, this has brought my hair back to life! It’s lightweight and doesn’t leave a weird consistency and smells good!

5/31/2026
4.0
verified purchase
Worth a try, great formula

[I received this product in exchange for my honest review] I actually really enjoyed using this. It didn't make my hair feel stiff or sticky like some thickening products do. it's not designed to detangler, but it had good slip so it raked through very easily. I think it is also better designed for straight hair as the direction say to rake it through dry hair, but I can't do that with my curls so I just used this to refresh my curls and it seemed to work fine. Will have to use this longer to see about long-term benefits though. I did notice that my ends felt a little smoother. smells absolutely wonderful too.

5/29/2026