Free Shipping on Qualifying Orders $30+
TRY THESE TOO

Cart 0

Congratulations! Your order qualifies for free shipping You are £30 away from free shipping.
Sorry, looks like we don't have enough of this product.

Subtotal Free
View cart
Shipping, taxes, and discount codes are calculated at checkout

Your Cart is Empty

Award Winners
N.Lab Insiders
Blog

Kiseki Miracle Molecular Repair & Shine Ritual

£44.00

Out of stock

Mainichi Scalp Balancing Sake Rinse

£15.00

Out of stock
Bamboo comb with 'Nature Lab' branding on a white background

Mainichi Bamboo Treatment Comb

£8.00

Out of stock

Saisei Stress Defense Amino Acid Shampoo

£17.00
Shipping calculated at checkout.

Renewal at the root.
A gentle, scalp-first amino acid shampoo designed to support stronger, fuller-looking hair over time. This lightweight formula cleanses without stripping while reinforcing hair at the root for healthier-looking density and vitality.

 

Delivers as soon as Thursday, August 27
BENEFITS
  • Supports scalp health
  • Helps hair look stronger and fuller
  • Helps visibly reduce and tone down gray hair
  • Gentle for daily use
PERFECT FOR

Hair in the beginning to moderate stages of the graying or thinning processes.

All hair textures.

11.5 fl oz / 340 ml

SMELLS LIKE

A refreshing and elegant floral green fragrance inspired by Japanese iris. Evokes a rejuvenating breeze during a morning garden stroll in Japan. Centered around violet, with accents of celery, petitgrain, and davana, blended with a floral bouquet of mimosa, lily of the valley, and jasmine from France.

TOP NOTES
Celery, davana, petitgrain, violet leaves
MIDDLE NOTES
Muguet (lily of the valley), mimosa, French jasmine, cassis
BASE NOTES
Cinnamon, iris, cedarwood, musk

INGREDIENTS

SAISEI SHAMPOO:
Water, sodium lauroyl methylaminopropionate, cocamidopropyl betaine, lauramide dea, tea-cocoyl glutamate, lauramidopropyl betaine, sodium methyl cocoyl taurate, cocamide methyl mea, glutamic acid, picea mariana bark extract, butylene glycol, sodium pca, malus domestica fruit cell culture extract, epilobium angustifolium flower/leaf/stem extract, phyllostachys pubescens meristem cell lysate, rhododendron ferrugineum leaf cell culture extract, palmitoyl tetrapeptide-20, acetyl tetrapeptide-3, trifolium pratense (clover) flower extract, trifluoroacetyl tripeptide-2, glycerin, isomalt, polyquaternium-10, polyquaternium-50, argania spinosa kernel oil, sclerocarya birrea seed oil, simmondsia chinensis (jojoba) seed oil, sodium chloride, dextran, xanthan gum, argan oil polyglyceryl-6 esters, peg-160 sorbitan triisostearate, peg-7 glyceryl cocoate, lecithin, benzotriazolyl dodecyl p-cresol, dipropylene glycol, citric acid, sodium citrate, lactic acid, sodium metabisulfite, etidronic acid, pentasodium pentetate, phenoxyethanol, sodium benzoate, fragrance, ci 42090, ci 60730, caramel

Free U.S.* Shipping $30+

Free 30 Days Returns

Always Cruelty Free

We Give 1% Back For Every Sale

Complete your ritual:

Saisei Restoring Therapy Conditioner

£17.00

Out of stock

Saisei Biomimetic Peptide Treatment Essence

£35.00

Out of stock

Fuwari Volumizing & Conditioning Hair Masque

£15.00

Out of stock

Saisei Stress Defense Amino Acid Shampoo

£17.00

•

Your destination for scalp and hair health

•

Proven results through J-Beauty routines

•

Derived from nature, backed by science

HOW TO

Lather into wet hair from roots to ends. Rinse thoroughly.
Follow with Saisei Restoring Therapy Conditioner.

Pro Tip: Saisei is designed as a 3-step renewal system to support hair density and visible gray reduction. Use consistently for best results.

Tell Me More

Return to a clean slate for healthier hair growth with this gentle daily shampoo. Lightweight and non-irritating, the formula helps improve the scalp environment and enhance the restorative effects of our Saisei Biomimetic Peptide Treatment Essence. 

Saisei Stress Defense Amino Acid Shampoo’s blend of amino-acid and coconut-based surfactants thoroughly cleanse the hair and scalp without stripping moisture. Botanical ingredients such as apple extract and rosebay extract help soothe and hydrate the scalp to aid reduction of hair loss and sebum production. Naturally resilient and antioxidant-rich black spruce bark extract and bamboo extract work increase protection against oxidation and environmental stressors such as UV exposure. Strands are left feeling refreshed and rejuvenated.  

Designed to be used in a daily routine with the Saisei Restoring Therapy Conditioner and Saisei Biomimetic Peptide Treatment Essence.

11.5 FL OZ / 340 mL

Full Ingredient List

SAISEI SHAMPOO:
Water, sodium lauroyl methylaminopropionate, cocamidopropyl betaine, lauramide dea, tea-cocoyl glutamate, lauramidopropyl betaine, sodium methyl cocoyl taurate, cocamide methyl mea, glutamic acid, picea mariana bark extract, butylene glycol, sodium pca, malus domestica fruit cell culture extract, epilobium angustifolium flower/leaf/stem extract, phyllostachys pubescens meristem cell lysate, rhododendron ferrugineum leaf cell culture extract, palmitoyl tetrapeptide-20, acetyl tetrapeptide-3, trifolium pratense (clover) flower extract, trifluoroacetyl tripeptide-2, glycerin, isomalt, polyquaternium-10, polyquaternium-50, argania spinosa kernel oil, sclerocarya birrea seed oil, simmondsia chinensis (jojoba) seed oil, sodium chloride, dextran, xanthan gum, argan oil polyglyceryl-6 esters, peg-160 sorbitan triisostearate, peg-7 glyceryl cocoate, lecithin, benzotriazolyl dodecyl p-cresol, dipropylene glycol, citric acid, sodium citrate, lactic acid, sodium metabisulfite, etidronic acid, pentasodium pentetate, phenoxyethanol, sodium benzoate, fragrance, ci 42090, ci 60730, caramel

Inside The Formula

Key Ingredients

AMINO ACID SURFACTANT
Helps maintain scalp and hair’s natural moisture levels without stripping.

BLACK SPRUCE BARK EXTRACT
A sustainable upcycled extract that helps repair damage and protect the scalp and hair color from oxidation and environmental stressors.

APPLE EXTRACT
Soothes and hydrates the scalp with supercharged antioxidants. Helps preserve natural color and thickness while reducing shedding.


Formulated Without

Parabens, Sulfates, Phthalates, Over 1,300 ingredients that are banned in the EU, Animal Testing, Silicone, Animal Derived Ingredients


What is J-Beauty?

Efficacious, minimalistic treatments designed meticulously with trusted Japanese heritage, ingredients and technological innovation.

Developed with a distinctive Japanese approach: relentless pursuit of excellence in refining the optimal combination of time-tested tradition and science's latest discoveries.

NatureLab.TOKYO is Japanese beauty.

Awards + Press

PRESS

NEWBEAUTY, 2024

Well+Good, 2024

Marie Claire, 2024

The Tease, 2024

Trend Hunter, 2024

Shipping + Returns

Contiguous U.S. Shipping

Free shipping with orders $60+. We don't currently ship outside of the United States. Stay tuned for more updates.

Order Tracking

Tracking numbers are automatically sent as soon as your order is packed. Please check your junk folder if you do not receive one 72 hours after placing your order.

Get In Touch

If you have any questions about your order please email us at help@naturelab.com. Our customer service is available Monday through Friday from 8am until 12pm pst.

Customer Reviews

Overall rating: 4.3333335 / 5 from 6 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["hair","feeling","scent"].

Review highlights

Reviews

Great smell

"I love the smell and the consistency and that it's not made up of a bunch of bad stuff."

— Joelee A. (5/5)

"It smells good and I like the claims its made, but it turned my hair straw-like and dry. I thought it would be more moisturizing"

— Karli (3/5)

Love it

"I love the smell, the way my hair feels afterwards along with its conditioner to match. I was pleasantly surprised. I always use NatureLabs Repair shampoo because I love the way my hair shines and feels after every shower, but this is a close second to me. It will be added to my favorites to buy regularly"

— Samantha P. (5/5)

"Smells lovely and lathers well but my hair felt less than ideal after shampooing twice."

— Kim (3/5)

Shine

"This series gives my hair shine :)"

— Aiko F. (5/5)

My favorite

"Love this line. Been a staple in my hair routine for years"

— Brooke H. (5/5)

Q&A
Why J-Beauty Hair Rituals Deserve a Spot in Your Routine

LEARN MORE ON OUR BLOG:

Why J-Beauty Hair Rituals Deserve a Spot in Your Routine

J-Beauty is more than hair care—it’s a mindful ritual. With NatureLab.TOKYO, everyday routines become moments of balance, beauty, and lasting results.

Read more