The Science
What’s in your water can affect what it touches.
Chlorine plays an important role in keeping water safe as it travels to our homes. Residual chlorine can remain by the time it reaches your shower.
Research suggests repeated exposure may influence skin moisture and hair weathering.
Skin
Moisture matters.
Research on residual chlorine in bathing water found changes in skin water-holding capacity, particularly in atopic skin.
Hair
Exposure adds up.
Research in swimmers has documented changes to the hair cuticle and cortex after repeated pool-water exposure.
Your water, one final step
Your water is treated for safety.
Nuori filters it for your routine.
Designed to reduce residual chlorine and common impurities at the shower.
The 8 stages of Nuori
Multi-stage filtration with Vitamin C.
Conceptual filter cross-section
- 01Stainless Steel Mesh
First-stage physical filtration
- 02PP Cotton
Helps capture sediment and suspended particles
- 03KDF-55
Commonly used to support chlorine reduction
- 04Calcium Sulfite
Helps reduce residual chlorine, including in warmer water
- 05Activated Carbon
Helps adsorb certain impurities and unwanted odors
- 06Vitamin C
Part of Nuori’s chlorine-focused filtration system
- 07Nuori Blend V1™
Our proprietary mineral-conditioning blend
- 08Ultra-Fine Stainless Steel Mesh
The final filtration layer before water exits the cartridge
Explore the research
Backed by research
Seki et al. — Skin moisture
Residual chlorine and skin moisture
Seki et al., Journal of Dermatology, 2003
The study compared forearm immersion in warm water at different residual chlorine concentrations. People with atopic dermatitis showed greater sensitivity in skin water-holding capacity than the healthy control group.
This study examines chlorine exposure; it does not test the Nuori product or establish a treatment effect.
Nanko et al. — Hair structure
Chlorinated water and hair structure
Nanko et al., Journal of Dermatology, 2000
Researchers compared elite swimmers with controls and examined discoloured hair using microscopy. They reported damage to the cuticle and changes in the hair cortex.
Swimming-pool exposure differs from everyday showering. These findings are background research, not a Nuori performance test.
Hair Exposome Review — 2024
How everyday exposures affect hair
Cedirian et al. — published online in 2024; 2025 journal issue.
This review discusses environmental and lifestyle exposures that can affect hair, including light, pollution and hair-care practices. It provides broader context for hair health, rather than testing a shower filter.
Chlorine reduction lab-tested. Other filtration is by design, not independently tested.