When Niki moved from Seoul to Europe, she started losing hair – more than ever before. She wanted a shower routine that worked with the local water. London water carries far more dissolved minerals and chlorine than Seoul's. She developed the PICKI NIKI filter shower head with Korean lab partners as part of her own filtered-shower routine. Today, many customers report softer-feeling hair, less mineral build-up, and a calmer-feeling scalp. Individual experiences vary.
"Excellent"
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Dull, dry, frizzy hair? It might be your shower water, not your hair.
One fix. One shower head: chlorine neutralised, hard water (mildly) chelated, rust and sediment caught, full pressure - from the very first shower.
Vitamin C + sediment filter pre-installed
Free UK shipping from £85
60-day money-back guarantee
AS SEEN IN
OUR STORY
Niki Lee, Founder
HOW ONE HEAD DOES IT
One fix. Four things sorted.
Rust & sediment - caught
A dedicated sediment pre-filter (nominal 5 µm) captures the particles old plumbing releases - rust, metal flakes, sand and grit - before the water reaches you. Replace the cartridge every 1-3 months - you can see when it's due, the housing is transparent.
Hard water - mild chelation
Ascorbic acid (vitamin C) is a mild chelator of calcium: it can form water-soluble calcium ascorbate, which rinses away with the water rather than drying on skin and hair.⁸ No shower filter softens water - hardness stays in the water.
Chlorine - neutralised
Vitamin C reacts with free chlorine on contact and turns it into chloride - the principle utilities use to dechlorinate water mains (AWWA C651-05).
Full pressure - kept
Good Housekeeping Institute named it Best Flow Rate in its 2026 shower-filter test (83/100). Saves up to 35% water compared with older, unrestricted shower heads (12-15 L/min) - based on our own flow-restrictor measurement, not a third-party lab test.
THE HIDDEN CAUSE
Three things in your water are working against your hair
If you shower daily in London or the South East - among the hardest water in Europe - these three reach your hair and scalp with every wash.
Chlorine
17Cl₂
Strips your hair's natural oils and leaves the scalp drier with every daily shower.
Hard-water
20Ca
12Mg
The same limescale that furs up your kettle coats every strand - dulling its shine and body.
Rust & impurities
26Fe
Carried in from old pipes - adds to scalp irritation and dull-looking hair.
Day after day, this combination can affect:
Hair thinning
Looks finer and flatter over time - one daily factor you can control (a dermatologist covers the rest).
Looks finer and flatter over time - one daily factor you can control (a dermatologist covers the rest).
Hair strength
Residue weighs hair down, so it loses its bounce and shine.
Residue weighs hair down, so it loses its bounce and shine.
Scalp balance
Chlorine and residue leave the scalp tight and less comfortable.
Chlorine and residue leave the scalp tight and less comfortable.
Fix the cause, not the symptoms.
Most shower filters solve only part of this - usually just chlorine, or basic particle filtration. Real shower water carries several factors at once, so partial filtration gives partial results.
Fix the water, and your hair stops fighting it.
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1
Chlorine, neutralised on contact:
The Vitamin C gel reacts with free chlorine before it reaches your hair - so it can't strip your natural oils or leave your scalp tight and dry.
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2
Less hard-water residue feel:
Vitamin C mildly binds calcium⁸ - it does not soften the water, but there is less of that residue feel on hair and scalp.
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3
Rust and sediment, caught first:
A sediment pre-filter (nominal 5 µm) captures rust, metal flakes, sand and grit from old plumbing before they reach your hair.
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4
Full flow, gentle from the first wash:
Rated Best Flow Rate by the Good Housekeeping Institute (2026). No build-up phase, no waiting - it works from day one.
Two stages
The dual filtration system
Two problems ride in with every shower. One filter for each - so your hair and scalp finally meet cleaner water.
Rust
Pipe debris
Particles
1Step 1
Sediment filtration
Removes rust, particles and pipe debris, regardless of flow rate or temperature. Hot water accelerates the release of rust and debris from old pipes - 5μm melt-blown cartridge in sealed full-flow housing, 100% pass-through, no bypass.
5μmmelt-blown PP
≥95%of particles above 5μm
Works in anyflow rate or temperature
Chlorine
Calcium(hard water)
Magnesium(hard water)
2Step 2
Vitamin C filtration
A high-concentration Vitamin C formula that neutralises chlorine on contact and forms soluble complexes with calcium and magnesium minerals. Reacts directly with chlorine on contact - even in fast-flowing water. More active in warm water - suited to hot showers.
Reacts on contact~0.1 sec contact time at shower flow
More activein warm water
Designed forhot showers
Together
Physical filtration
+Chemical filtration
=Complete shower filtration
Designed to be used together – not separately.
Step 1 protects by removing what you can see.
Step 2 protects by neutralising what you can't.
Together, they deliver cleaner, better shower water.
The Filter Built for Showering - Not a Kitchen Tap
| Vitamin C Gel PICKI NIKI | Activated Carbon Adsorbent media | KDF 55 Zinc/copper redox | Mineral / Ceramic Beads Mechanism varies by product | |
|---|---|---|---|---|
| Built for | Showers | Drinking water & showers | Drinking water & showers | Varies by product |
| Used by | PICKI NIKI; Korean K-beauty filtered shower heads | Most pitcher and faucet filters; many premium shower filters | Industrial water treatment; some premium shower filters | Most cheap 'Vitamin C ball' shower heads and ionic/wellness products |
| Chlorine neutralisation | Direct chemical reaction (AWWA C651-05) | Catalytic surface reaction - depends on contact time and remaining media capacity | Zinc/copper redox media | Mechanism varies by product |
| Softens hard water | No - no shower filter softens water; hardness stays in the water | |||
| Sediment, rust & debris | Melt-blown PP cartridge, sealed full-flow housing - 100% pass-through | Adsorbent media - not a dedicated sediment stage | Redox media - not a dedicated sediment stage | |
| End-of-life signal | Visible - gel consumed | No visual change in the media |
⁶ KEWI residual chlorine test (2020): 100 L test water at 0.19 mg/L free chlorine → non-detectable, flow 2.52 L/min, 21-23 °C. Real shower flow (KTR) is 7.5 L/min; 'non-detectable' gives no detection limit, so no percentage follows. KEWI is not KOLAS / ISO 17025 accredited.
REAL RESULTS
What Customers Notice After Switching To Filtered Shower Water
Before
After
London
Fuller-Looking Hair, Less Breakage
Chlorine and hard-water minerals leave hair drier and more brittle, so it snaps and breaks more easily - and over time can start to look thinner and flatter. Take that daily stress away, and hair holds its body and strength better: less breakage, fuller-looking, wash after wash. (Thinning has many causes, including genetics; for medical hair loss, see a professional.)
Before
After
Barcelona
Softer, Shinier Hair
Hard water and chlorine can leave hair feeling rough and dull. The filter neutralises free chlorine, and vitamin C mildly binds calcium - so there is less of that residue feel on every strand. Hair can feel softer and easier to run your fingers through. Individual experiences vary.
Before
After
Berlin
Calmer, Less Flaky-Looking Scalp
Chlorine and hard water strip moisture from the scalp with every shower, which can leave it dry, tight and flaky-looking over time. Filtered water lifts that daily burden, so the scalp has room to stay calmer and more balanced - the foundation for hair that looks and feels better. One environmental factor you can actually control.
Real, unretouched customer photos. Individual observations; results can vary.
HAIR
When There’s More in the Brush Than on Your Head
More strands in the plughole, more scalp in the mirror?
Thinning has many causes - genetics and medical ones belong with a professional. But one daily factor you can control is your water: chlorine and hard-water minerals stress the scalp and coat every strand, so hair looks limp and less full over time. Take that daily load away, and hair holds its body better - fuller-looking, less breakage, wash after wash.
Individual experiences vary; for medical hair loss, see a professional.
Real customers. Real water. Real change.
They tested it on their own water.
As tested by the press
Recommended by the press, year after year
Independently tested – 2026 and 2025 in a row.
2026
Tested byGood Housekeeping Institute
Best for Water Hardness & Best Flow Rate
GHI Lab Panel · 83/100
"Panellists told us their hair felt softer and healthier …"
– Good Housekeeping Institute
2026
Tested byThe Standard
Best: Shower head for aromatherapy
ES Best · The Standard
"… a worthy contender for those prioritising skin and hair health …"
– The Standard
2025
Tested byThe Independent
Best Overall Filtered Shower Head 2025
IndyBest · The Independent
"After washing my hair just once, it felt smoother, silkier and shinier …"
– The Independent
THE WHOLE FAMILY
Gentle for the Whole Family – Including Little Ones
We filter our drinking water. Why not our shower water?
Children's skin is more delicate. The PICKI NIKI filter material is dermatologically tested non-irritant (P&K Skin Clinical Research Centre, n=30).⁴
One shower head serves everyone in your household.
THE VALUE
Around 25p per person a day – the base your haircare routine sits on
You’ve spent hundreds on your hair - shampoos, serums, salon visits. None of it fixes the water you wash it in. PICKI NIKI works on the water - reducing free chlorine and the mineral-residue feel before contact. A whole-house water softener runs £1,000+ to install and still won’t touch the chlorine; this fits any shower hose in 20 seconds.
The PICKI NIKI starter set includes everything you need. Replacement filters cost just £15/month – less than a single salon treatment. You’re in good company: nearly half of our UK customers shower in London’s hard water. And if it doesn’t work for you? Money back within 60 days: the shower head even if used, filter cartridges while unopened.
GOOD TO KNOW
The details
Aromatherapy in every shower
Tea Tree, Baby Powder or unscented vitamin C filters. The Standard named it Best Shower Head for Aromatherapy: "…turned my shower cubicle into a mini spa…"
Fitted in seconds
No plumber, no tools: it screws onto your existing shower hose. "Installation takes seconds" – The Independent.
Take it wherever you go
Compact, with a slim travel pouch for holidays or the gym. "…impressively compact and lightweight…" – The Standard.
Two filter stages
A sediment pre-filter catches rust, sand and pipe debris; a vitamin C gel filter neutralises free chlorine.
Vitamin C, used up as it works
The vitamin C is consumed as it neutralises free chlorine, so you can see when the gel filter is due - typically every 2-4 weeks for a household of two showering daily.
Full, fine spray
200 micro-holes for a full, even stream. The Good Housekeeping Institute named it Best Flow Rate in its 2026 test (83/100).
Give your hair back its good days.
Nothing works if your water works against you. Chlorine and hard water hit your hair and scalp every single shower. PICKI NIKI takes that daily stress out of the water - no plumber, fits any hose in 20 seconds.
Test it in your own shower for 60 days.
Not for you? Send it back for a refund: the shower head even if used, filter cartridges while unopened.
Starter set, 30% off:
✓ shower head + 8 filters
✓ free UK shipping
✓ 60-day money-back guarantee
Frequently Asked Questions
EVIDENCE & SOURCES
References
Studies on hair follicle biology, hard water effects, and product safety testing.
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Jun M, Kwack M, Kim M. Particulate Matters Induce Apoptosis in Human Hair Follicular... peer reviewed
Jun M, Kwack M, Kim M. Particulate Matters Induce Apoptosis in Human Hair Follicular Keratinocytes. Annals of Dermatology. 2020.
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Samra T, Lin RR, Maderal A. The Effects of Environmental Pollutants and Exposures on... peer reviewed
Samra T, Lin RR, Maderal A. The Effects of Environmental Pollutants and Exposures on Hair Follicle Pathophysiology. Skin Appendage Disorders. 2024.
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Luqman MW, Ramzan M, Khan MA, et al.. Effects of hard water on hair.... peer reviewed
Luqman MW, Ramzan M, Khan MA, et al.. Effects of hard water on hair. Int J Trichology. 2018.
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P&K Skin Clinical Research Centre. Primary Skin Irritation Test. Seoul, Korea. 2023.Independent open-label, single-arm... lab test
P&K Skin Clinical Research Centre. Primary Skin Irritation Test. Seoul, Korea. 2023.
Independent open-label, single-arm 24-hour patch test on Vitamin C filter material. n=30 (28F/2M, mean age 47.2y). Skin Irritation Index 0.03 (range 0.00-0.25 = non-irritant). Zero adverse events. Sample size and design are appropriate for a tolerability/irritation screen, not a clinical efficacy trial.
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Korea Environment and Water Works Institute (KEWI). Residual Chlorine Removal Test. Seoul, Korea. 2020.100... lab test
Korea Environment and Water Works Institute (KEWI). Residual Chlorine Removal Test. Seoul, Korea. 2020.
100 L synthetic water at 0.19 mg/L free residual chlorine, passed through Vitamin Filter. Outlet: not detected. Flow 2.52 L/min. T = 21-23 degrees C.
Note: real shower conditions are typically higher pressure and warmer than this laboratory test. The Vitamin C gel cartridge is engineered as a self-regulating system: higher pressure releases more Vitamin C from the gel matrix, and higher temperature accelerates the chlorine-neutralisation reaction. Under typical shower conditions these dynamics are expected to keep real-use performance broadly comparable to the laboratory result.
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Korea Environment and Water Works Institute (KEWI). Drinking Water Quality Test (60 parameters). Seoul,... lab test
Korea Environment and Water Works Institute (KEWI). Drinking Water Quality Test (60 parameters). Seoul, Korea. 2020.
Filter output tested against the Korean Drinking Water Standard across 60 parameters. Heavy metals (lead, arsenic, mercury, cadmium, chromium, cyanide) and pesticides: not detected. Confirms the filter itself does not introduce these contaminants into the water passing through it. Tested on shower-filter output, not feed water.
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Tsao CS. Solubility of calcium ascorbate and its formation in aqueous solutions of ascorbic... peer reviewed
Tsao CS. Solubility of calcium ascorbate and its formation in aqueous solutions of ascorbic acid and calcium salts. Experientia. 1984;40(2):168-170.
In-vitro solubility study. Ascorbic acid can bind calcium as water-soluble calcium ascorbate; the extent of any such effect at the vitamin-C dose of a shower filter has not been measured. No shower filter softens water.
Full certification numbers and test report IDs are available on request.