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Why Join UsFIRST DROP • LIMITED FOUNDER BATCH

Your tap water isruining your
hairskin
we built the fix!

Subtle up is hair + skin care engineered for hard water cities like Ahmedabad, Mumbai, Bangalore, Delhi. Join founder's club and lock 10% off forever.

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12,000+ already on the list • 312 spots left today

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DERMATOLOGICALLY TESTEDThe Silent Culprit
MADE IN INDIAThe Silent Culprit
SULFATE & PARABEN FREEThe Silent Culprit
CLINICALLY TESTEDThe Silent Culprit
VEGAN & CRUELTY FREE
THE SILENT CULPRITTHE SILENT CULPRIT

It's not your shampoo.It's your shower.

every Indian metro runs hard water full of calcium, magnesium and chlorine. it strips your hair, clogs your follicles and dulls your skin — no matter what products you use.

bullet

Delhi

850ppm

5x harder than safe limit

bullet

Bangalore

720ppm

calcium overload

bullet

Ahmedabad

780ppm

salt + silica buildup

bullet

Mumbai

640ppm

magnesium build-up

SOURCE: CGWB 2024 · SAFE TDS FOR HAIR < 150 PPM
bulletTHE SCIENCE, SIMPLIFIED

How hard water quietly destroys your hair.

four invisible steps happen every single shower. by month three, you notice it. by month six, you're googling "why is my hair falling out".

Hair texture close up
Ca²⁺ • Mg²⁺ • Cl⁻
THE THREE VILLAINS IN YOUR TAP
01

Calcium and Magnesium settle on the strand

Minerals cling to your hair cuticle within 30 seconds of contact

02

Cuticle cracks open

Mineral buildups forces the cuticle to lift - here moisture escapes, Frizz enters

03

Follicle gets choked

The film of minerals coats the scalp entirely which results in slow growth and weak new strands

04

Colour + protein washed away

Your shampoo can't lather properly and hence it strips lipids while leaving residue behind

The Silent Culprit8 WEEKS • REAL USERS

The kind of glow that used to take a salon.

Average results from our 247 person beta in Ahmedabad, Mumbai and Delhi. Unretouched.

Before treatment
BEFORE • WEEK 0
After treatment
AFTER • WEEK 8
94%
less hair fall in just 4 weeks
3X
more shine vs. their old shampoo
25%
build ups washed off in first use
made for hard water citiesThe Silent Culprit
dermatologically testedThe Silent Culprit
ph-balancedThe Silent Culprit
cruelty freeThe Silent Culprit
vegan formulasThe Silent Culprit
made for hard water citiesThe Silent Culprit
dermatologically testedThe Silent Culprit
ph-balancedThe Silent Culprit
cruelty freeThe Silent Culprit
vegan formulasThe Silent Culprit
made for hard water citiesThe Silent Culprit
dermatologically testedThe Silent Culprit
ph-balancedThe Silent Culprit
cruelty freeThe Silent Culprit
vegan formulasThe Silent Culprit
The Silent CulpritFIRST DROP • 3 HERO PRODUCTS

What early users steal before everyone else.

Gold Droplet Skincare Macro
Skincare Bottles Display
DERMATOLOGICALLY TESTEDDERMATOLOGICALLY TESTED

Skincare stole everythingfrom Korean beauty.We stole from Water Treatment Plants.

Our hero molecule binds with calcium and magnesium ions and washes them away - without stripping lipids from your hair making it extremely effective from First Wash.

bulletCo-developed with with people facing real issues with hard water
bulletTested across 247 real bathrooms in Tier -1 metros
bulletBacked by independent Mineral Reduction Report
FROM THE BETA INBOXFROM THE BETA INBOX

247 people tried it.231 said the same thing.

starstarstarstarstar
4.9 / 5 · 247 REVIEWS
ananya k.
ananya k.@ananyak·BENGALURU
starstarstarstarstar

i moved from chennai to bangalore and lost a fistful of hair in 3 months. one bottle in and my shower drain is finally empty.

ria m.
ria m.@riatries·DELHI
starstarstarstarstar

delhi water is genuinely violent. this is the first thing that hasn't lied to me. soft hair without the salon dependency.

kiara s.
kiara s.@kiaraskincare·AHMEDABAD
starstarstarstarstar

tested my tap — 780 ppm. my dermatologist literally recommended chelating. nice to have an indian brand that gets it.

tara b.
tara b.@taraonloop·MUMBAI
starstarstarstarstar

the texture of the serum is unreal. one pump, no greasy residue, hair feels like it did before mumbai monsoons happened to me.

WHY JOIN USWHY JOIN US

6 reasons your future hair willthank you.

10% off forever

10% off forever

Lock in a founder rate that never expires. Yes, even on refills.

Free shipping at launch

Free shipping at launch

Delivered before anyone else can buy

Early access to every future drop

Early access to every future drop

see new launches before the public does.

Lifetime restock priority

Lifetime restock priority

we sell out. you don't wait.

Private founders' channel

Private founders' channel

shape the brand. vote on next drops.

Free water test kit

Free water test kit

first 1,000 signups get a kit to test their tap.

MADE IN INDIA
Founder
bullet
bulletWHY WE EXIST

I lost half my hair after moving to Ahmedabad

doctors blamed stress. dermatologists blamed diet. one water test later, the truth was 720 ppm coming out of my tap. nothing on the market was built for this. so we built it.

— Aanya, founder
bulletQUESTIONS? ANSWERED!

FAQ

When does it actually drop?

first founder batch ships in the coming months. waitlisters get a 72-hour head start before anyone else.

Is the 10% off really forever?
What if hard water isn't my problem?
How do referrals work?
Do you ship outside metro india?
SubtelUp Hero Products

stop fighting your shower.

only 500 founder spots. once they're gone, prices go up, shipping costs money, and you're back to scrolling drugstore aisles wondering why nothing works.

FIRST DROP • LIMITED FOUNDER BATCH
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only 500 founder spots · no spam, one launch email · unsubscribe anytime.