Hair Scripts Response Test
The Hair Scripts Response Test is Hair Scripts' proprietary at-home patch test that measures SULT1A1 enzyme activity — the key biological marker that predicts how well you will respond to Minoxidil. Results in 48 hours. Used to personalize your Minoxidil concentration before prescribing. No competitor offers this.
Skip the guesswork. The Hair Scripts Response Test measures your SULT1A1 enzyme activity — the key biological marker that predicts Minoxidil response — before we set your dose.
Image Coming Soon
What It Measures
What It Measures
Formulated with clinically-supported actives at effective concentrations.
SULT1A1 Enzyme Activity
Sulfotransferase 1A1 (SULT1A1) is the enzyme in scalp follicle cells responsible for converting Minoxidil into Minoxidil Sulfate — its active, hair-growth-promoting form. SULT1A1 activity varies significantly between individuals, which is why some patients see dramatic Minoxidil results and others see none at all. Testing your activity level allows your trichologist to set the right concentration from day one.
High SULT1A1 Activity
Predicts a strong Minoxidil response. Patients with high SULT1A1 activity efficiently convert topical Minoxidil to its active sulfate form at the follicle. These patients typically see significant density improvement at standard or moderate concentrations.
Low SULT1A1 Activity
Predicts poor topical Minoxidil response regardless of concentration. For these patients, your trichologist may recommend pivoting to oral Minoxidil (which is activated in the liver, not the scalp) or adjusting the protocol accordingly — rather than spending months on a topical that won't work.
At-Home Patch Test
The Hair Scripts Response Test kit is sent to your home. The test involves a simple forearm patch application. Results are photo-uploaded and graded by your trichologist within 48 hours. The entire process is done before your first prescription is written.
Personalized Prescribing
Your SULT1A1 result directly informs your starting Minoxidil concentration, delivery method (topical vs. oral), and whether add-on ingredients are indicated. This is precision hair medicine — and it's unique to Hair Scripts.
The Hair Scripts Difference
Every formula is built to your biology.
Concentrations adjusted. Ingredients added or removed based on your consultation. No preset blends. No fixed formulas.
Any Concentration
Minoxidil at 5%, 8%, 10%, or higher — set by your trichologist after reviewing your SULT1A1 response test.
Any Ingredient Combination
Add a DHT blocker, a peptide, an anti-inflammatory, or a penetration enhancer. Remove anything that doesn't fit your biology.
Trichologist-Built
Not a chatbot. Not an algorithm. A licensed trichologist reviews your intake and designs your protocol.
Competitors like Happy Head lock you into preset blends. Hair Scripts treats mix-and-match compounding as the standard, not the exception — because hair loss is biological, and biology isn't one-size-fits-all.
Usage
How to Use
- 1
Order the Hair Scripts Response Test kit — ships directly to your home.
- 2
Follow the included instructions to apply the test patch to your forearm.
- 3
Wait 48 hours and photograph the result using the provided guide.
- 4
Upload your photo through the Hair Scripts portal.
- 5
Your trichologist reviews your result and schedules your consultation with your SULT1A1 grade in hand.
Ready to get started?
Take the free hair assessment.
Five minutes. Understand your hair loss pattern and get a personalized product recommendation.