Unlock your full hair growth 
potential today

HairOS™ Genetic Test

4.6
114 Trusted Reviews

Precision Hair Growth Insights

HairOS™ Genetic Test

4.6
114 Trusted Reviews

HairOS™ is a pharmacogenetic test built to optimize your hair-growth treatment plan. The report analyzes 15,000 genetic variants to help predict your response to the most effective medications and supplements.

Analyzes 11 nutrient plus scalp traits and 5 major hair markers including hormonal and other forms of hair loss risk, dandruff, thickness, and graying. A quick saliva swab gives you a lab-grade, personalized report.

Buy Together and Save!
$448.00 $250.00
29% OFF
FREE
Add Your Custom Treatment
Get a personalized prescription topical based on your HairOS insights and get 29% OFF and your first month FREE.
HairOS Test One-time Purchase
29% OFF $350 $250 | One-time Purchase
Custom Topical Treatment then $98/mo after trial
Free First Shipment | then $98/mo after trial
  • Predicts Your Response to Treatments
  • Reduces Trial-and-Error
  • Actionable, Clear Recommendations
  • Hair & Scalp Health Insights
  • Easy At-Home Saliva Sample Collection
$350.00
Go Free Shipping Go Personal Data Secure Go CLIAA Lab Certified Go 99.9% Test Accuracy
  • Predicts Your Response to Treatments
  • Reduces Trial-and-Error
  • Actionable, Clear Recommendations
  • Hair & Scalp Health Insights
  • Easy At-Home Saliva Sample Collection

Get Answers to Your Hair Loss Questions

HairOS decodes your hair genetics.

By analyzing how your unique genetics affect hair growth, loss, and nutrient
absorption, we can predict your response to the most common treatments — and guide you toward the ones that actually work for you.

Discover My Hair Genetics
phone

Comprehensive Hair Genetics
Analysis Report

Detailed genetic insights for personalized hair health optimization

dna

GENETIC
PREDISPOSITIONS

  • Hair Loss
  • Hair Thickness
  • Hair Graying
  • Dandruff
  • Alopecia Areata
droplet

NUTRIENT
PROCESSING ANALYSIS

  • Essential Vitamins
  • Critical Minerals
  • Additional Nutrients
search

TREATMENT
RESPONSE PREDICTION

  • DHT Blockers
  • Follicle & Circulation Boosters
  • Supportive Treatments
user

PERSONALIZED
RECOMMENDATIONS

  • Treatment Regimen
  • Lifestyle Optimization

Comprehensive Hair
Genetics Analysis
Report

Detailed genetic insights for personalized hair health optimization

  • dna

    GENETIC
    PREDISPOSITIONS

    • Hair Loss
    • Hair Thickness
    • Hair Graying
    • Dandruff
    • Alopecia Areata
  • droplet

    NUTRIENT PROCESSING
    ANALYSIS

    • Essential Vitamins
    • Critical Minerals
    • Additional Nutrients
  • search

    TREATMENT RESPONSE
    PREDICTION

    • DHT Blockers
    • Follicle & Circulation Boosters
    • Supportive Treatments
  • user

    PERSONALIZED
    RECOMMENDATIONS

    • Treatment Regimen
    • Lifestyle Optimization

How it works

step-one
1
step-one
1
2 MINS

Order your at-home test kit

Delivered straight to your door.

step-two
2
step-two
2
5 MINS

Swab & send

Collect a cheek swab in minutes and return with our prepaid label.

step-three
3
step-three
3
2-3 WEEKS

Get your results

Receive your personalized DNA hair health report.

Who HairOS™ Is For

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Tired of Guessing Treatments

For anyone who wants clear guidance on what will actually work.

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Want to Avoid Trial and Error

Skip wasting months on products that won’t help.

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Curious About Genetic Impact

See if you’re genetically prone to common hair or scalp issues.

icon

Early Signs of Thinning

Noticing shedding, a receding hairline, or crown thinning.

icon

Want a Personalized Plan

Treatment recommendations tailored to your genetics.

icon

Exploring Prescription Care

Ideal if considering medicated or dermatologist-guided solutions.

icon

Early Signs of Thinning

Noticing shedding, a receding hairline, or crown thinning.

icon

Tired of Guessing Treatments

For anyone who wants clear guidance on what will actually work.

icon

Want a Personalized Plan

Treatment recommendations tailored to your genetics.

icon

Want to Avoid Trial and Error

Skip wasting months on products that won’t help.

icon

Exploring Prescription Care

Ideal if considering medicated or dermatologist-guided solutions.

icon

Curious About Genetic Impact

See if you’re genetically prone to common hair or scalp issues.

This isn’t guesswork
— it’s science.

Our DNA test is built on more than 42 peer-reviewed studies and over 100 scientific citations. From understanding minoxidil response genes to mapping DHT pathway sensitivity, every recommendation is rooted in validated research..

That means your plan is more than just personalized — it’s evidence-based.

“DNA-guided treatment improves response rates by matching patients to the right therapies faster.”

Dr. Omeed Ahadiat

Board-Certified Dermatologist

doctor

What We Test For And Why

Your genetic makeup and hormones play a key role in your hair loss and how your body responds to hair loss treatments. We analyze 15,000+ genetic variants to cut the guesswork and match you with the therapies your body will respond to.

  • MUC1

    Mucin 1

    This gene is related to magnesium absorption. Variants could indicate if magnesium supplementation might benefit your hair health.

  • DMGDH

    Dimethylglycine Dehydrogenase

    This gene affects your body’s selenium levels. Low selenium can impact hair health, so variants here might suggest the need for supplementation.

  • SULT1A1

    Sulfotransferase 1A1

    This gene affects how well you activate minoxidil. Variants may suggest the need for a higher dose or additives like tretinoin.

  • SRD5A1 & SRD5A2

    Steroid 5-Alpha-Reductase

    These genes influence DHT levels, which affect hair loss risk. High activity may increase risk, suggesting DHT-blocking treatments like finasteride, dutasteride, or spironolactone.

  • MTHFR

    Methylenetetrahydrofolate Reductase

    This gene influences your body’s folate levels, which are essential for healthy cell growth, including hair follicles. Variants may impact your need for folate supplements.

  • GPR44-1 & GPR44-2

    Prostaglandin D2 Receptor

    These genes reveal your sensitivity to prostaglandin D2, linked to hair loss. Cetirizine may help by blocking this pathway.

  • COL1A1

    Collagen Type 1 Alpha 1

    This gene influences collagen production, affecting hair strength and whether supplements may be beneficial.

FAQs

Your Questions, Answered

Here are some questions we usually get about Roots by GA. If you would like yours answered, please contact us.

Still have questions?

Email us at help@rootsbyga.com

View More FAQs
How does the HairOS™ genetic test work? +

The test analyzes ~15,000 genetic variants related to hair biology, scalp health, nutrient pathways, and medication response. With a simple saliva swab, our lab translates your DNA into a personalized hair-growth protocol.

How long does it take to get results? +
Is this test accurate? +
Do I need to visit a clinic? +
Is my genetic data secure? +
What if I’m already using hair-growth products? +
Do I have to buy the custom treatment or topical after? +
Do I need to take the test again later? +
4.6
Based on 114 reviews
 

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