Hair Science/DNA Hair Loss Test: How the Fagron TrichoTest Works and UK Pricing Compared

Fagron TrichoTest DNA hair loss test kit

Diagnosis4 August 2026(Updated: 4 August 2026)

DNA Hair Loss Test: How the Fagron TrichoTest Works and UK Pricing Compared

What is a DNA hair loss test?

A DNA hair loss test analyses specific variations in your genes to predict how likely you are to respond to different hair loss treatments. Instead of trying finasteride, then minoxidil, then dutasteride over 18 months to see what works for you, a genetic test can tell you upfront which treatments are most likely to be effective, and which are likely to be a poor match.

The best-known DNA hair loss test in the UK is the Fagron TrichoTest®, sold through partner pharmacies including ours. This guide covers how DNA testing for hair loss works, what the report tells you, what it can and cannot do, and how UK pricing compares.

How the TrichoTest works

The TrichoTest is a buccal (cheek) swab collected at home. You take the swab, return it in a prepaid envelope, and Fagron's laboratory analyses your DNA against 26 single-nucleotide polymorphisms (SNPs) associated with hair loss and treatment response.

The 26 SNPs are grouped into 9 pathway categories:

Prostaglandins and sulphotransferase: sulphotransferase activity is what converts topical minoxidil into its active form; low activity predicts poor topical minoxidil response
Anti-androgens: response to finasteride, dutasteride and spironolactone
Anti-inflammatory response
Circulation stimulation
Collagen synthesis
Insulin-like growth factor (IGF-1)
Vitamin absorption
Mineral absorption
Antioxidant needs

Turnaround is typically 2 to 3 weeks after the sample arrives at the lab.

What the TrichoTest report tells you

The personalised report has three parts:

Drug efficacy panel: a colour-scale rating of how you are likely to respond to each treatment, with percentage estimates of predicted efficacy and red flags for treatments unlikely to help you
Treatment plan: a personalised recommendation drawn from a possible 62 active ingredients across 11 delivery vehicles (oral, topical solutions, sprays, creams, foams and mesotherapy)
Pharmacogenetic results: vitamin, mineral and supplement guidance based on your genetic absorption and response profile

Which treatments does the TrichoTest evaluate?

Finasteride (oral and topical)
Dutasteride (oral and topical)
Minoxidil (oral and topical)
Spironolactone (typically topical, primarily for female pattern hair loss)
Latanoprost and 17-α estradiol (specialist topical options)
Cetirizine and triamcinolone (inflammatory-driven hair loss)

Who benefits most from a DNA hair loss test?

The TrichoTest is not necessary for everyone with hair loss. Standard first-line UK treatment (finasteride 1mg oral or topical, plus minoxidil) works for most people without genetic testing. The test is most useful if you:

Have plateaued on standard treatment after 6 to 12 months
Are choosing between multiple treatment options and want clarity
Have tried previous treatments with mixed or disappointing results
Want to know whether topical or oral is likely to suit you before committing
Have a family history of poor response to hair loss treatment
Want to avoid the trial-and-error timeline of testing treatments sequentially

What DNA hair loss testing cannot tell you

Genetic testing is a treatment-response predictor, not a diagnosis. Important limitations:

It does not diagnose the cause of your hair loss (that still needs clinical assessment)
It does not rule out non-genetic causes of hair loss (stress, iron deficiency, thyroid, medication side effects, autoimmune)
Predicted response percentages are probabilistic, not guaranteed
Environmental and lifestyle factors still matter
It is not a substitute for ongoing clinical review while on treatment

Is the TrichoTest worth it in the UK?

Yes, if:

You want to skip trial-and-error on treatment selection
You have specific questions about topical vs oral, or single-agent vs combination
You are frustrated by a treatment not working as expected
You want a clear framework for a long-term plan

Probably not, if:

You are early in hair loss and haven't tried standard first-line treatment yet
You want a definitive diagnosis of your hair loss cause (needs clinical assessment)
You want a guarantee of results (the test predicts probability, not certainty)

How to take the TrichoTest in the UK

Order the Fagron TrichoTest® kit for £240
Kit arrives discreetly by post, next working day
Take the cheek swab at home (2 minutes, no blood, no fasting)
Return in the prepaid envelope
Fagron's laboratory analyses your sample (typically 2 to 3 weeks)
Our team reviews your report and shares a clear plan by email
If prescription treatment is appropriate, a UK prescriber arranges it and dispenses through a GPhC registered UK partner pharmacy

Frequently asked questions

What is a DNA hair loss test?+

A DNA hair loss test analyses specific genetic variations to predict how likely you are to respond to different hair loss treatments. The best-known in the UK is the Fagron TrichoTest, which uses a cheek swab and analyses 26 SNPs across 9 hair-loss pathways.

Does DNA testing for hair loss actually work?+

It works as a treatment-response predictor, not as a diagnostic. The test identifies genetic variations that correlate with response to specific medications (like the sulphotransferase gene that determines whether topical minoxidil is activated in your skin). It cannot guarantee results and does not replace clinical assessment, but it can meaningfully shortcut the trial-and-error phase of finding the right treatment.

How much does the Fagron TrichoTest cost in the UK?+

The Fagron TrichoTest is a private-pay test in the UK. Prices vary by provider. At Hair Repair Clinic the kit, lab processing, clinical review and prescription follow-through are £240 all-in. Some providers price these elements separately, so it is worth checking what is included when you compare.

How long does the TrichoTest take?+

Kit arrives next working day. Swab takes 2 minutes. Once the sample reaches Fagron's lab, analysis takes typically 2 to 3 weeks. Report and clinical review usually delivered within a month of ordering.

Do I need a DNA hair loss test before starting treatment?+

No. Standard first-line UK treatment (oral or topical finasteride with minoxidil) works for most people without any genetic testing. The TrichoTest is most useful if standard treatment has plateaued, if you want clarity before committing to a specific option, or if you have had mixed results with previous treatments.

Can the TrichoTest diagnose the cause of my hair loss?+

No. It predicts treatment response, not underlying cause. Diagnosing the cause (male or female pattern loss, telogen effluvium, alopecia areata, nutritional or hormonal causes) requires clinical assessment. A DNA test can complement diagnosis but does not replace it.

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Medical reviewer: Dr Ahmad Moussa MB BCh, MSc, MRCS(Eng), MD, FRCS(SN), NHS Neurosurgeon and Hair Transplant Surgeon.

Published: 4 August 2026. Last updated: 4 August 2026. Last reviewed: 4 August 2026. All prescription medications are dispensed by a GPhC registered UK partner pharmacy.