Randox Health Allergy & intolerance

Genetic Lactose Intolerance Home Test

A saliva-based DNA test for two gene variants (C13910T and G22018A) linked to how well your body produces lactase, for people wanting to understand a genetic basis for dairy-related digestive symptoms.

  • At-home test
Sample
Saliva
Collection
At-home saliva sample, posted to lab
Results in
7–14 days
Biomarkers
2
Tests for
  • C13910T
  • G22018A

Test specifications

Provider
Randox Health
Sample type
saliva
Collection method
at-home saliva sample, posted to lab
Turnaround time
7–14 days
Biomarkers tested
2
At-home test
Yes
Doctor reviewed
No
Gender focus
Both

What's tested

2 biomarkers as listed by Randox Health.

  • C13910T
  • G22018A

About this test

The Genetic Lactose Intolerance Home Test analyses a saliva sample for two variants in the MCM6 gene, C13910T and G22018A, which affect how well the body produces lactase, the enzyme needed to digest lactose. These variants are commonly used to assess a genetic predisposition to lactose intolerance rather than to diagnose it directly, and cutting down on dietary lactose is the usual way to manage symptoms if they occur.

With two biomarkers, this sits in the lower-middle range for clinical depth among the allergy tests we track, reflecting the narrow, specific focus on these two variants. Its value for money score is the strongest of any criterion here: at £108 it costs well under half the £395 median for similarly sized allergy tests in our data, a difference of around 73%.

The listing scores well for clarity and documentation, clearly stating the variants tested, the sample type and the turnaround, though it does not describe what the results report looks like. Results and follow-up scores low because this test is not reviewed by a doctor as standard, while trust signals remain high, reflecting Randox Health's Trustpilot rating of 4.6 from 29,705 reviews, its UKAS ISO 15189 accredited lab and CQC registration.

Who is it for?

This may suit you if you have digestive symptoms after eating dairy, or a family history of lactose intolerance, and want a low-cost, at-home saliva test to check for a genetic basis before making dietary changes. It is a narrow, two-marker test rather than a broad digestive health panel.

There are no specific comparable tests named in our data, but at £108 it is priced well below the typical cost of similarly sized allergy tests we track. If you want a doctor to review your results, this test does not offer that as standard.

How it works

You provide a saliva sample at home using the kit provided and post it to the lab, where it is analysed for the C13910T and G22018A variants in the MCM6 gene. Results are provided within 1 to 2 weeks of the sample arriving at the lab and are not reviewed by a doctor as standard.

Pros & cons

Pros

  • Priced around 73% below the £395 median for similarly sized allergy tests.
  • Saliva-based, so no blood draw or clinic appointment needed.
  • Listing sets out the exact MCM6 variants tested and the turnaround clearly.

Cons

  • Doctor review of results is not included as standard.
  • Tests only two variants rather than a broader digestive or allergy panel.
  • Turnaround of 1 to 2 weeks is slower than some at-home tests.

Our editorial score

Compare Health Test Score Lactose gene test priced well under typical allergy tests
Editorial confidence: 9.0/10

Checking two variants in the MCM6 gene (C13910T and G22018A) associated with lactose intolerance, this saliva test costs £108, well below the typical cost for similarly sized allergy tests we track, making it a comparatively low-cost option in this category. Results are not reviewed by a doctor as standard and turnaround takes 1 to 2 weeks.

Score breakdown

  • Clarity and documentation 9.0/10

    The listing publishes a detailed description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 6.5/10

    2 biomarkers, placing it in the 33rd percentile of allergy tests we track.

  • Collection convenience 7.0/10

    A saliva sample you take at home, no needle; results in around 14 days, slower than similar tests.

  • Results and follow-up 3.0/10

    Results are not doctor-reviewed and no consultation is included; the provider does not describe the report format.

  • Trust signals 9.0/10

    Trustpilot 4.6 from 29,705 reviews; accredited lab (UKAS ISO 15189 (Randox Clinical Laboratory Services, lab 9329)); CQC registered.

  • Value for money 10.0/10

    £108.00 against a median of £395.00 for the 15 similarly sized allergy tests we track (-73%).

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

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