Medical vs Direct-to-Consumer Testing
| Feature | Medical Genetic Testing | Direct-to-Consumer (DTC) |
|---|---|---|
| Ordered by | Clinical geneticist/specialist based on family history/symptoms | Purchased directly by consumer online |
| Counselling | Pre- and post-test genetic counselling standard | Usually minimal or absent |
| Clinical validity | High for tested conditions | Variable — ancestry generally reliable; health predictions often limited |
| Actionability | Results guide specific medical decisions | Often limited direct clinical action recommended |
BRCA Testing — A Key Example
BRCA1/2 gene testing is offered to people with significant family history of breast/ovarian cancer (multiple affected relatives, early-onset cases, certain ethnic backgrounds with higher prevalence). Positive results significantly inform risk-reducing strategies (enhanced screening, preventive surgery, medication) but require genetic counselling before and after testing given the profound implications.Limitations of Consumer Genetic Health Tests
- Many health-related claims from DTC tests have limited clinical validity or utility
- Results can cause unnecessary anxiety or false reassurance
- Should not replace appropriate clinical genetic testing when there's a specific medical indication
- Privacy and data security considerations are important
Seek Genetic Counselling for Significant Family HistoryIf you have a strong family history of cancer, heart disease, or other conditions with known genetic components, ask your doctor about referral to genetic counselling services rather than relying solely on consumer testing — this ensures appropriate testing and support for interpreting results.
Should I get a consumer genetic health test?
These can be interesting for ancestry and some limited health insights, but shouldn't replace proper medical genetic testing when there's a clinical indication (strong family history), and results should be discussed with a healthcare professional rather than acted upon independently.
What happens if I test positive for BRCA1/2?
This significantly increases lifetime breast and ovarian cancer risk, and options include enhanced screening (earlier, more frequent mammograms/MRI), risk-reducing medication, or preventive surgery — decisions are highly personal and made with specialist genetic counselling support.
Medical Disclaimer: This page is for general education only and does not replace professional medical advice. Always consult a qualified healthcare provider.