Ordering the Breast Cancer Risk: Estrogen 2/16 Ratio Test Basic
This lab test measures the balance between two estrogen breakdown products, 2-hydroxyoestrogen and 16-alpha-hydroxyoestrone, which can help identify patterns linked to breast and other hormone-related cancers. Interestingly, research shows that a higher 2/16 ratio may be linked to a lower risk of certain hormone-driven cancers, making this test useful for those monitoring hormone metabolism.
Ordering this test provides:
- Clear measurement of estrogen breakdown products in urine
- Insight into hormone metabolism and detoxification pathways
- Data to support decisions about hormone therapy or supplements
- Information to help address symptoms like breast tenderness or irregular periods
- Support for evaluating risk factors for hormone-related cancers
Who Should Consider Estrogen Metabolite Ratio Testing
People who have a family history of breast cancer, experience persistent breast tenderness, or are considering hormone therapy may benefit from this test. For example, someone who has noticed changes in their menstrual cycle and is concerned about hormone balance may want to check their estrogen metabolite levels to better understand their risk factors.
Ordering this test may also be helpful for:
- People with unexplained fatigue and mood swings
- Those experiencing hot flashes or night sweats during menopause
- Anyone with a history of hormone-sensitive cancers in the family
- People with ongoing weight gain and difficulty losing weight
- Someone with chronic inflammation who wants to see if estrogen metabolism is playing a role
This test can help identify hormone imbalances that may affect bone strength, cardiovascular risk, and response to hormone therapy. Delaying this test could mean missing early changes in estrogen metabolism that are easier to address when caught sooner.
How to Prepare for Estrogen Metabolite Urine Testing
Fasting is not required for this urine-based test, so you can collect your sample at any time of day. Always follow the specific instructions provided by your doctor or healthcare professional to make sure your sample is collected and shipped correctly.
Labs Included When Ordering Your Breast Cancer Risk: Estrogen 2/16 Ratio Test Basic
| Test Name | Reference Range | What This Biomarker Means | Low and High Levels of Breast Cancer Risk: Estrogen 2/16 Ratio Test Basic |
|---|---|---|---|
| 2-Hydroxyoestrogen (2-OHE) | 4.0 – 15.0 | 2-OHE is a breakdown product of estrogen that is considered less active and less likely to stimulate cell growth. Measuring this helps assess how your body processes estrogen. |
High levels mean your body is favoring a pathway that produces less active estrogen metabolites.
Low levels mean your body may be producing more active or potentially harmful estrogen metabolites. |
| 16-Alpha-Hydroxyoestrone (16-alpha-OHE 1) | 2.0 – 8.0 | 16-alpha-OHE 1 is a more active estrogen metabolite that can stimulate cell growth. Tracking this helps evaluate risk for hormone-driven conditions. |
High levels mean your body is producing more active estrogen metabolites, which may increase risk for hormone-sensitive cancers.
Low levels mean your body is producing fewer active estrogen metabolites. |
| 2-OHE/16-Alpha-OHE 1 Ratio | 1.5 – 3.0 | This ratio compares the amounts of protective and active estrogen metabolites. A higher ratio is generally considered more favorable for reducing risk. |
High levels mean your body is favoring the production of protective estrogen metabolites.
Low levels mean your body is producing more active estrogen metabolites, which may increase risk. |
| Creatinine | 0.3 – 3.0 | Creatinine is used to correct for urine concentration, making sure the estrogen metabolite results are accurate and comparable. |
High levels mean your urine is more concentrated, which can affect test results.
Low levels mean your urine is more diluted, which can also affect test results. |
Reference ranges may change slightly as labs update their methods and guidelines.
Breast Cancer Risk: Estrogen 2/16 Ratio Test Basic FAQ
Is there Breast Cancer Risk: Estrogen 2/16 Ratio Test Basic testing near me?
This is a urine test kit that you can collect at home and send to the lab, with draw locations listed at the top of the page. For people tracking hormone changes or breast tenderness, having a local collection option makes it easier to get tested without delay.
How do I interpret the test results?
While your treating physician should review your results, you can also use our one-on-one test results review service for a detailed explanation from our clinical team.
What is the cost of the test?
The price shown includes standard shipping to you and return shipping to the lab, but draw fees may apply. Ordering this test can help you address hormone-related symptoms sooner and support more targeted treatment.
How often should I retest?
Retesting every 6 to 12 months is recommended, especially if you are starting or changing hormone therapy, or monitoring changes in symptoms. Regular testing helps track how your estrogen metabolism responds to treatment or lifestyle changes.
How accurate is the test?
This test uses high-performance liquid chromatography with tandem mass spectrometry (LC-MS/MS), which provides a specificity of 98% and sensitivity of 97%. TrueHealthLabs.com partners with CLIA-certified and CAP-certified laboratories to uphold rigorous testing standards for dependable results.
Important Notes
READ: These tests are available for European countries only.
Medical Review Board
Reviewed by Jeff Donohue M.D. from Body Logic and Brady Hurst DC, CCCN. Written by True Health Lab’s team of editorial health contributors.
Disclaimer: This information is for educational purposes only and not intended as medical advice. Consult your healthcare provider for personalized guidance.
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