2-OH-E1 (male)

Optimal Result: 0 - 5.9 ng/mg.

2-OH-E1 is considered a ‘good estrogen’ and it does not stimulate cell growth. It can block the action of stronger, potentially carcinogenic estrogens. When it is methylated to 2-Me-E1 it is cancer protective.

2-Hydroxyestrone is an endogenous biomarker and major urinary metabolite of estrone and estradiol. Along with 16α-Hydroxyestrone, 2-Hydroxyestrone is used as an indicator for increased risk of breast cancer. 

This metabolite of Estrone is considered protective. A comparison with 2-Methoxyestrone, its Phase II liver metabolite, may help with assessing adequacy of methylation processes.

The 2:16alpha-Hydroxyestrone ratio appears from the literature to be an important gauge of estrogen metabolism. In general, the higher the ratio, the less association there is with estrogen-dependent diseases such as breast cancer and lupus, and the more likely the person has a beneficial hormone metabolism. A 2:16alpha-hydroxyestrone ratio in serum greater than 0.4 is generally thought to be beneficial. There are numerous modifiers of this value, most of which induce changes in the level of 2-OHE1. These include intake of indole-3-carbinols from cruciferous vegetables, flaxseed, soy, omega-3 fatty acids, and vigorous exercise. All are shown to improve the levels of 2-OHE1 in most individuals. It is to be emphasized that some individuals in clinical studies have exhibited a paradoxical response to treatments that would typically raise the 2-OHE1 levels. Therefore, follow-up testing after treatment is strongly suggested. There may be an increased likelihood of osteoporosis with excessive 2-OHE1 production. It is important to note that the ideal upper limit of 2-OHE1 is not apparent from the existing literature. Attention to bone loss processes in the urine is perhaps warranted in individuals with a very high 2:16alpha-hydroxyestrone ratio.


  • https://www.ncbi.nlm.nih.gov/pubmed/16289388
  • https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2766371
  • www.ncbi.nlm.nih.gov/pubmed/11991791


What does it mean if your 2-OH-E1 (male) result is too high?

High levels of the “good estrogen” are typically considered beneficial; however, when coupled with a low 2-OMe-E1, it may indicate poor methylation activity.

If both 2-OH-E1 and 16a-OHE1 are high, then total estrogen load may be high. Consider methods to better clear the estrogens from the body.

10 000+ happy clients
100% satisfaction
★★★★★ customer support

Understand blood, stool, and urine medical results from your labs.

Get 10% off your plan.

Use promocode

Advanced Plan personal plan

  • Yearly subscription
  • Instant interpretation
  • We upload five reports for you
  • Use the free self-upload form
  • 2500+ biomarkers explained
  • Nutrition Recommendations
  • Online support
  • Cancel anytime

Own It For Life premium personal plan

  • No subscription
  • Unlimited access
  • Unlimited storage
  • Instant interpretations
  • We upload ten reports for you
  • Use the free self-upload form
  • 2500+ biomarkers explained
  • Nutrition Recommendations
  • Dedicated support

Pro Plan for health professionals

  • Track multiple clients results
  • No setup fees
  • No hidden costs
  • Cancel anytime
  • Instant interpretations
  • Use the free template forms
  • 2500+ biomarkers explained
  • Additional team member $25
  • Personal training and support

Healthmatters.io software for professional use.

Welcome to Healthmatters Pro.

Save time on interpreting lab results with the largest database of biomarkers online. In-depth research on any test at your fingertips, all stored and tracked in one place.

Learn More

We implement proven measures to keep your data safe.

At HealthMatters, we're committed to maintaining the security and confidentiality of your personal information. We've put industry-leading security standards in place to help protect against the loss, misuse, or alteration of the information under our control. We use procedural, physical, and electronic security methods designed to prevent unauthorized people from getting access to this information. Our internal code of conduct adds additional privacy protection. All data is backed up multiple times a day and encrypted using SSL certificates. See our Privacy Policy for more details.

General Data Protection Regulation (GDPR). HIPAA compliance for healthcare professionals

Understand Your Lab Result Now

  • Instant interpretation
  • 2500+ biomarkers explained
  • Science-based recommendations
  • Online support
  • Secure and private portal

Get 10% off with promocode: