Estradiol (E2): what your result means.

The primary female sex hormone; regulates menstrual cycle, bone, and heart health. Estradiol (E2) is measured by blood test as part of the Hormonal panel in the HodieLabs Health Blueprint.

Note: this biomarker is measured and interpreted for females; reference ranges are sex-specific.

Why Estradiol (E2) matters

Estradiol varies dramatically across the menstrual cycle. Specify cycle day or menopausal status. In post-menopausal women, estradiol <73 pmol/L is expected; levels above this warrant investigation.

Associated risks when out of range: Bone loss risk (low). Cardiovascular risk (low). Hormonal imbalance (high).

What the clinical evidence shows

The evidence base behind how the HodieLabs Evidence-Based Clinical Library interprets Estradiol (E2), from randomised trials, prospective cohorts and genetic (Mendelian randomisation) studies. Full citations in the reference list below.

• Study of Osteoporotic Fractures (Cummings et al. NEJM 1998): older women with the lowest endogenous estradiol had markedly higher hip and vertebral fracture risk, direct evidence of estradiol's role in lifelong bone integrity.
• Clinical synthesis (Davis et al. Nature Reviews Disease Primers 2015): the menopause transition's estradiol decline drives bone loss, vasomotor symptoms and metabolic shifts. Measured levels contextualise symptoms and therapy decisions.

Evidence-based reference ranges

The HodieLabs Evidence-Based Clinical Library interprets Estradiol (E2) against published clinical authority standards, never arbitrary "optimal" ranges. Measured in pmol/L:

Clinical interpretation

• Estradiol varies dramatically across the menstrual cycle. Specify cycle day or menopausal status.
• In post-menopausal women, estradiol <73 pmol/L is expected; levels above this warrant investigation.
• In men, estradiol is important for bone health. Very low levels increase fracture risk.

What improves it: the evidence-based levers

• Resistance training
• Body composition optimisation
• Medical review (cycle/HRT context)

Recommended testing frequency: Annual, as part of a comprehensive panel. Single markers are always interpreted in context.

How Estradiol (E2) testing works at HodieLabs

Estradiol (E2) is measured in every Health Blueprint at our Melbourne Preventative Health & Longevity Clinic, interpreted by a doctor against the guideline-cited ranges above and tracked over time through your HodieLabs membership.

References

1. Cummings SR, et al. Endogenous hormones and the risk of hip and vertebral fractures among older women. N Engl J Med. 1998;339:733–738.
2. Davis SR, et al. Menopause. Nat Rev Dis Primers. 2015;1:15004.

This page is general information from the HodieLabs Evidence-Based Clinical Library, not medical advice. Speak with your GP about what testing and care is appropriate for you.