Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — Estradiol

A landmark study published in Nature confirmed what Dr. John Lee and Dr. David Zava argued over a decade ago: natural progesterone — unlike synthetic progestins — can slow or even shrink ER+/PR+ breast cancer tumours. This article explains the receptor science behind the findings and what it means for women’s hormone health.

Hormonal contraception suppresses ovarian function, which means saliva and blood spot hormone test results will appear artificially low — but this doesn’t mean hormone levels at the tissue level are low. This guide explains how to interpret hormone test results correctly when using the pill, patch, ring or IUD, and when to collect your sample for the most meaningful data.

Prostate cancer takes years to develop from a normal cell to a detectable tumour — which means there is a meaningful window for prevention. Three key risk factors are both testable and modifiable: BPA exposure, arsenic accumulation, and catechol oestrogen imbalance. This article explains how each one works and what men can do about it.

Hot flashes and night sweats affect up to 80% of women during perimenopause — but they are not inevitable, and they are not forever. The root cause is hormonal imbalance, particularly the out-of-sync fluctuation of oestrogen and progesterone as the ovaries begin to wind down. Discover the lifestyle changes, natural supplements and hormone testing strategies that can bring real relief.

Perimenopause is far more than a reproductive transition — it is fundamentally neurological. As oestradiol declines, the brain’s bioenergetic system becomes compromised, neurotransmitter balance shifts, and the thermoneutral zone narrows, giving rise to hot flashes, mood instability, memory changes and sleep disruption. This article explores the neuroscience behind the menopausal transition and why hormone replacement therapy — timed correctly — may be the most effective intervention.