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

PMS and PMDD are more than hormonal mood swings—they are complex neuroendocrine conditions driven by interactions between sex hormones and neurotransmitters like serotonin, GABA, and cortisol. This article explains the science behind menstrual mood disorders and highlights how advanced hormone and neurotransmitter testing from Hormone Lab UK and ZRT Laboratory can help identify imbalances and guide personalised treatment.

A comprehensive guide to understanding hormone health—from adrenal function and thyroid balance to menopause, andropause, metabolism, and reproductive wellness. Learn how hormonal imbalances develop, how they affect energy, mood, weight, and overall wellbeing, and how modern testing methods like saliva, blood spot, and bioidentical therapies can support personalised health and long-term vitality.

Vitex agnus-castus — also known as chasteberry or chaste tree berry — is one of the most widely used botanical remedies for female hormone imbalance. Clinical research supports its use for reducing elevated prolactin, correcting luteal phase progesterone deficiency, alleviating PMS and PMDD symptoms, and managing some symptoms of the menopausal transition. This article reviews the evidence behind Vitex, explains the hormonal mechanisms through which it works, and outlines when it may be an appropriate botanical option for women with menstrual cycle disturbances.

By Dr. Kate Placzek, ZRT Laboratory Premenstrual Dysphoric Disorder (PMDD) is a severe, cyclical condition that affects an estimated 3–8% of menstruating women. Unlike typical PMS, PMDD causes debilitating mood and physical symptoms in the week before menstruation — symptoms severe enough to interfere with work, relationships, and daily life. If you've been told your symptoms are "just PMS" but they feel far more intense, this guide explains what's really happening hormonally and what you can do about it. Is PMDD Worse than PMS? Yes — Significantly. PMS is common. PMDD is a different level entirely. While PMS involves manageable...

Explore how hormones fluctuate through every stage of the menstrual cycle — from menarche to menopause — and discover how estrogen, progesterone, LH, and FSH influence mood, energy, fertility, PMS, migraines, weight changes, and overall women’s health. Learn how menstrual cycle mapping can help identify hormone imbalances and provide deeper insight into symptoms throughout the month.