Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — cortisol and stress

Estrogen dominance is a common hormone imbalance linked to symptoms such as weight gain, mood swings, heavy periods, fatigue, hot flashes, anxiety, and low libido. Learn the causes of estrogen dominance, how hormone testing works, and natural ways to support hormone balance during reproductive years, perimenopause, and menopause.

Brain Chemistry Balance: When Neurotransmitter Testing Changes Lives - from brain fog to focus, see how tailored insights spark calm, clarity and wellbeing.

The UK is facing a growing obesity crisis, with two-thirds of adults and a rising number of children classified as overweight or obese. A recent UK Parliament briefing highlights alarming trends, including regional and ethnic disparities and increased risks linked to socioeconomic status. While public health strategies continue to evolve, addressing the hormonal root of weight gain may offer a more effective, personalized solution. ZRT Laboratory’s Weight Management Profile helps uncover hidden hormonal imbalances—such as elevated cortisol, low testosterone, or thyroid dysfunction—that contribute to stubborn fat gain, poor metabolism, and increased disease risk.

Saliva hormone testing is one of the most accurate and convenient ways to measure bioavailable hormones — the fraction that is actually active in your body's tissues. Unlike standard blood tests, which measure total hormone levels including protein-bound fractions that cells cannot use, saliva testing captures only the free, unbound hormones that drive real physiological effects. This guide explains how saliva testing works, which hormones it measures, why it is clinically superior for monitoring hormone therapy, and how to choose the right test for your health goals.

Collagen is the primary structural protein responsible for firm, smooth, youthful skin — and its loss is one of the most significant drivers of wrinkles, sagging, and thinning as we age. But collagen loss is not simply an inevitable consequence of getting older. Hormones, stress, nutrition, and lifestyle all play powerful roles in how quickly collagen breaks down and how effectively it is replenished. This article explains the science of collagen and skin ageing, the critical roles of oestrogen and cortisol, and the practical steps you can take to protect your skin from the inside out.