Insights for better health.
Evidence-based articles on biomarkers, longevity, and the science of preventative health — written by the ChXhealth team.
cycleWhy Hormone Testing Day Matters: Cycle Timing Explained
Female hormones change daily across the cycle. The right day for testing makes results interpretable.
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hormonesOestradiol Through Perimenopause: What to Expect
Oestradiol falls and fluctuates through perimenopause. Learn what blood test patterns mean and how to interpret them.
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biomarkersWhat Your Sleep Says About Your Hormones
Poor sleep is both a symptom and a cause of hormonal imbalance. Learn which biomarkers connect to common sleep issues.
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biomarkersTestosterone in men: what your levels actually mean
Testosterone levels in UK men have fallen 20% in 30 years. Here's what your level should be, what affects it, and how to test i...
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biomarkersCortisol and Burnout: What Your Stress Hormone Reveals
Cortisol is your main stress hormone. Chronic elevation drives weight gain, poor sleep, anxiety and fatigue. Learn how a UK blo...
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biomarkersCortisol explained: why the "stress hormone" matters more than you think
Cortisol gets a bad rap, but it's actually one of the most important regulatory chemicals your body produces. Here's how it wor...
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