Health test guides
Plain-English explainers of the biomarkers behind UK private blood tests — what each one measures, why it matters, and how to compare providers with confidence.
Hormones
Testosterone Test
Total and free testosterone, SHBG, and what the numbers typically mean.
Read guideLow Testosterone Symptoms
What low testosterone can feel like — and when a test is worth considering.
Read guideCortisol Test
Your body's primary stress hormone — and how it's typically measured.
Read guideThyroid Test
TSH, FT4, FT3 and thyroid antibodies — what each marker actually tells you.
Read guideFemale Hormone Test
Oestradiol, progesterone, LH, FSH, AMH and prolactin — what each measures.
Read guideVitamins & Minerals
Organ Health
Liver Function Test
What ALT, AST, ALP, GGT and bilirubin actually measure.
Read guideKidney Function Test
Creatinine, eGFR, urea and electrolytes — the standard kidney markers.
Read guideGlobulin Blood Test
Alpha, beta and gamma globulins — what they measure and what the numbers typically suggest.
Read guideInflammation & Immunity
General
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