Understand risk early
Turn health signals into better prevention questions
Learn how screening results, family history, trends and common risk signals fit together—and when professional follow-up matters.
21 published guidesBrowse the complete library
Prevention & Health RisksPublished guides
Prevention & Health Risks
21 results
Quick guideBlood tests and biomarkersHow to read blood work without panicStart with units, ranges, trends and the wider pattern.
Quick guideBlood tests and biomarkersComplete blood count (CBC)Read red cells, white cells and platelets as a connected panel.
Quick guideBlood tests and biomarkersComprehensive metabolic panel (CMP)Put glucose, electrolytes, kidney, liver and protein markers in context.
Quick guideBlood tests and biomarkersCreatinine and eGFRUnderstand kidney estimates alongside hydration, muscle and prior results.
Quick guideBlood tests and biomarkersALT and AST liver enzymesReview liver enzymes with symptoms, medicines, training and repeat testing.
In-depth guideBlood tests and biomarkersTSH thyroid testDeep guide to TSH ranges, high and low results, free T4 patterns, testing and practical next steps.21 min read
In-depth guideBlood tests and biomarkersHemoglobin A1c (HbA1c)Deep guide to A1C ranges, units, testing, false results and practical next steps.19 min read
Quick guideBlood tests and biomarkersCGM glucose spikesSeparate one glucose rise from a repeated pattern worth investigating.
Quick guideBlood tests and biomarkersFerritin and ironRead iron stores with blood count, symptoms and clinical context.
Quick guideBlood tests and biomarkersVitamin D blood testCheck the measured form, units, range and personal context.In-depth guideBlood tests and biomarkersApolipoprotein B (ApoB)Deep guide to ApoB ranges, risk context, testing, causes and evidence-based next steps.17 min read
Quick guideBlood tests and biomarkersApoB versus LDL cholesterolCompare particle-related and cholesterol-related cardiovascular signals.
In-depth guideBlood tests and biomarkersLipoprotein(a)Deep guide to Lp(a) levels, units, inherited risk, testing and evidence-based next steps.18 min read
Quick guideWearable devices and notificationsApple Watch Vitals outliersReview an outlier against your baseline, symptoms and recent changes.
Quick guideWearable devices and notificationsApple Watch high or low heart-rate notificationWhat the notification can mean and when to seek qualified care.
Quick guideWearable devices and notificationsApple Watch hypertension notificationTreat a notification as a prompt for appropriate follow-up, not a diagnosis.
Quick guideWearable devices and notificationsApple Watch irregular-rhythm notificationUnderstand the boundary between screening signals and clinical assessment.
Quick guideWearable devices and notificationsApple Watch inconclusive ECGWhy a recording can be inconclusive and what context to check.
Quick guideWearable devices and notificationsApple Watch AFib History percentageRead the percentage as a trend within the feature's limitations.
Quick guideWearable devices and notificationsApple Watch sleep-apnea notificationUse the alert to prepare a better conversation with a qualified professional.
Quick guideSleep, fitness and recovery signalsResting heart rateCompare sustained movement from baseline with symptoms and recent changes.Explore more
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