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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.

63 published guidesBrowse the complete library

Illustrated prevention and health risk guide with cardiovascular context

Prevention & Health Risks

Published guides

Prevention & Health Risks

63 results

In-depth guideBlood tests and biomarkers.Lactate Dehydrogenase (LDH) Blood TestLearn what an LDH blood test can and cannot show, why a damaged sample can raise the result, and how specimen type and laboratory intervals affect interpretation.Updated 10 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Potassium Blood Test: Low, High and What Results MeanLearn what a potassium blood test measures, how to read low or high results, and why the report range, unit, specimen, method and surrounding tests matter.Updated 4 Sept 202614 minute read

In-depth guideBlood tests and biomarkers.Transferrin Saturation: Formula, Low & High ResultsUnderstand the transferrin saturation formula, why ferritin and inflammation matter, common low and high patterns, sample variation, and sensible follow-up.Updated 28 Aug 202615 minute read

In-depth guideSupplementsSelenium Supplements: Benefits, Dose, Food Sources and SafetyA careful selenium guide covering essential functions, food variability, studied doses, cancer and thyroid evidence, US and European upper limits, interactions and toxicity signs.Updated 4 Sept 202616 minute read

In-depth guideSupplementsZinc supplements: benefits, dosage, forms and copper safetyA practical zinc guide covering deficiency, colds, elemental dose, forms, copper depletion, interactions, blood tests and who should avoid high doses.Updated 8 Aug 202624 minute read

In-depth guideBlood tests and biomarkers.Calprotectin Stool TestUnderstand stool calprotectin as an intestinal inflammation marker, with a named laboratory example, sample guidance and clear limits on diagnosing IBD.Updated 13 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Anion Gap Blood Test: Formula, High & Low ResultsUnderstand the anion gap formula, why laboratory ranges differ, what high or low results can mean, and why electrolytes, albumin and symptoms matter.Updated 27 Aug 202613 minute read

In-depth guideBlood tests and biomarkers.Apolipoprotein A1 (ApoA1): Test & MeaningUnderstand ApoA1, how it differs from HDL cholesterol, why a low result needs context, and how ApoB and the full lipid profile complete interpretation.Updated 30 Aug 202615 minute read

In-depth guideBlood tests and biomarkers.BNP Blood Test: What BNP and NT-proBNP Can Tell YouUnderstand BNP and NT-proBNP results, why high or low values need context, and which report details matter. Evidence-led, without a diagnosis from one number.Updated 24 Sept 20267 minute read

In-depth guideBlood tests and biomarkers.C-Peptide Blood Test: Meaning, Units and ContextUnderstand what a C-peptide result says about your body's own insulin production, and why glucose, timing, kidney function, medicines and the assay matter.Updated 3 Sept 202616 minute read

In-depth guideBlood tests and biomarkers.C-reactive protein (CRP and hs-CRP): what your result meansUnderstand high and low CRP results, CRP versus hs-CRP, units, laboratory ranges, causes, repeat testing and cardiovascular context.Updated 2 Aug 202614 minute read

In-depth guideBlood tests and biomarkers.Cystatin C Blood Test: eGFR, Results & LimitationsUnderstand cystatin C, combined creatinine-cystatin C eGFR, factors that can distort results, and how kidney function is assessed with trends and urine albumin.Updated 28 Aug 202615 minute read

In-depth guideBlood tests and biomarkers.Bicarbonate (Total CO₂): High & Low ResultsLearn why chemistry-panel total CO₂ mostly reflects bicarbonate and how anion gap, kidneys, breathing and sample handling explain high or low results.Updated 30 Aug 202616 minute read

In-depth guideBlood tests and biomarkers.Reticulocyte CountUnderstand a reticulocyte count, its percentage and absolute units, and why a result inside the laboratory range may still need context when you have anaemia.Updated 9 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.ALT Blood Test: High, Low, Ranges & What It MeansUnderstand an ALT blood test, why ranges vary, what high or low ALT can mean, U/L and µkat/L conversion, confounders and safe next steps.Updated 15 Aug 202618 minute read

In-depth guideBlood tests and biomarkers.Serum Folate Blood TestUnderstand serum folate, laboratory-specific cutoffs and red-cell testing. Learn how meals, supplements and vitamin B12 affect the meaning of your result.Updated 21 Sept 20265 minute read

In-depth guideBlood tests and biomarkers.Zinc Blood TestUnderstand serum and plasma zinc results, laboratory ranges and sampling effects. Learn why inflammation, meals and supplements change the meaning of a number.Updated 22 Sept 20265 minute read

In-depth guideSupplementsVitamin A: Benefits, Dose, Retinol, Beta-Carotene & Safety | LongevityMateEvidence-based vitamin A guide covering retinol vs beta-carotene, dose and IU conversion, pregnancy, smokers, toxicity, deficiency, food, forms and testing.Updated 10 Aug 202638 minute read

In-depth guideBlood tests and biomarkers.24-Hour Urine Protein: Test & ResultsUnderstand total protein in a 24-hour urine collection, how it differs from albumin and UACR, collection errors and what high results can mean.Updated 31 Aug 202614 minute read

In-depth guideBlood tests and biomarkers.Methylmalonic Acid (MMA) TestUnderstand methylmalonic acid as a vitamin B12 marker. See why kidney function, specimen type, laboratory ranges and recent supplements matter.Updated 13 Sept 20265 minute read

In-depth guideSupplementsAlpha-Lipoic Acid: Neuropathy Evidence, Forms, Dose & SafetyEvidence-graded alpha-lipoic acid guide covering oral versus IV neuropathy evidence, studied doses, metabolic claims, R-ALA limits, interactions, side effects and high-risk groups.Updated 3 Sept 202616 minute read

In-depth guideSupplementsPsyllium: Benefits, Dose, Cholesterol & Safety | LongevityMateEvidence-based psyllium guide covering constipation, LDL and ApoB, blood sugar, dose, water, timing, interactions, forms, pregnancy and side effects.Updated 10 Aug 202632 minute read

In-depth guideBlood tests and biomarkers.11-Deoxycortisol (Compound S): Test, Range & MeaningUnderstand what an 11-deoxycortisol blood test measures, why baseline, ACTH and metyrapone results differ, and how to interpret the result safely.Updated 24 Aug 202611 minute read

In-depth guideBlood tests and biomarkers.Creatine Kinase (CK) Blood TestUnderstand a creatine kinase blood result, why exercise and timing matter, and how CK differs from creatinine. Read laboratory ranges with the right context.Updated 10 Sept 20265 minute read

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