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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 biomarkersLactate 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 Sep 10, 20265 minute read

In-depth guideBlood tests and biomarkersPotassium 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 Sep 4, 202614 minute read

In-depth guideBlood tests and biomarkersTransferrin 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 Aug 28, 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 Sep 4, 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 Aug 8, 202624 minute read

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

In-depth guideBlood tests and biomarkersAnion 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 Aug 27, 202613 minute read

In-depth guideBlood tests and biomarkersApolipoprotein 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 Aug 30, 202615 minute read

In-depth guideBlood tests and biomarkersBNP 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 Sep 24, 20267 minute read

In-depth guideBlood tests and biomarkersC-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 Sep 3, 202616 minute read

In-depth guideBlood tests and biomarkersC-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 Aug 2, 202614 minute read

In-depth guideBlood tests and biomarkersCystatin 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 Aug 28, 202615 minute read

In-depth guideBlood tests and biomarkersBicarbonate (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 Aug 30, 202616 minute read

In-depth guideBlood tests and biomarkersReticulocyte 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 Sep 9, 20265 minute read

In-depth guideBlood tests and biomarkersALT 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 Aug 15, 202618 minute read

In-depth guideBlood tests and biomarkersSerum 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 Sep 21, 20265 minute read

In-depth guideBlood tests and biomarkersZinc 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 Sep 22, 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 Aug 10, 202638 minute read

In-depth guideBlood tests and biomarkers24-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 Aug 31, 202614 minute read

In-depth guideBlood tests and biomarkersMethylmalonic Acid (MMA) TestUnderstand methylmalonic acid as a vitamin B12 marker. See why kidney function, specimen type, laboratory ranges and recent supplements matter.Updated Sep 13, 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 Sep 3, 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 Aug 10, 202632 minute read

In-depth guideBlood tests and biomarkers11-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 Aug 24, 202611 minute read

In-depth guideBlood tests and biomarkersCreatine 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 Sep 10, 20265 minute read

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