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In-depth guideBlood tests and biomarkers1,25-Dihydroxy Vitamin D (Calcitriol): Test & MeaningLearn what the 1,25-dihydroxy vitamin D blood test measures, when calcitriol testing is useful, and why 25-hydroxy vitamin D checks stores instead.Updated Aug 24, 202610 minute read

In-depth guideBlood tests and biomarkersCeruloplasmin Blood Test: What the Result Can MeanLearn what ceruloplasmin measures, why copper tests are paired with it, and why one low or high result cannot diagnose a condition.Updated Sep 27, 20266 minute read

In-depth guideBlood tests and biomarkersIgG Blood Test: Total Immunoglobulin G ExplainedLearn what a total IgG blood test measures, how it differs from a germ-specific IgG test, and why low or high results need the matching laboratory range.Updated Sep 30, 20266 minute read

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 guideSupplementsChamomile: Sleep Evidence and SafetyCompare chamomile tea and extracts, newer sleep research and anxiety trials. Understand uncertain benefits, allergies, medicine interactions and pregnancy gaps.Updated Sep 21, 20265 minute read

In-depth guideSupplementsL-Theanine: Sleep, Focus, Dose Evidence & SafetySee what L-theanine trials show for sleep, attention and stress, why caffeine changes the evidence, studied doses, safety limits and product checks.Updated Aug 29, 202616 minute read

In-depth guideSupplementsMelatonin: Dose, Timing, Sleep, Jet Lag & Safety | LongevityMateEvidence-based melatonin guide covering dose and timing, insomnia, jet lag, delayed sleep phase, children, long-term safety, interactions and product quality.Updated Aug 10, 202639 minute read

In-depth guideSupplementsMilk Thistle (Silymarin): Evidence and SafetyUnderstand milk thistle’s liver claims, uncertain clinical benefits and product-quality concerns. See what newer reviews and placebo-controlled trials found.Updated Sep 20, 20265 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 guideSupplementsSt John's Wort: Evidence, Product Differences and InteractionsReview St John’s wort depression evidence, extract differences, serious medicine interactions and safety limits without selecting a treatment or dose.Updated Sep 29, 20265 minute read

In-depth guideSupplementsValerian SupplementsReview valerian sleep evidence, including the difference between perceived and measured improvement, varied preparations and uncertain long-term safety.Updated Sep 10, 20265 minute read

In-depth guideSupplementsNiacin SupplementsCompare niacin forms, understand why better cholesterol numbers did not establish added cardiovascular benefit in statin trials, and review high-dose safety.Updated Sep 9, 20265 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 biomarkersImmunoglobulin A (IgA) Blood Test: Total IgA ExplainedUnderstand total IgA, high and low results, age-specific laboratory ranges, mg/dL versus g/L, and why total IgA differs from celiac antibodies.Updated Sep 29, 20265 minute read

In-depth guideSupplementsCocoa Flavanols: What the Heart Trials Actually FoundA clear look at cocoa flavanol trial findings, modest blood-pressure changes, product differences and why the evidence does not prove cardiovascular prevention.Updated Sep 24, 20268 minute read

In-depth guideSupplementsCollagen Peptides: Skin, Joint and Protein EvidenceA balanced guide to collagen peptides, including conflicting skin evidence, knee osteoarthritis findings, muscle protein limits, product forms, quality checks and safety.Updated Sep 6, 202617 minute read

In-depth guideSupplementsTart Cherry Supplements: Recovery Evidence and LimitsA practical guide to Montmorency tart cherry juice, concentrate and powder, with exercise-recovery trial results, uncertainty, label checks and safety limits.Updated Sep 26, 20268 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

Fresh from the library

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