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Understand food and metabolism

Connect nutrition with the health signals that matter

Explore dietary patterns, glucose, body composition, nutrients and metabolic markers through practical, evidence-linked guides.

41 published guidesBrowse the complete library

Illustrated nutrition and metabolic health guide with glucose context

Nutrition & Metabolic Health

Published guides

Nutrition & Metabolic Health

41 results

In-depth guideBlood tests and biomarkers24-Hour Urine Creatinine: Test & ResultsUnderstand a 24-hour urine creatinine result, collection accuracy, units, creatinine clearance and why muscle mass and kidney context matter.Updated Aug 31, 202613 minute read

In-depth guideBlood tests and biomarkersBUN Blood Test: High, Low & Kidney ContextUnderstand blood urea nitrogen (BUN), why hydration and protein affect it, and how creatinine, eGFR, urine albumin and trends clarify a result.Updated Aug 29, 202614 minute read

In-depth guideBlood tests and biomarkersNon-HDL Cholesterol: Formula, Goals & MeaningCalculate non-HDL cholesterol, understand which particles it represents, and interpret goals with LDL, triglycerides, ApoB and overall cardiovascular risk.Updated Aug 29, 202615 minute read

In-depth guideBlood tests and biomarkersSodium Blood Test: Low, High and What Results MeanLearn how a sodium blood test reflects water balance, why your report interval matters, and how low or high results fit symptoms, medicines and other tests.Updated Sep 4, 202613 minute read

In-depth guideSupplementsFolate & Folic Acid: Benefits, Dose, MTHFR & Safety | LongevityMateEvidence-based guide to folate and folic acid: pregnancy, deficiency, MTHFR, methylfolate, dose, food sources, interactions, B12 safety and testing.Updated Aug 10, 202634 minute read

In-depth guideSupplementsVitamin B6: Benefits, Safe Dose, P-5-P & Toxicity | LongevityMateEvidence-based vitamin B6 guide covering who benefits, safe dose, pyridoxine versus P-5-P, neuropathy, pregnancy nausea, interactions, testing and food.Updated Aug 10, 202631 minute read

In-depth guideBlood tests and biomarkersDHEA-S Blood Test: Meaning, Age and Clinical ContextLearn what a DHEA-S result can show about adrenal androgen production, why age, sex, assay and symptoms matter, and why a result cannot diagnose a condition by itself.Updated Sep 4, 202614 minute read

In-depth guideSupplementsGinger SupplementsReview ginger evidence by symptom, including pregnancy nausea and motion sickness, with study limitations, preparation differences and supplement safety.Updated Sep 9, 20265 minute read

In-depth guideSupplementsWhey Protein Isolate: Benefits, Labels and Milk AllergyAssess whey protein isolate for convenience and training, compare powder with protein weight, and understand lactose, milk allergy and kidney-disease limits.Updated Sep 8, 20265 minute read

In-depth guideBlood tests and biomarkersPTH Blood Test: Meaning, Calcium and Kidney ContextUnderstand what a parathyroid hormone result can show, why it belongs with calcium and related tests, and how primary, secondary and kidney-related patterns differ.Updated Sep 4, 202614 minute read

In-depth guideSupplements2'-Fucosyllactose (2'-FL): Evidence, Safety & Doses StudiedWhat 2'-fucosyllactose is, what adult trials actually found, how pure 2'-FL differs from HMO mixtures, and what remains uncertain about benefits and safety.Updated Aug 24, 202612 minute read

In-depth guideSupplementsBiotin SupplementsReview the evidence for biotin hair and nail supplements, understand mcg versus mg, and learn why the laboratory needs to know about biotin before blood tests.Updated Sep 8, 20265 minute read

In-depth guideSupplementsAcacia Fiber: Gut Evidence, Dose & SafetyUnderstand acacia fiber and gum arabic, bowel and glucose evidence, doses studied, gradual use, side effects and product-quality limits.Updated Sep 2, 202614 minute read

In-depth guideSupplementsCholine BitartrateUnderstand choline bitartrate labels, nutritional needs and memory claims, with human study limits and a balanced explanation of TMAO and supplement safety.Updated Sep 8, 20265 minute read

In-depth guideSupplementsInositol for PCOS: what myo-inositol and D-chiro-inositol evidence supportsAn evidence-graded guide to myo-inositol and D-chiro-inositol for PCOS, including metabolic signals, fertility uncertainty, pregnancy boundaries, quality and safety.Updated Sep 3, 202624 minute read

In-depth guideSupplementsProbiotics: Strains, Benefits, CFU & SafetyChoose probiotics by strain and purpose, not CFU alone. See evidence limits, label checks, storage, side effects and when live microbes need medical advice.Updated Aug 29, 202617 minute read

In-depth guideSupplementsVitamin B12 supplements: benefits, dosage, forms and blood testsAn evidence-based vitamin B12 guide covering deficiency, blood tests, doses, methylcobalamin versus cyanocobalamin, injections, interactions and who needs care.Updated Aug 9, 202625 minute read

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Healthy Aging Foundations8 guides

Tests, Biomarkers & Tracking66 guides

Movement & Fitness5 guides

Sleep & Recovery6 guides

Brain, Stress & Wellbeing10 guides

Prevention & Health Risks63 guides

Supplements & Longevity Interventions65 guides

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