Health Library

    Practical reads on nutrition, supplements, and health data.

    Short, evidence-aware articles — written to be useful, not overwhelming.

    Routines & Daily Habits

    Morning routines: what’s worth doing, and what’s overhyped

    Which morning habits are actually worth the effort, which are overhyped, and a simple, low-pressure way to build a routine that fits your day.

    June 21, 2026· 5 min read
    Labs & Biomarkers

    Understanding lab reference ranges

    What a lab reference range is, how labs build it from the middle ~95% of healthy results, why ranges vary, and why out-of-range isn't a diagnosis.

    June 20, 2026· 5 min read
    Labs & Biomarkers

    Common blood markers, explained

    A plain-language guide to common blood markers — what the CBC, metabolic panel, and lipid markers generally measure, with interpretation left to clinicians.

    June 20, 2026· 4 min read
    Labs & Biomarkers

    What a ferritin test measures

    What a ferritin test measures — iron stored in the body — how it differs from a serum iron test, why its range is wide, and why clinicians read it in context.

    June 20, 2026· 4 min read
    Labs & Biomarkers

    What's in a cholesterol panel

    What a cholesterol (lipid) panel measures — total cholesterol, LDL, HDL, and triglycerides — in plain language, with interpretation left to clinicians.

    June 20, 2026· 5 min read
    Labs & Biomarkers

    HbA1c vs a single glucose reading

    How an HbA1c test differs from a single glucose reading — average blood sugar over ~2–3 months vs a moment in time — in plain language.

    June 20, 2026· 5 min read
    Labs & Biomarkers

    Understanding vitamin D blood levels

    What a vitamin D blood test measures — 25(OH)D — why experts debate the 'optimal' level, and why your result is read in context by a clinician.

    June 20, 2026· 4 min read
    Privacy & Health Data

    Is your health app covered by HIPAA? (Usually not.)

    Many people assume a health app is protected by HIPAA. Most consumer apps are not. Here is what actually governs the data you enter — and what that means for you.

    June 19, 2026· 7 min read
    Privacy & Health Data

    How health data gets shared and sold — and what to look for

    Health data moves to third parties in ways most people never see. A plain-language guide to how sharing and selling work — and how to evaluate an app before you trust it.

    June 19, 2026· 8 min read
    Supplement Basics

    How much is too much? Upper limits and fat-soluble vitamins

    More is not always better with supplements. A clear look at tolerable upper intake levels, why fat-soluble vitamins behave differently, and how doses can stack without you noticing.

    June 19, 2026· 8 min read
    Supplement Basics

    Supplement safety: interactions, dosing, and the "natural" myth

    Supplements aren't automatically safe. A plain-English guide to drug interactions, dosing limits, surgery precautions, and why "natural" doesn't mean risk-free.

    June 17, 2026· 8 min read
    Skincare Basics

    What cosmetic label terms like "hypoallergenic" and "natural" mean

    A label-literacy guide to cosmetic marketing words — hypoallergenic, natural, clean, fragrance-free, non-comedogenic — and which have no legal definition.

    June 16, 2026· 6 min read
    Skincare Basics

    How to read a sunscreen's Drug Facts label

    A label-literacy guide to the Drug Facts panel on US sunscreens — active ingredients, SPF, broad spectrum, water resistance, and where each term is defined.

    June 16, 2026· 6 min read
    Nutrition Foundations

    Building a balanced plate

    A general overview of the balanced-plate idea using USDA MyPlate proportions: produce, grains, and protein foods, plus dairy and water.

    June 15, 2026· 5 min read
    Nutrition Foundations

    How to read a Nutrition Facts label

    A general guide to reading the U.S. Nutrition Facts label — serving size, calories, % Daily Value (the 5/20 rule), added sugars, sodium, and trans fat.

    June 15, 2026· 6 min read
    Nutrition Foundations

    Dietary fiber: types and food sources

    A general overview of dietary fiber: soluble vs. insoluble types, where each is found in food, and how fiber appears on the Nutrition Facts label.

    June 15, 2026· 5 min read
    Nutrition Foundations

    Hydration basics: water, fluids, and everyday needs

    A general overview of how the body's fluid needs work: the '8 glasses' rule of thumb, water from food, and everyday hydration cues.

    June 15, 2026· 5 min read
    Nutrition Foundations

    Whole vs. processed foods: a practical lens

    A general overview of food processing as a spectrum, a four-group framework, and why the ingredient list matters more than front-of-package claims.

    June 15, 2026· 6 min read
    Nutrition Foundations

    Food and everyday energy

    A general overview of how food relates to everyday energy — calories and macronutrients, plus non-food factors like sleep, activity, and hydration.

    June 15, 2026· 5 min read
    Skincare Basics

    Is it a cosmetic or a drug? How to tell from the label

    How US law sorts everyday personal-care products into cosmetics, OTC drugs, or both — and how a Drug Facts panel signals the difference.

    June 12, 2026· 5 min read
    Skincare Basics

    How to read a skincare ingredient list (INCI)

    A general guide to cosmetic ingredient lists: INCI names, the descending-order rule, Drug Facts panels, and what a label can and can't tell you.

    June 11, 2026· 5 min read
    Nutrition Foundations

    Macronutrients: protein, carbohydrates, and fat

    Protein, carbohydrates, and fat are the three macronutrients. A general look at what each is, where it appears in food, and how to read them on a label.

    June 11, 2026· 7 min read
    Nutrition Foundations

    Vitamin D: forms and food sources

    Vitamin D comes in two main forms and a short list of foods. A general overview of D2 vs D3, where it shows up in food, and what labels mean.

    June 7, 2026· 7 min read
    Nutrition Foundations

    Omega-3s (EPA and DHA): food sources

    Omega-3s come in several types — ALA, EPA, and DHA. A general guide to the food sources of each and how to read an omega-3 label.

    June 7, 2026· 7 min read
    Supplement Basics

    Probiotics: what the label actually means

    Probiotic labels list strains, CFUs, and storage rules that most shoppers skip. A plain-English guide to reading one without the hype.

    June 7, 2026· 7 min read
    Nutrition Foundations

    Iron: forms and absorption

    Iron comes as heme and non-heme, and absorption varies a lot. A general overview of iron forms, food sources, and absorption basics.

    June 7, 2026· 7 min read
    Nutrition Foundations

    Vitamin B12: food sources

    Vitamin B12 is found almost entirely in animal foods, which makes food sources worth understanding. A general overview and label notes.

    June 7, 2026· 6 min read
    Supplement Basics

    Third-party testing explained: USP, NSF, and what the seals mean

    Supplements aren't pre-approved like drugs, so third-party testing marks matter. A guide to USP, NSF, and Informed Sport — and their limits.

    June 7, 2026· 6 min read
    Nutrition Foundations

    What is a nutrient gap, and why it matters

    A nutrient gap is the everyday distance between what your body needs and what your meals reliably provide. Here's why it matters.

    May 8, 2026· 6 min read
    Supplement Basics

    Reading a supplement label: what to look for

    Serving size, ingredient form, % Daily Value, and the small print most people skip — a calm, practical guide to label literacy.

    May 6, 2026· 7 min read
    Nutrition Foundations

    The case for food-first nutrition

    Most nutrition wins come from food, not capsules. Here's what 'food-first' really means and how to apply it without overthinking.

    May 3, 2026· 6 min read
    Supplement Basics

    When supplements help (and when they don't)

    Supplements are useful in some situations and pointless in others. A practical framework for telling the difference.

    April 29, 2026· 7 min read
    Nutrition Foundations

    Protein needs across life stages

    Protein needs shift over time — adolescence, adulthood, pregnancy, midlife, and older age each have different priorities.

    April 25, 2026· 7 min read
    Supplement Basics

    Magnesium: forms, absorption, and timing

    Magnesium forms vary widely in absorption and tolerability. A general overview of common forms, how they're used, and timing.

    April 21, 2026· 7 min read
    Privacy & Health Data

    The role of consent in modern health apps

    Consent in health apps is more than a checkbox. A clear-eyed look at what real consent should look like — and what to watch for.

    April 17, 2026· 7 min read