PlainVitamins: analyses and guideshttps://plainvitamins.com/Analyses and guides built on the NIH Dietary Supplement Label Database.en-us Supplement labels above the adult upper limit, nutrient by nutrienthttps://plainvitamins.com/research/labels-above-the-upper-limithttps://plainvitamins.com/research/labels-above-the-upper-limitWhich nutrients most often pass the adult Tolerable Upper Intake Level at the most servings a label allows, and on which products.Wed, 07 Oct 2026 00:00:00 GMT How supplement amounts compare with the Daily Valuehttps://plainvitamins.com/research/the-market-dose-maphttps://plainvitamins.com/research/the-market-dose-mapFor each nutrient with an FDA Daily Value: the amount the typical product lists per serving, and how many products give five times the DV or more.Wed, 07 Oct 2026 00:00:00 GMT Proprietary blends: how many supplement labels do not disclose their amountshttps://plainvitamins.com/research/proprietary-blendshttps://plainvitamins.com/research/proprietary-blendsHow many products list a proprietary blend whose ingredient amounts are not disclosed, by product type and by brand.Wed, 07 Oct 2026 00:00:00 GMT Vitamin D amounts on supplement labels, by yearhttps://plainvitamins.com/research/vitamin-d-amounts-by-yearhttps://plainvitamins.com/research/vitamin-d-amounts-by-yearHow the amount of vitamin D per serving has moved on labels entered into the NIH database each year since 2011.Wed, 07 Oct 2026 00:00:00 GMT Which forms of magnesium, B12, folate and other nutrients supplements usehttps://plainvitamins.com/research/forms-in-the-markethttps://plainvitamins.com/research/forms-in-the-marketOxide or glycinate, cyanocobalamin or methylcobalamin: how many products list each form of twelve nutrients, and at what amounts.Wed, 07 Oct 2026 00:00:00 GMT Gummies, tablets, capsules: how amounts differ by physical formhttps://plainvitamins.com/research/amounts-by-physical-formhttps://plainvitamins.com/research/amounts-by-physical-formThe median amount per serving of ten common nutrients in gummies, tablets, capsules, softgels, liquids and powders.Wed, 07 Oct 2026 00:00:00 GMT One formula, many brand names: identical supplement labelshttps://plainvitamins.com/research/one-formula-many-brandshttps://plainvitamins.com/research/one-formula-many-brandsFormulas that appear with the same ingredients in the same amounts under several brand names in the label database: identical label formulas, which do not by themselves show a common maker.Wed, 07 Oct 2026 00:00:00 GMT Third-party seals on supplement labels: how many carry whichhttps://plainvitamins.com/research/seals-on-supplement-labelshttps://plainvitamins.com/research/seals-on-supplement-labelsHow many products print a USP, NSF, Informed Sport, organic, vegan or gluten-free seal, and where to check one.Wed, 07 Oct 2026 00:00:00 GMT Prenatal vitamins against the pregnancy Daily Valueshttps://plainvitamins.com/research/prenatal-labels-and-pregnancy-daily-valueshttps://plainvitamins.com/research/prenatal-labels-and-pregnancy-daily-valuesWhich nutrients prenatal products list, and how many reach the FDA Daily Value for pregnancy in one serving.Wed, 07 Oct 2026 00:00:00 GMT The NIH supplement label database in numbershttps://plainvitamins.com/research/the-supplement-label-database-in-numbershttps://plainvitamins.com/research/the-supplement-label-database-in-numbersLabels, products, brands and ingredients in the NIH Dietary Supplement Label Database, and how many entered and left the market each year.Wed, 07 Oct 2026 00:00:00 GMT How to read a Supplement Facts labelhttps://plainvitamins.com/guides/how-to-read-supplement-labelshttps://plainvitamins.com/guides/how-to-read-supplement-labelsServing size, amount per serving, %DV, blends, other ingredients and the statements around the panel, with how often each appears.Wed, 07 Oct 2026 00:00:00 GMT The %DV and the upper limit: what the two numbers meanhttps://plainvitamins.com/guides/understanding-supplement-labelshttps://plainvitamins.com/guides/understanding-supplement-labelsWhat the Daily Value is, what the Tolerable Upper Intake Level is, and how far typical labels go past each.Wed, 07 Oct 2026 00:00:00 GMT Comparing two supplements with datahttps://plainvitamins.com/guides/comparing-supplements-with-datahttps://plainvitamins.com/guides/comparing-supplements-with-dataSame measure, same serving, the per-day amount, the closest formulas: how to put two labels side by side fairly.Wed, 07 Oct 2026 00:00:00 GMT Comparing supplement brands by their labelshttps://plainvitamins.com/guides/how-to-compare-supplement-brandshttps://plainvitamins.com/guides/how-to-compare-supplement-brandsWhat a brand page shows: catalogue size, what its labels list, how often it leaves amounts undisclosed in blends, and which seals it prints.Wed, 07 Oct 2026 00:00:00 GMT Supplement safety basics, from the labelhttps://plainvitamins.com/guides/supplement-safety-basicshttps://plainvitamins.com/guides/supplement-safety-basicsThe warnings labels carry, the nutrients most often above the adult upper limit, and where to check a product further.Wed, 07 Oct 2026 00:00:00 GMT What supplement ingredients do, and where to read about themhttps://plainvitamins.com/guides/what-supplement-ingredients-actually-dohttps://plainvitamins.com/guides/what-supplement-ingredients-actually-doThe ingredients labels list most, and the federal fact sheets that explain each one.Wed, 07 Oct 2026 00:00:00 GMT What supplement labels contain, in numbershttps://plainvitamins.com/guides/are-supplements-worth-takinghttps://plainvitamins.com/guides/are-supplements-worth-takingSingle ingredients or formulas, how much against the Daily Value, how many leave amounts undisclosed: the market by the numbers, without a verdict.Wed, 07 Oct 2026 00:00:00 GMT