Accountability
About PlainVitamins
PlainVitamins reads the supplement labels in the NIH Dietary Supplement Label Database and sets every amount against every other product that lists the same ingredient. It is published by PlainVitamins and owned by Kiznis Studio.
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What PlainVitamins publishes
The NIH Office of Dietary Supplements keeps a database of the labels of dietary supplements sold in the United States. Its January 2026 release (version 9.4.0) holds 214,780 labels. PlainVitamins groups them into 116,682 products (one per product name and brand) from 5,741 brands, and gives each product, ingredient and brand a page.
On top of the labels we compute what no single label shows: where a product's amount of an ingredient sits among every product listing it, how it compares with the FDA Daily Value and the adult upper intake level, which products have the closest formula, and what a brand or a category typically contains. The methodology explains every step and the analyses publish what the whole database shows.
What it is not
- It is not medical advice. A label amount set against the Daily Value or the upper limit is a reading of the label, not a recommendation for anyone; a clinician decides what one person should take.
- It does not test products. The amounts are what the label states, as NIH transcribed it; the bottle in your hand is the authority on what it says today.
- It does not rate or rank products by quality, and it sells nothing. There are no affiliate links and no shop.
- It is not the NIH. PlainVitamins is independent and is not affiliated with the NIH, the FDA, or any brand or retailer named on it.
Who answers for it
The owner is Kiznis Studio, based in Lithuania. AI tools do most of the work on PlainVitamins: they write its code, its page templates and the wording of its guides and analyses. They do not supply numbers. Every amount, share and rank is a query over the NIH label files, and each analysis prints its method and its limits beside its findings. No physician, pharmacist or dietitian checks the pages; where that matters, the page says so and points to one.
Write to hello@plainvitamins.com and a person at the studio reads it. That person is accountable for what PlainVitamins prints and handles every reported error.
Who pays for it
Display advertising served by Journey by Mediavine. Advertisers do not choose or influence what is published, and no brand, manufacturer or retailer pays for placement. Reading the site is free and needs no account.
How current is it?
Every page reads the January 2026 release of the database (version 9.4.0, downloaded by NIH on January 10, 2026); its newest label entered on September 25, 2025. A product page shows the date its label was entered and links the NIH record. When NIH publishes a new release, it is loaded and checked against the previous one, and the changelog records it.
How do I correct a page?
Write to hello@plainvitamins.com with the page address and what looks wrong. We compare the page with the NIH label record; corrections explains what happens next. If the NIH record itself differs from the label, the manufacturer or anyone can report it to the database, and the page follows at the next release.