About VitaminReviews

Free, science-first supplement reviews built on data from the institutions you already trust. No hype, no sponsored rankings — just research, clearly presented.

Our Mission

The supplement industry generates billions in annual revenue, yet consumers are often left navigating a landscape of exaggerated marketing claims, influencer endorsements, and cherry-picked studies. VitaminReviews exists to cut through that noise.

Our goal is straightforward: provide comprehensive, evidence-based reviews of vitamins, minerals, and dietary supplements — entirely free and accessible to anyone. Every compound page on this site is built from peer-reviewed research and authoritative government databases, not marketing copy.

Whether you're evaluating a new supplement, checking a dosage, or simply curious about the science behind a nutrient, VitaminReviews gives you the data you need to make informed decisions about your health.

How We Build Our Reviews

Every review on VitaminReviews follows a consistent, data-driven process. We don't rely on anecdote, trends, or brand reputation. Instead, each compound's page is assembled from three primary data sources:

National Institutes of Health (NIH)

The NIH Office of Dietary Supplements provides comprehensive fact sheets on vitamins, minerals, and supplements. We reference their Recommended Dietary Allowances (RDAs), Tolerable Upper Intake Levels, and health-effect summaries.

PubMed / NCBI

PubMed indexes over 36 million biomedical research citations. We cite specific randomized controlled trials, systematic reviews, and meta-analyses to substantiate each compound’s evidence ratings.

USDA FoodData Central

The USDA’s food composition database provides nutrient profiles for thousands of foods. We use this data to show which whole foods are the richest natural sources of each vitamin and mineral.

For each compound, we compile this data into a structured review covering recommended daily allowances, upper intake limits, evidence-rated health benefits, potential interactions, and the best whole-food sources. Every claim includes a citation you can follow to the original study or database entry — check any compound's sources page to see this in practice.

What Guides Us

Evidence Over Opinion

Every health claim on this site links back to a published study or authoritative database. If the evidence is weak or conflicting, we say so directly rather than overstating benefits.

Transparent Sourcing

Each compound review includes a dedicated sources page listing every study, database entry, and fact sheet we referenced. You can verify our claims yourself — we link directly to the original research.

No Conflicts of Interest

We do not sell supplements. We do not accept payment from supplement brands for reviews. Our only interest is presenting the research clearly and accurately so you can make informed decisions.

Clear Evidence Ratings

We rate the strength of evidence for each supplement’s purported benefits using a four-tier system — strong, moderate, emerging, and insufficient — so you know how much confidence the research supports.

Food-First Approach

Supplements exist to fill gaps, not replace a balanced diet. That’s why every compound review includes a breakdown of the best whole-food sources so you can get nutrients from real meals whenever possible.

Free and Accessible

All reviews, data, and source citations on VitaminReviews are freely available. We believe science-backed health information should be accessible to everyone, not locked behind paywalls or subscription tiers.

Understanding Our Evidence Ratings

Not all supplement claims carry the same weight of evidence. We use a four-tier rating system to communicate how confident you can be in each purported benefit:

Strong Evidence

Supported by multiple high-quality randomized controlled trials, systematic reviews, or meta-analyses with consistent results. This is the highest confidence tier.

Moderate Evidence

Backed by several clinical studies with generally positive results, though some inconsistency or methodological limitations exist. Promising, but not yet definitive.

Emerging Evidence

Based on preliminary research — early-stage trials, observational studies, or animal models. Interesting but requires more rigorous investigation before drawing firm conclusions.

Insufficient Evidence

Very limited or conflicting data. The claimed benefit may be plausible but lacks the research needed to make a confident recommendation either way.

What We Cover

VitaminReviews provides in-depth reviews across several categories of dietary compounds:

Each compound review includes dosage guidance, an evidence-rated list of health benefits, potential side effects and interactions, and a curated list of the best whole-food sources with exact nutrient amounts per serving.

Built on Open Data

VitaminReviews is a data-driven platform. Rather than writing reviews from scratch, we aggregate structured data from NIH, USDA, and PubMed into a standardized format that powers every page on this site. This approach means our content stays consistent, verifiable, and easy to update as new research is published.

Interested in how we build and maintain data pipelines for content at scale? Our engineering team shares patterns and tooling insights at CodeSociety.net, where we explore developer tools, automation patterns, and the infrastructure behind modern web applications.

Important Disclaimer

VitaminReviews is an educational resource, not a medical service. The information on this site is intended for general informational purposes only and should not be considered medical advice.

Always consult a qualified healthcare provider before starting, stopping, or changing any supplement regimen — especially if you are pregnant, nursing, taking medication, or managing a health condition.

While we strive for accuracy and cite our sources transparently, science evolves. Recommendations and evidence ratings may change as new research becomes available.

Get in Touch

Have a question, found an error, or want to suggest a compound for review? We welcome feedback from our readers.