Read the label, not the marketing
Most supplement formulas and label literacy content online is a press release with a byline, or the same few sources rewritten. Smart Formula Guide works more narrowly: one question at a time, read against the research, with the uncertainty left in.
About us · How we review · Medical disclaimer
Browse by subject
Label Literacy
How to read a Supplement Facts panel and what each line legally means.
Dosing & Bioavailability
Studied dose versus supplied dose, and what actually gets absorbed.
Formula Breakdowns
Ingredient-by-ingredient analysis of how a formula is built.
Claims & Evidence
What a claim on a bottle is allowed to say, and what it is not.
Ingredient Guides
Reference entries on individual ingredients.
Recently published
- Magnesium Forms: A Label-Reading Guide for Consumers
- Structure-Function Claims: What a Supplement Label Can Really Say
- How to Read a Multi-Ingredient Supplement Formula
- Supplement Forms Explained: Why the Form on the Label Matters
- Percent Daily Value: What %DV Actually Tells You (and What It Hides)
How we decide what to publish
- We start from primary research — trials, systematic reviews and meta-analyses — not from other people’s articles.
- We read the methods. Sample size, duration and funding all change how much a finding is worth.
- For any ingredient we check the dose actually studied against the dose typically supplied.
- Where evidence is thin, animal-only or industry-funded, we say so.
This site is information, not medical advice. Nothing here can account for your history, medication or symptoms. Talk to a qualified clinician before changing anything. Read the full disclaimer.