# Proof Check Desk
> The phrase sounds decisive but is often loose. Learn what to ask: which study, which product, which dose, which people, and who paid for it.

## Guides
- [Ingredient Studies vs Product Studies](https://research-backed-claims-explained.rudyjufo.workers.dev/study-of-ingredient-vs-study-of-product/): A study of ingredient vs study of product are two different things: the first looks at a substance on its own, the second at the exact finished item you would.
- [Sample Size and Who Paid for the Study](https://research-backed-claims-explained.rudyjufo.workers.dev/sample-size-and-who-paid/): Sample size and who paid are two of the quickest checks on any study a sales page cites.
- [Lab Results Versus Results in People](https://research-backed-claims-explained.rudyjufo.workers.dev/animal-and-lab-studies-versus-people/): Animal and lab studies versus people is the gap between early, controlled experiments and what happens in real mouths over real time.
- [Finding the Study a Sales Page Cites](https://research-backed-claims-explained.rudyjufo.workers.dev/how-to-find-a-study-cited/): To judge any research backed supplement claim, you first need the actual study, and a sales page gives you only a pointer to it.
- [Conflict of Interest in Supplement Research](https://research-backed-claims-explained.rudyjufo.workers.dev/conflict-of-interest-research/): A conflict of interest in research means someone involved has a stake in the result, such as funding or employment by a maker.

## About
- [About Proof Check Desk](https://research-backed-claims-explained.rudyjufo.workers.dev/about/): not medical advice, how the site is funded and how guides are made

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