On Open Food Facts’ main page, at the top left corner of the screen, there’s a scrolling menu. At the bottom of it, you’ll find the “advanced search” option, on which you can click. It is then up to you to determine which criteria are the most relevant to your project(s). Once chosen, you’ll be able to download the obtained results by scrolling down at the bottom of the page and clicking on “Download results”.
You can also consult:
Our API documentation: https://openfoodfacts.github.io/api-documentation/
Open Food Facts' Terms of Use: https://world.openfoodfacts.org/terms-of-use
On our data: https://world.openfoodfacts.org/data