Yes: so far we have a revision history for each product, and a revert system, we use the photos to ensure accuracy of data and we rely on the Barcode to limit duplication.
If you're interested in helping on quality, please send me your email to pierre at openfoodfacts dot org so that I can invite you to our Slack.
The problem with other food databases I've seen is the amount of duplicate or incorrect information. Are y'all actively taking steps to curtail this?