Add lactose support in ingredient analysis

[teolemon]

Why

• Many people are lactose intolerant
• We have the technical ability to do so (and probably the taxonomy ability as well)

What

• Wiki page (in French): https://wiki.openfoodfacts.org/FR:D%C3%A9tecteur_de_Lactose

Add lactose support in ingredient analysis

Beta Give feedback

1. Tracker bug for lactose support in ingredient analysis
2. Add tests
3. Tweak the ingredients taxonomy
4. Ensure the label lactose free is translated as widely as possible

Part of

• Add more ingredient analysis (tracker) #5706
• Add better support for specific diets #9092

[stephanegigandet]

This would need to be defined more precisely. We do have a detection of dairy products for allergens already. What would we do differently for lactose? There are some dairy foods that contain little lactose (e.g. butter), but they do contain some of it. We could try to estimate the lactose content, and then have thresholds for "low lactose content", but there's some research to do. There are also some "lactose free" milks which contain low lactose (because they have added lactase).

[alexgarel]

I also heard that Old hard paste cheese (fromage à pâte dure vieillis) have less lactose.

[toas-koas]

Is there any Update? We need a app that can tell me, when lactose is in the food. You can use the labels low lactose or lactose. We have the labels vegan, vegeteria, gluten... why no lactose?
Here is a Wikipedia article about lactose
https://en.wikipedia.org/wiki/Lactose

[alexgarel]

@toas-koas would you like to add it as a label on dairy products ?

You can already add whatever label you want. We can add to taxonomy later on. That said, maybe we can continue to discuss the plan first, to see what is more adapted.

[teolemon]

@stephanegigandet @alexgarel there would be some advantage in blending:

• ingredient analysis (the current allergen thing we do)
• lactose-free labels
• category analysis

to determine a lactose status for the maximum amount of products.

[github-actions]

This issue has been open 90 days with no activity. Can you give it a little love by linking it to a parent issue, adding relevant labels and projets, creating a mockup if applicable, adding code pointers from https://github.com/openfoodfacts/openfoodfacts-server/blob/main/.github/labeler.yml, giving it a priority, editing the original issue to have a more comprehensive description… Thank you very much for your contribution to 🍊 Open Food Facts