Missing nutrients (e.g. Polyols)

[monsieurtanuki]

Description

cf. @CharlesNepote's openfoodfacts/smooth-app#4943
There are some nutrients in Food.pm and https://world.openfoodfacts.org/cgi/nutrients.pl?lc=fr&cc=fr that we don't deal with in off-dart: they are not in off-dart's Nutrient enum.

Expected behavior

We should be able to deal with all nutrients, at least most of them.

[monsieurtanuki]

@CharlesNepote There are 47 "nutrients" found in Food.pm that are currently not in off-dart.
For each nutrient, we need to attach a Unit (KCAL, KJ, G, MILLI_G, MICRO_G, MILLI_L, L, PERCENT).
Would you list the important nutrients you would like to see added, each with their unit?

1. alpha-linolenic-acid
2. arachidic-acid
3. arachidonic-acid
4. behenic-acid
5. beta-carotene
6. bicarbonate
7. carbon-footprint
8. carbon-footprint-from-meat-or-fish
9. casein
10. cerotic-acid
11. chlorophyl
12. cocoa
13. collagen-meat-protein-ratio
14. dihomo-gamma-linolenic-acid
15. elaidic-acid
16. energy-from-fat
17. folates
18. fructose
19. fruits-vegetables-nuts
20. fruits-vegetables-nuts-dried
21. fruits-vegetables-nuts-estimate
22. gamma-linolenic-acid
23. glucose
24. glycemic-index
25. gondoic-acid
26. insoluble-fiber
27. lactose
28. lignoceric-acid
29. maltodextrins
30. maltose
31. mead-acid
32. melissic-acid
33. montanic-acid
34. nervonic-acid
35. nucleotides
36. nutrition-score-fr
37. nutrition-score-uk
38. omega-9-fat
39. ph
40. polyols
41. serum-proteins
42. silica
43. soluble-fiber
44. starch
45. sucrose
46. taurine
47. water-hardness

[CharlesNepote]

@monsieurtanuki, I have investigated a little bit and, yes, all your questions' answers are in the Perl code: https://github.com/openfoodfacts/openfoodfacts-server/blob/7d295d10fcc8939cccfd093810cb0edb8a3c9449/lib/ProductOpener/Food.pm#L400

We should ask ourselves if these data shouldn't be provided as data, and not as Perl code, to let any kind of apps reuse it more easily -- a YAML file as it allows comments? Should I open a bug @stephanegigandet ?

[monsieurtanuki]

@CharlesNepote Developers can already get a JSON version of it with https://world.openfoodfacts.org/cgi/nutrients.pl?lc=fr&cc=fr, easy to reuse, therefore I think we're already almost good here.
Except that the unit is missing: that would be helpful for instance to know that vitamin b12 is rather given in µg. Where does the default unit come from?

[stephanegigandet]

@monsieurtanuki @CharlesNepote all the nutrients and their default unit are in the nutrients taxonomy: https://github.com/openfoodfacts/openfoodfacts-server/blob/main/taxonomies/nutrients.txt

I can add the units to the output of https://world.openfoodfacts.org/cgi/nutrients.pl?lc=fr&cc=fr

[monsieurtanuki]

I can add the units to the output of https://world.openfoodfacts.org/cgi/nutrients.pl?lc=fr&cc=fr

@stephanegigandet That would be nice, that's typically the unit:en: µg info that we need in the current issue.

[CharlesNepote]

@monsieurtanuki : FYI, @stephanegigandet has added the units into https://world.openfoodfacts.org/cgi/nutrients.pl?lc=fr&cc=fr

[monsieurtanuki]

Thank you @CharlesNepote @stephanegigandet!
That means we can now add the unit into our OrderedNutrient object.

For the record, some stats about the lc=fr&cc=fr unit repartition:

• g: 65
• mg: 26
• µg: 11
• kj: 3
• kcal: 1
• % vol: 2 ("acidity", "alcohol") - same as % or needs to be added?
• %: 5
• mmol/l: 1 ("water-hardness") - needs to be added
• empty unit: 4 (e.g for "nutriscore")

[monsieurtanuki]

To be checked, added or edited in off-dart (data from lc=fr&cc=fr):

• unit: 'kj'
  • energy-kj
  • energy-from-fat
  • energy
• unit: 'kcal'
  • energy-kcal
• unit: 'g'
  • fat
  • saturated-fat
  • butyric-acid
  • caproic-acid
  • caprylic-acid
  • capric-acid
  • lauric-acid
  • myristic-acid
  • palmitic-acid
  • stearic-acid
  • arachidic-acid
  • behenic-acid
  • lignoceric-acid
  • cerotic-acid
  • montanic-acid
  • melissic-acid
  • unsaturated-fat
  • monounsaturated-fat
  • polyunsaturated-fat
  • alpha-linolenic-acid
  • eicosapentaenoic-acid
  • docosahexaenoic-acid
  • linoleic-acid
  • arachidonic-acid
  • gamma-linolenic-acid
  • dihomo-gamma-linolenic-acid
  • oleic-acid
  • elaidic-acid
  • gondoic-acid
  • mead-acid
  • erucic-acid
  • nervonic-acid
  • trans-fat
  • sugars
  • added-sugars
  • sucrose
  • glucose
  • fructose
  • lactose
  • maltose
  • maltodextrins
  • starch
  • polyols
  • erythritol
  • carbohydrates
  • fiber
  • soluble-fiber
  • insoluble-fiber
  • proteins
  • casein
  • serum-proteins
  • nucleotides
  • salt
  • added-salt
  • sodium
  • beta-carotene
  • taurine
  • chlorophyl
  • carbon-footprint
  • carbon-footprint-from-meat-or-fish
  • choline
  • phylloquinone
  • beta-glucan
  • inositol
  • carnitine
  • inositol
  • carnitine
• unit: 'mg'
  • omega-9-fat
  • omega-3-fat
  • omega-6-fat
  • cholesterol
  • vitamin-e
  • vitamin-c
  • vitamin-b1
  • vitamin-b2
  • vitamin-pp
  • vitamin-b6
  • pantothenic-acid
  • silica
  • bicarbonate
  • potassium
  • chloride
  • calcium
  • phosphorus
  • iron
  • magnesium
  • zinc
  • copper
  • manganese
  • fluoride
  • caffeine
  • sulphate
  • nitrate
• unit: 'µg'
  • vitamin-a
  • vitamin-d
  • vitamin-k
  • vitamin-b9
  • folates
  • vitamin-b12
  • biotin
  • selenium
  • chromium
  • molybdenum
  • iodine
• unit: '% vol'
  • alcohol
  • acidity
• unit: '%'
  • fruits-vegetables-nuts
  • fruits-vegetables-nuts-dried
  • fruits-vegetables-nuts-estimate
  • collagen-meat-protein-ratio
  • cocoa
• unit: 'mmol/l'
  • water-hardness
• unit: ''
  • ph
  • nutrition-score-fr
  • nutrition-score-uk
  • glycemic-index