Dear Emmanuel,
Yr comments are a little cryptic (to the "not everyone" anyway).
I guess you already saw the other current forum thread on general sources of nutrition data.?
I can only think of 3 main sources -
Measurement which requires you to specify what you want. Not so cheap IMEX but maybe depends where you are.
Customer who has met same or related product already and may be able to advise, at least may be able to tell you the parameters. Same comment regarding looking at existing labels on products on sale.
Database. I have never used such since I could never find the same species as required and the observable range of values usually deterred me from taking an "average". Nonetheless, I know this is done and regarded as an "approved' technique but presumably depending on the database (see para at end).
I hv met all 3 methods.
Regarding "low"/"high" whatever type claims, I hv seen info on this on the English FSA website (>search) but will presumably not be of general validity.
If you would like to see the potential queries regarding use of databases, I noticed a newsgirl post today concerning nutrition sources and followed it back a bit. Only relates to fruit, vegetables and fish but the eventual article is a kind of FDA viewpoint on databases et al -
http://www.cfsan.fda...d/fr060725.htmlInteresting but very heavy reading. I noticed the choice of value was linked to a 95pct (approx) confidence interval. Perhaps this is typical, I guess other database users here must have passed through a similar step?.
Happy Xmas and Safe Eating / Drinking
Rgds / Charles.C