Template:Nutritional value/doc

This is the “nutritional value” infobox template, edited version of wikipedia:Template:nutritional value

Explanation
The following optional variables are converted into percentages of RDA (taken as averages for males and females aged 25-50 years from the USDA 2000 recommendation): Other optional variables and flags: Further remarks: Nutritional values can be found e.g. in the USDA National Nutrient Database. Note that fibers are counted as carbohydrates.
 * Required variables: name, kJ, carbs, fat, protein. Supply units (except for kJ which is in kJ).
 * Optional variables: sugars, lactose, satfat, transfat, monofat, polyfat, omega3fat, omega6fat, fiber, fibre, starch, water, alcohol, caffeine. Supply units (normally g).
 * Optional freeformat variables (name and value): opt1n, opt1v, etc. up to opt4n and opt4v.
 * Optional minerals (in mg): calcium_mg, iron_mg, phosphorus_mg, magnesium_mg, manganese_mg, sodium_mg, potassium_mg, zinc_mg
 * Optional vitamins (in mg, &mu;g, or international units): vitA_ug, betacarotene_ug (subcategory of vitamin A!), thiamin_mg (Vit. B1), riboflavin_mg (Vit. B2), niacin_mg (Vit. B3), pantothenic_mg (pantothenic acid), vitB6_mg, folate_ug, vitB12_ug, vitC_mg, vitD_ug, vitD_iu (in IU), vitE_mg, vitK_ug.
 * Optional footnote: note. (Convenient to indicate serving sizes or edible parts, e.g. 1 banana is 100 to 150 g)
 * Optional data source: source, or as a flag: source_usda=1 for the USDA database
 * Optional suppression of RDA explanation: noRDA=1
 * Optional flags: right=1 (table will be floating on the right)
 * According to convention, there should be a space between the number and the unit: "14 g" and not "14g".
 * Don't specify numbers in too many decimals. Food is often very variable; the USDA tables provide a standard deviation as an indication for how accurate the number is. If it says 1.2345 g with a standard deviation of 0.08 g, then 1.2 g is the highest accuracy worth mentioning.
 * Splitting up components that are present in trace amounts is not very meaningful (e.g. 1.5 g fats of which 0.5 g unsaturated).
 * The author of the template recommendeds to include only vitamins and minerals for which this product is considered to be a major source, in order to prevent clogging up the article with a huge table. As a guideline:
 * staple foods: an amount that provides 10,000 kJ should provide well over 100% of the RDI.
 * meats and such: same, but for 4,000 kJ.
 * vegetables, other low-calorie solid food, fruits: same, but for 400 g.
 * other products: use an amount that one could reasonably eat on a daily basis.

Template editing
In the HTML version: don't put line breaks into the template around the parser functions, because they will end up as line breaks above the table.