Data
Data
O ble mae'r data'n dod, sut mae'r fformiwlâu'n cael eu cyfrifo, a ble mae'r cyfyngiadau.
In short
Use the numbers on this site as a guide. Neither the food database nor the calculator promises perfect precision.
- Food pages are based on Open Food Facts data and cleaned up before publication.
- The calculator gives a starting estimate, not a personal medical target.
- If numbers disagree, the package and your real weight trend matter more.
Sut mae'r safle'n gweithio
Egwyddorion cyhoeddi
O ble mae'r data'n dod
Mae'r gronfa ddata wedi'i seilio ar adran RU o Open Food Facts. Cyn cyhoeddi, mae'r data'n cael ei safoni fel bod tudalennau cynnyrch yn ddarllenadwy ac yn gymharol.
Nid ydym yn cyhoeddi'r data crai fel y mae: yn gyntaf rydym yn siapio'r meysydd yn glir, ac wedyn yn adeiladu tudalennau a chyfrifianellau ar eu top.
Rheolau cyhoeddi
Rydym ond yn cyhoeddi tudalennau lle mae'r data a'r strwythur yn glir i bobl, nid dim ond i beiriannau chwilio.
Nid ydym yn ystyried canlyniadau chwilio na gwladwriaethau dros dro cyfrifianellau fel tudalennau prif y safle.
Sources
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Open Food Facts Knowledge Base. Are there conditions to use the API?
Official Open Food Facts page about reusing the database.
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Mifflin MD, et al. A new predictive equation for resting energy expenditure in healthy individuals.
Original paper for the Mifflin-St Jeor formula.
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Frankenfield D, Roth-Yousey L, Compher C. Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: a systematic review.
Review comparing common calorie formulas.
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Hall KD, et al. Quantification of the effect of energy imbalance on bodyweight.
Explains why body weight does not change in a straight line.
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Jäger R, et al. International Society of Sports Nutrition Position Stand: protein and exercise.
Background for the protein ranges used by the calculator.
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Slavin JL. Position of the American Dietetic Association: health implications of dietary fiber.
Source for the 14 g per 1,000 kcal fiber rule.
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Urban LE, et al. Food Label Accuracy of Common Snack Foods.
Shows that label values can still differ from lab measurements.