Nutrition
Per Serving Allergen Math
Per serving allergen math scales label risk to how much you actually eat—because multiple servings multiply exposure from the same package or shared tray.
Per serving allergen math checks whether you will eat one labeled serving or three—ingredient order and allergen presence scale with how much you actually consume. Share bags and catering trays need division before assuming trace amounts stay trace.
Combine with macro label reading so doubling portions doubles exposure, not just calories.
Common questions
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Does a trace amount stay safe if you eat the whole bag?
Exposure adds up with portion size—large servings of may-contain foods can exceed the cautious threshold your allergist set for tiny tastes.
Related terms
Put Per Serving Allergen Math into practice
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