Official sources first. Health and safety facts come from public bodies such as the NIAAA, CDC, NHS and FDA; laws from government websites; nutrition from USDA FoodData Central.
Brands from the producer. Alcohol content and calories of a brand come from the producer’s own page or label. If the producer does not publish a figure, we say so instead of guessing.
Dated. We note the date we read each source and re-check pages when sources change.
Calculations shown. Our calculators print the formula and the source of every constant.
When sources differ, we show both and explain why.
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