Body & HealthFact

The numbers 4, 4, 9 and 7 are on every food label, hidden.

Calorie figures are no longer measured but calculated, using the 19th-century Atwater system: 4 kilocalories per gram of carbohydrate, 4 per gram of protein, 9 per gram of fat and 7 per gram of alcohol. Fibre yields about 2. These factors are averages; for nuts, for example, the energy actually absorbed is below the calculation.

Useful: Fat is so energy-dense that 1 tablespoon of oil delivers as much as 150 grams of boiled potatoes.

Source: en.wikipedia.org

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