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Table 3 Calculating food protein exchanges from protein analysis on the food label

From: Development of national consensus statements on food labelling interpretation and protein allocation in a low phenylalanine diet for PKU

Protein content per item when calculated from label

Calculated exchange

0 g protein per food portion

Exchange free

0.1 g protein per food portion

Exchange free (if total volume consumed is ≤0.5 g protein)

0.2 g protein per food portion

Exchange free (if total volume consumed is ≤0.5 g protein)

0.3 g protein per food portion

Exchange free (if total volume consumed ≤0.5 g protein).

Suggest 1 portion is exchange-free, 2 portions is ½ exchangea

0.4 to 0.7 g protein per food portion

½ exchange protein

0.8 to 1.2 g protein per food portion

1 exchange protein

1.3 to 1.7 g per food portion

1.5 exchange protein

1.8 to 2.2 g per food portion

2 exchange protein

2.3 to 2.7 g per food portion

2.5 exchange protein

2.8 to 3.2 per food portion

3 exchange protein

  1. aThis may apply to ice cream lollies, gluten-free cakes, very small packets crisps, sweets