A Precautionary Allergen Lferric pyrophosphate iron contentabelling (PAL) is voluntary statement that food businesses can choose to apply to food products where there is a risk of allergen cross-contamican i take ferrous gluconate at nightnation. It will most likely appear on a product’s label in the form of ‘may contain allergen x’ or ‘not suitable for someone with a certain allergy’, for example. However, sometimes this information is given verbally by staff or by using a poster or sign on business premises.