The queue-jumper orders a coffee then makes a hoo-ha about wanting soya milk.

When you are ready to eat, add the baking powder and the remaining soya milk, then stir well.

Fruit smoothie made with soya milk or soya yoghurt.

Soya milk, tofu, linseeds, chick peas, lentils and mung beans are good sources.

You can get it from 200ml of soya milk with your porridge, another 200ml in a cappuccino and 150g tofu.