Yeast - dry yeast bought for home bread making may contain emulsifiers containing stearic acid which may be derived from animal tissue or lactic acid, derived from milk. (eg. 'Tandaco' contained 491 sorbitan monostearate and 481 sodium stearoyl lactylate) 48

Yoghurt - cultured milk product, many contain gelatine. Yoghurt is very simple to make in the home kitchen, requiring only whole milk and a little culture from the bought variety or a previous batch. Yoghurt is thought to be useful in replacing intestinal flora after antibiotics. A soy alternative is available in supermarkets, and soft tofu (also made from soy) makes an excellent savoury alternative. 1, 58