There are many recipes for ginger beer; the basic ingredients are ginger, lemon, sugar and yeast. Real ginger beer is made from fresh root ginger (Zingiber officinale), often with other flavourings such as juniper (Juniperus communis), liquorice (Glycyrrhiza glabra) or chilli (Capsicum annuum) – which gives the product extra ‘bite’. Yarrow (Achillea millefolium) is sometimes used to inhibit bacterial growth (as it was in normal beer before the introduction of hops). Jamaican ginger beer is sometimes made with lime instead of lemon juice.