The use of spices, common nowadays, was once a sign of high position, luxury and wealth. The value of food ingredients is thus determined by the time in which one lives, that is, it is a product of fashion, since they are always used in a social context. Many plants used as spices enjoyed fame and undeniable importance in the past but their reign was more or less ephemeral, as they were rejected in favour of others for food seasoning, or simply upstaged and/or used for other purposes.Fashion also dictates how each society sees food and feeding, since Western perceptions are not necessarily similar to Oriental ones, which in many cases add spiritual components to the physical ones. In addition, in the past, the kitchen of the court was diff erent from that of the common people, much as today when the festive kitchen is diff erent, qualitatively and quantitatively, from the kitchen of daily life.Taste evolved, being shaped by the assimilation of new choices and adjusted to suit particular needs, sometimes converting medicines into foods and/or beverages that may now be sought for general consumption outside a medicinal context. As taste evolved with time, some plants gave way to others, but spices in all continue to enjoy prestige and stature with consumers.Spices interact directly with food, modifying fl avour, fragrance and visual appreciation, for example, the fragrance and green colour of mint leaves, either in a meat dish or in ice cream; the yellow of saff ron, in rice and in so many sauces; oregano leaves over a tomato salad; the brown of cinnamon over a sweet-rice dish are proof of this. Spices can thus coexist in decorative (appearance), medicinal (drugs), aromatic (perfumes) and condiment (seasonings) aspects, which contributes to their value for man.In a world of ever-growing globalism, aromatic plants and spices have to address the question: what does the customer want? Consumer tastes are traditional but also appreciate the benefi ts of new fl avours and aromas.Nevertheless, the growing of aromatic plants and spices faces several problems which mean that the industry, the growers and workers must investigate other, less laborious, methods for synthetic or biotechnological alternatives or for the optimization of cultivation conditions.The geographical expansion of production gives a greater likelihood that natural catastrophes will not disrupt market trade, but it is also important to know that local cultivars are much more locally adapted and may have advantages, such as drought resistance, tolerance to saline soils or overfl ow, and thus can use environments unsuitable for other crops or otherwise prone to desertifi cation.Shortening the supply chain may also have a positive eff ect on the local economy and on market trade. Whereas in general, in the past, importing countries undertook plant extraction, today more and more the extraction is performed in the country of production.Although man has used plants for so long, little is really known about the molecular mechanisms behind the production of pla...