The nutritional transition, together with the demographic and epidemiological transitions, stands as one of the most crucial phenomena shaping societies in the 20th century. A prominent characteristic of the nutritional transition is the increased consumption of animal-origin protein, particularly meat. Within this context, the present article utilises Spain as a case study to provide a close examination of the nutritional transition during the latter half of the 20th century. Spain’s significance lies in its late but rapid development of this transition. In the 1960s, meat consumption was relatively low compared to other European countries; however, within just two decades, it surpassed that of many developed nations. On one hand, the article offers a detailed insight into how budget constraints were eased to foster meat consumption among various consumer groups. On the other hand, the study aims to quantify the influence of income, prices, and preferences in driving this process