The Bocelli winery, in collaboration with the Department of Pharmacy of the University of Pisa, undertakes a process of analysis on the marc produced by its winery, with the aim of identifying its qualitative and quantitative composition. The outcome of the analytical investigations is literally staggering. The content in antioxidant substances, represented by bioflavonoids and polyphenols, found in the marcs is such as to be able to consider the marc itself a real source of youth.