The ingredients include home-grown herbs such as absinthe, rhubarb and gentian, grapefruit peel, vanilla pods, rosemary and red thyme, which country-dwellers have always used to aromatize their wines. Thirteen botanicals in all, entirely natural (with no ready-made dyes), processed individually and on a cottage-industry basis, whose complete list remains a secret according to the best Piedmontese tradition: each vermouth, in fact, has its own formula, jealously guarded within the family.