Hufeland used the case of the Venetian nobleman Luigi Cornaro, who in the 16th century attributed his long life to a fixed and spare daily ration, as a worked example of macrobiotic living. In the Erasmus Wilson English edition the Cornaro ration is cited as roughly twelve ounces of food and thirteen ounces of drink per day. The claim is a testimonial: it generalizes from a single self-reported life history to the efficacy of abstemious living for prolonging life. It is classified as untested because an individual anecdote, however often repeated, is not a controlled demonstration; there is no comparison group, no measured endpoint beyond the single reported lifespan, and no control for the many other determinants of how long Cornaro lived. The anecdote is recorded here because it was a load-bearing part of Hufeland’s evidence and because the underlying idea, that a spare fixed diet extends life, recurs as a documented case in its own right in the dietary-restriction tradition.