Brodum’s marketing rested on the late-Georgian anxiety over the supposed bodily ruin of youthful excess. His book, titled A Guide to Old Age, or a Cure for the Indiscretions of Youth (London, printed by J. W. Myers for the author, 1795), framed the same insinuation as his advertising: that the debility produced by the “dissipation of youth” could be reversed by his medicines. The broadside addresses “All kinds of DEBILITY, whether arising from the HABITS of SCHOOL BOYS, or the INDULGENCE of MATURE AGE”, and tells the reader that “The strongest and most vigorous constitutions have frequently been destroyed beyond redemption by those imprudent practices; yet let not the invalid despair”, since the cordial has recovered “the most emaciated”. The claim is mechanism-only and refuted: there was no controlled evidence that the secret medicines reversed any such condition, the targeting of a shameful, privately-disclosed complaint is a classic structure for an unfalsifiable nostrum, and Brodum was treated as an empiric by the informed medical opinion of his day (Mackintosh 2017). The book is the vehicle that ties the youthful-indiscretion cure to the broader promise of preserving health into old age.