This is the explicit life-extension claim that places the case in the archive. Brodum’s own royal-patent broadside states that “The grave has lost many a victim, and the health of thousands been preserved to extreme old age, through the fortunate discovery of this invaluable medicine”, and that the Nervous Cordial, for which he held the royal letters patent, “will protect them from the infirmities of old age and a wretched dissolution”. The claim is mechanism-only and refuted: it was never subjected to a controlled trial, the medicine was a secret proprietary preparation sold on testimony, and the breadth of the surrounding cure-all promise marks it as an unfalsifiable patent-medicine claim rather than a demonstrated effect. Informed contemporaries classed Brodum among the empirics (Corry’s Detector of Quackery names him with Solomon and Perkins), and the patent-medicine historian Alan Mackintosh records him as the most notorious of the irregular owners and a byword for quackery (Mackintosh 2017). The archive records the preservation-of-health-into-old-age pitch itself as the life-extension claim, without attributing to Brodum a specific verifiable lifespan figure.