This is the preventive and life-extension face of the Hygeian system and the reason the case belongs in this archive. Morison’s literature presents the pills not only as a cure but as the means of keeping the blood pure so that disease never takes hold. The securely documented wording in the Hygeian materials is the preservation of health (the institution was named the British College of Health, and Morison styled himself the Hygeist after Hygeia, the personification of health); the promise of lasting health and long life follows from that preventive doctrine rather than from a single verbatim Morison slogan, and it is stated here as the system’s claim, not as his exact phrasing. The claim is mechanism-only and refuted: there is no evidence that purgation preserves health or extends life, and the humoral premise on which the promise rests is obsolete. It is the structural counterpart, in a cheap mass-market pill, of the longevity promise this archive traces through regimens and tonics sold on the same unproven logic.