Dr Lisa Wiedeman

Lisa Wiedeman is an optometric physician in practice since 1991 who has eaten an all-meat diet since 2009 — among the longest publicly documented tenures on the protocol. She practises clinically, coaches others through the dietary transition, and runs the Carb Sober Community as a structured coaching environment for people early in the change.

She is less famous than the better-known MDs on this list, but the value she adds is lived experience under more than a decade of public scrutiny: clinical practice, lab work, body composition and metabolic markers tracked over time. A useful counter to the assumption that carnivore is necessarily short-term, and one of the few figures here who also discusses eye health and how dietary patterns appear in ocular disease.