I recently became convinced that my long COVID must be closely linked to the strange collection of pre-COVID disorders I have developed over the course of my life, and in turn, I discovered that every last such disorder has been persuasively linked, in peer-reviewed research findings, to thiamine deficiency. With my doctorś approval, I started myself on a thiamine repletion program (leaning, in part, on a protocol popular among Parkinsonś patients), and today I discovered the following validation for my hunch and for my latest course of action. https://www.bmj.com/content/370/bmj.m3489/rr-3 In this connection, I want to flag the towering body of work of Cleveland Clinic physician/researcher Dr. Derrick Lonsdale, who, more than any other single scientist, has laid out the profound and pervasive role of chronic subacute thiamine deficiency in development of a vast array of diseases (which happen to feature many of the most-observed symptoms we struggle with in long COVID). Too soon to tell, but I am excited about how much better I may eventually be doing after arriving at just the right level of B1 supplementation.