there was no widely known or prominent medical theory or concept associated with a person named Bryan Johnson that gained significant attention in the medical community.
It is important to note that medical theories and concepts are typically evaluated, discussed, and validated through scientific research, peer-reviewed publications, and the consensus of experts in the field. If Bryan Johnson has put forth a medical theory, its acceptance and evaluation would depend on its scientific validity, supporting evidence, and whether it aligns with existing medical knowledge.
It's possible that new developments or information have emerged . To learn more about any specific theory or concept associated with Bryan Johnson and its reception in the medical community, I would recommend conducting further research using up-to-date sources and consulting reputable medical professionals and organizations.