Blood plasma composition plays a critical role in the aging process and the progression of age-related diseases.

From Parabiosis to "Young Blood" The foundation of this field stems from "heterochronic parabiosis" experiments, where the circulatory systems of young and old animals are surgically connected. These studies demonstrated that exposure to a young systemic environment can rejuvenate aged tissues—such as muscle, liver, and brain—while old blood accelerates aging in young animals. This sparked a controversial commercial fad where startups offered "young blood" plasma infusions to older adults. However, the FDA issued strong warnings against this practice, stating that such treatments have no proven clinical benefits for anti-aging and carry significant safety risks, forcing many of these clinics to shut down.

The Paradigm Shift ...