Jacek Hoffman Proposes Tailoring Combinations of Anti-Aging Interventions to the Body’s Current State

Jacek Hoffman Proposes Tailoring Combinations of Anti-Aging Interventions to the Body’s Current State

On August 19, Jacek Hoffman published an essay presenting his hypothesis: maintaining health over a long life requires assessing several processes at once and tailoring their combination to the body’s current state.

Hoffman’s starting point was a study of the Greenland shark heart. The authors examined tissues from ten sharks approximately 100–155 years old and found fibrosis, which is the growth of connective tissue, lipofuscin, a substance that is difficult to break down and accumulates in cells, and signs of oxidative stress. Before being caught, the animals located, pursued, and seized the bait. The authors consider this behavior indirect evidence that physiological function remained intact.

Hoffman uses the difference between tissue damage and the sharks’ active behavior to consider whether a similar distinction may matter in humans. His hypothesis is that the body must be supported through several processes at once, and that strengthening one process changes the conditions under which the others operate. Active removal of damaged cells helps suppress tumors, but it also increases the tissue’s need for repair. Stem cells replace lost cells. The more often they divide, the more often the tissue is renewed and the more opportunities arise for changes in individual cells. The immune system recognizes infections and abnormal cells, while prolonged immune activation damages tissues.

An intervention in one system changes how the others function. Hoffman therefore proposes choosing interventions according to age, the specific tissue, the damage already accumulated, and the available reserve of resources. He describes the process as follows:

“Observation → reconstruction of the current state → causal model → intervention selection → action → repeated measurement → model update.”

Hoffman proposes testing this hypothesis by comparing models. Models that account for the relationships among immunity, metabolism, tissue renewal, and organ function should predict subsequent health deterioration better than models that consider the same measures separately. In his framework, the combination, timing, and intensity of interventions are assessed according to whether they preserve the body’s function and how much strain they place on other systems.