3-Hydroxybutyrate Extends Lifespan by 21% in Mice Through Cellular Senescence Delay

As global populations age rapidly, with one in six people projected to exceed 65 by 2050, developing effective anti-aging interventions has become increasingly urgent. While various strategies from dietary modifications to regenerative medicine show promise, the need for safer, more accessible compounds with proven efficacy remains critical.

Researchers examined 3-hydroxybutyrate (3HB), a naturally occurring ketone body metabolite with an established safety profile, as a potential anti-aging intervention. The comprehensive study employed multiple model systems including human cell lines (2BS and WI-38), yeast models, and naturally aging mice to evaluate 3HB's effects across different biological systems.

The results demonstrated remarkable anti-aging effects across all tested models. 3HB supplementation extended yeast lifespan by an impressive 51.3% and increased median lifespan in naturally senescent mice by 21.0%. Importantly, the compound not only extended lifespan but also promoted healthy aging, mitigating age-related tissue morphology changes and organ senescence in mice. Using advanced RNA sequencing and metabolomics analysis, researchers identified that 3HB's anti-aging properties operate through delaying cellular senescence and promoting metabolic reprogramming.

The mechanistic insights revealed that 3HB enhances production of beneficial metabolites including trigoneline and isoguvacine, compounds associated with neuroprotection and metabolic health. This metabolic reprogramming appears central to 3HB's ability to delay the aging process at the cellular level, offering a novel pathway for therapeutic intervention.

These findings are particularly significant because 3HB represents an endogenous metabolite that the body naturally produces, suggesting excellent safety and tolerability compared to synthetic compounds. The research provides compelling evidence for 3HB's therapeutic potential while offering new mechanistic understanding of how ketone body metabolism influences aging processes, potentially opening new avenues for developing accessible anti-aging interventions.