# Unveiling the Anti-Aging Potential of 3HB: Lifespan Extension and Cellular Senescence Delay

## TL;DR

This study shows that 3HB, a natural metabolite, can delay aging and extend lifespan in mice and yeast by slowing cellular senescence and improving metabolism.

## Contribution

The study reveals that 3HB extends lifespan and delays aging by delaying cellular senescence and promoting beneficial metabolic changes.

## Key findings

- 3HB extended yeast lifespan by 51.3% and mouse median lifespan by 21.0%.
- 3HB mitigated age-related tissue changes and organ senescence in mice.
- 3HB's anti-aging effects are linked to metabolic reprogramming and production of metabolites like trigoneline and isoguvacine.

## Abstract

Background/Objective: Aging is a significant risk factor for chronic diseases and disability, yet effective anti-aging interventions remain elusive. We explored the potential of 3-hydroxybutyrate (3HB), an endogenous metabolite with established safety, to modulate longevity in mice. Methods: In this study, we employed 2BS and WI-38 cell models, a yeast model, and naturally aging mouse models to investigate the effects of 3HB on aging in various systems. Additionally, we utilized RNA sequencing and metabolomics technologies to explore the potential mechanisms underlying the action of 3HB. Results: Our findings demonstrate that 3HB supplementation effectively delays cellular senescence, extending yeast lifespan by 51.3% and the median lifespan of naturally senescent mice by 21.0%. Notably, 3HB prolonged healthy lifespan in mice while mitigating age-related tissue morphology changes and organ senescence. Mechanistically, we identified that 3HB’s anti-aging properties are mediated through its ability to delay cellular senescence and metabolic reprogramming, while promoting the production of beneficial metabolites like trigoneline and isoguvacine. Conclusions: These findings highlight the promising therapeutic potential of 3HB as an anti-aging intervention and provide novel insights into its underlying mechanisms.