We are excited to announce not one, but two  new biological age estimation tools coming to the Rejuve Longevity App: RejuveAge-Q  and LinAge2 . These two open models expand our scientific foundation and give Rejuve community members and researchers new ways to estimate biological age, understand health trajectories, and contribute to collaborative longevity research. RejuveAge-Q: Accessible, Science-Based Biological Age via Questionnaires RejuveAge-Q is our newly developed qu