About Letters of Radiance.

We aim to use this blog as a way to communicate research and relevant information about the Rosita App and our journey as a startup.

Expect well reasoned and researched posts about the topic of longevity and senior health. We have a strong team of researchers and doctors, including biomechanics, nutrigenetics, molecular biology, cancerous cell research and the fitness science, and together we will build out the Longevity Pyramid with regular posts.

You can use Rosita in US and Spain, by downloading the App here: Rositalongevity.com.

Subscribe to Letters of Radiance - The Newsletter for longevity geeks

Extending your healthspan is possible and the most altruistic thing you can do for those who love you. With Letters of Radiance we want to bring our readers access to what science is saying about longevity with our own point of view


Juan Cartagena

Cofounder at Hearts Radiant. Helping our favorite people live longer and better.