Arun Jayaraj is the founder of Sentium, a longevity architecture practice based in Singapore. He trained as a physician at King's College London, built and led a clinical team at a longevity practice in Singapore, and advises an AI-driven health startup. He has personal training and performance coaching experience alongside his medical degree — a combination that is rarer than it should be, and more useful than most people expect.
His work is built on a single observation: the most important changes in a human body are the ones that produce no symptoms. A biomarker drifting quietly out of range. A risk factor that no standard panel tests for. A trajectory that is entirely correctable — if someone is watching.
Sentium exists to watch. This blog exists to share what that watching reveals.
The writing here is for people who want to understand their biology at the level it deserves — not reassured by simplicity, not intimidated by complexity. Founders, executives, and families who have learned to delegate what matters, and are beginning to ask why their health hasn't had that person yet.
Nothing here is generic. Nothing is written for a general audience. If it doesn't make you think differently about something specific, it isn't ready to publish.