Andreas Tsiartas

Founder of the Self-Mastery Compendium, the Self Matrix, CORE Compass, and the Excellence Nexus

I don’t teach theory. I teach what I’ve lived.

I’m a clinical nutritionist, strategist, and systems builder with a background that spans law, business, neuroscience, and personal transformation.

I’ve built and led companies, advised clients on high-level strategy, authored company compliance frameworks, and developed real estate from the ground up. I’ve trained under elite martial artists, represented my country internationally, and worked in corporate compliance and health consultancy. I’ve faced serious illness, burnout, and collapse, and rebuilt from the ground up. Everything I now share, my frameworks, Compendium, and book, comes from that place.

What I Do

I help individuals master themselves across six core dimensions: physical, mental, emotional, spiritual, financial, and impactful living. This website isn’t about self-help; it’s about structured self-mastery. Through three original frameworks, the Self Matrix, the CORE Compass, and the Excellence Nexus, I offer practical systems for people who want to think clearly, live deliberately, and build something real. These are not motivational slogans. They’re distilled insights built from evidence, experience, and fire-tested transformation.

On Grit, Circumstance, and Showing Up

At 17, I stepped into BUD/S, SEAL training, already carrying a severe injury. I could barely grip with my right hand and functioned only with corticosteroids and NSAIDs. I didn’t go in seeking glory, but I came out with something more profound: the lived truth that grit matters, but so do circumstances. The illusion that effort alone guarantees success is one we must outgrow. That experience taught me what it means to suffer and to show up broken, even when success is out of reach. Because showing up still means something.

But the damage went deeper than I realised, and the suffering I endured, along with the choices I made, would return to claim their dues. At 22, a second ordeal began. One that would take a decade to overcome. My body started to unravel. I dropped from a lean 80 kilos, a weight I’d maintained most of my life, to 59. I became a shadow of myself. My digestion collapsed. I lived with burning reflux so severe that eating felt like swallowing glass. Antacids, prescribed repeatedly by multiple doctors in line with standard medical guidelines, only made things worse. My hormones crashed. I was later diagnosed with chronic fatigue and thyroid dysfunction and placed on hormonal support.

I went from expert to expert across Cyprus and the UK, including both mainstream and holistic practitioners. Some helped. Many didn’t. A world-class acupuncturist and a few functional doctors helped me move forward, and I’m grateful for that. But no one could fix me. I had to do that myself.

In the end, it wasn’t one method or philosophy that saved me. It was the integration of everything: biology, nutrition, systems thinking, and lived experience. I didn’t just recover. I rebuilt. What emerged was more than health. It was a new operating system for life. That’s how the Self Matrix, the CORE Compass, and the Excellence Nexus were born. These aren’t abstractions. They’re frameworks I forged to survive, then thrive, and now, to serve.

Cultivating Life

I came to see that transformation doesn’t happen in parts. You can’t master your body while your mind remains scattered. You can’t heal your health while your relationships fracture. You can’t pursue purpose while living in scarcity. Each domain shapes the next, subtly, powerfully, and inevitably.

To thrive, life must be cultivated as a whole, body, mind, heart, soul, wealth, and impact. Each part strengthens the others. Each one is essential.

This isn’t a collection of ideas. It’s a living system.

Life is a system. And the whole is always greater than the sum of its parts.

Brief Background

• MSc in Clinical Nutrition – University of Aberdeen (Distinction)
• Bachelor of Arts in Law and Business Studies – awarded by Warwick Law School and Warwick Business School (Honours, Qualifying Degree)
• Certified Sports Nutritionist (CISSN)
• Registered Clinical Nutritionist – Cyprus Dietetic & Nutrition Association
• ANutr Member – UK Association for Nutrition
• Founder of ventures across health, strategy, and real estate
• Experience spanning strategic consulting, compliance, and operational leadership across sectors: from finance and regulation to wellness and education
• Lifelong martial artist – trained with Bill “Superfoot” Wallace and was guided and taught for many years by Constantinos Archontides during the early emergence of Brazilian Jiu-Jitsu in Cyprus
• Selected four times to represent Cyprus at the European Youth Parliament before the age of 20, developing early leadership, diplomacy, and public speaking under pressure

Why I Built This Platform

The Self-Mastery Compendium includes over 40 research-grade articles across neuroscience, performance, recovery, mindset, and meaning. You’ll also find the CORE Compass for balanced living and the Excellence Nexus, a blueprint for high-level mastery across six core dimensions of life. I built this for you if you’re tired of surface-level content and ready to step into disciplined self-mastery.

Who This Is For

This work is for those who:

• Want clarity, structure, and truth
• Are committed to becoming sharper, stronger, and more aligned
• Understand that excellence is built, not inherited
• Are willing to face themselves honestly and act

If you’re tired of gimmicks and noise, this is your moment. Join now and begin becoming who you were meant to become.