My Story: From Sunlight to Synchrony
I was born in Brazil — a land of sunlight, rhythm, and effortless vitality. There, health was not something you chased — it was something you lived in. Mornings began with the sun, meals were real food, and sleep followed nature’s cues. Then came the move to the UK, where I studied Nutrition Science. Suddenly, light wasn’t constant — and neither was my energy. I learned firsthand what happens when the rhythms of biology meet the pace of modern life. After more than a decade in The Hague now, my curiosity deepened. Patients arrived with the same story in different forms — fatigue, restless sleep, digestive chaos, burnout masked as ambition. It wasn’t just lifestyle. It was a loss of synchrony between the gut, the brain, and time itself.
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So I immersed myself in sleep medicine, microbiome research, and nutritional biochemistry, exploring how these systems communicate.
That journey led to several publications in journals such as Nutrients and Frontiers in Physiology, as well as research conducted at the University of Oxford, all exploring how sleep, the microbiome, and nutrient signalling shape our biological timing.
Together, they revealed a simple truth: “Health isn’t built through control — it’s remembered through rhythm.”
Today, through my Synchrony Method, I help high-performers and women struggling with sleep, gut, and energy issues reconnect to their biology — using science that feels human. Absurd as it sounds, sometimes the most advanced medicine starts with listening — to your microbes, your metabolism, and the time within you.
About me
I have always believed that nutrition is one of the most powerful tools we have to take charge of our health. My name is Adriano dos Santos, and people know me as The Circadian Nutritionist™. I help high-performing individuals reclaim their health and vitality by syncing their nutrition and lifestyle with their body’s natural circadian rhythms. In other words, I show you how, when you eat, sleep, and live can be just as important as what you do.
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As a Registered Nutritionist with a BSc in Nutrition Science and an MSc in Sleep Science, I specialize in translating complex biology into simple, actionable steps. With over two decades of experience in sports science and integrative nutrition, I’ve developed a personalized approach that combines cutting-edge research with real-world practicality. My focus is on restoring your body’s internal clocks and metabolic balance to address issues like chronic fatigue, stubborn sleep problems, digestive troubles, and immune imbalances.
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What makes my approach unique is the lens I bring from my diverse expertise. I have formal training in sleep medicine, and gut microbiome science. I work from the lens of precision medicine. This means I don’t follow a one-size-fits-all formula. Instead, I use advanced tools – from advanced blood tests, DNA insights to microbiome analyses – to tailor a health strategy that fits your biology and lifestyle. Every recommendation I give is rooted in science and tailored to you and not in fads.
Beyond working with individual clients, I publish scientific research in the field of sleep, gut microbiome and nutrition. I also collaborate with forward-thinking health companies and institutions. I’ve consulted for precision medicine labs to help develop research-driven lab testing. I’m also a lecturer and speaker on the international stage – sharing insights on sleep science, the gut–brain axis, and preventive medicine at conferences around the world. (If you’ve attended events like the Oxford Personalised Medicine conference, Nordic Conference, IHCAN or other integrative health summits, you may have seen me presenting the latest findings on circadian health and nutrition.)
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I’m deeply committed to staying at the forefront of health science. In 2025, I completed a research fellowship at the University of Oxford, where I led an animal study on how artificial light is modulating our microbiome and metabolism. I’ve recently graduated with a master's degree in Sleep Medicine at the University Hospital of Bern, exploring how our brain, gut microbes, and metabolism interact to affect sleep. I’m also an active member of professional bodies like the Institute for Functional Medicine (IFM), the Royal Society of Medicine (RSM), and the Dutch Association for Precision Medicine (MBOG). Staying involved in research and these communities helps me bring my patients and partners the very latest innovations in wellness.
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On a more personal note, I practice what I preach. Whether it’s getting morning sunlight to kick-start my own circadian clock or timing my meals to align with the day’s rhythm, I live out the principles of circadian health every day. I genuinely believe that health isn’t about choosing between conventional and alternative medicine – it’s about blending the best of both. That’s why I integrate modern medical science (think on real “evidence-based” nutrition) with holistic practices (like mindful lifestyle tweaks). The result is a broader, more powerful approach to healthcare that treats you as a whole person, not just a set of symptoms.
My vision of integrated medicine
My mission is simple: to help you reclaim your natural rhythm, energy, and resilience. Through my signature framework (I call it the Circadian Matrix™), I look at all the pieces of your health puzzle – your nutrition, sleep habits, genes, gut health, hormones, and daily routines – to find where things are out of sync. Many of my patients come to me not with a single diagnosis, but with a feeling that something “just isn’t right.” If that sounds familiar – maybe you’re exhausted despite doing “all the right things,” or your digestion and mood are off-kilter – aligning with your circadian biology can be a game-changer. By uncovering root causes and realigning your body’s clocks, we work to restore balance from the inside out.
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Ultimately, I want to empower you to become the healthiest version of yourself. That might mean finally waking up refreshed after years of poor sleep, having steady energy throughout the day, healing your gut, or simply feeling in tune with your body again. And if you’re a fellow health professional or organization, it means collaborating to push the boundaries of what integrative medicine can do.
Thank you for being here and taking the time to get to know me. I’m here to support you on your journey to better health – as a knowledgeable professional, a fellow human who’s passionate about wellness, and a partner in your growth. Let’s align and thrive together.
Transforming healthcare through inspiring Talks
I am regularly invited to share my expertise at international conferences, bringing forward new insights on precision medicine, circadian rhythms, and the gut microbiome.
"We were honored to welcome Adriano dos Santos, a leader in functional medicine and innovative research, to contribute to both our Integrative Healthcare & Applied Nutrition (IHCAN) Summit and IHCAN magazine.
At the summit, Adriano delivered a captivating lecture on 'Sleep Disruption, Metabolic Health, and the Gut Microbiome: How Light Exposure at Inappropriate Times Can Disrupt Our Health. Adriano translates complex scientific concepts into practical, actionable insights that advance integrative health. His expertise in sleep medicine, gut health, and metabolic syndromes, combined with his passion for improving patient outcomes, is truly inspiring.
We are deeply grateful for his contributions, which continue to shape the future of functional medicine."
— David Cann, Managing Director, Target Publishing Ltd
"Adriano dos Santos is an inspiring speaker who effortlessly conveys his passion and expertise to his audience. His enthusiasm is contagious, and his deep knowledge of health and nutrition is both motivating and enlightening. He has a unique ability to make complex topics accessible and actionable."
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Attendee IHCAN Summit 2024
Qualifications & degrees
Sleep Medicine (MSc)
Nutrition Science Degree (BSc Hons)
AFMCP (Applying Functional Medicine in Clinical Practice) at IFM (Institute for Functional Medicine)
DNA Testing Nutrigenomics
CPD Degrees
Publications & Research
Circadian Rhythms and the Gut Microbiome: Investigating the Impact of Dim Light in the Evening (Master’s Thesis, University of Oxford) Read here
