Two people eat the same banana. One gets a steady, easy lift in energy. The other gets a blood sugar spike and feels worse an hour later. Same fruit, same portion, same morning, completely different bodies underneath. Neither of them is broken. They’re just not the same person, and no amount of blanket advice was ever going to predict which one would happen to which.
This is the part of health that’s easiest to forget when the advice online is so confident and so uniform: sleep seven to nine hours, eat more vegetables, exercise regularly. None of that is wrong. It’s just not the whole story, because the whole story runs all the way down to how our individual DNA is expressed, how our microbiome is composed, and how our bodies, specifically, respond to the same inputs everyone else is being told to follow.
What the Science Now Shows
This isn’t just intuition anymore. One of the largest studies of its kind tracked continuous blood sugar in 800 people over a week, covering nearly 47,000 meals, and found wide, consistent variability in how different people’s blood sugar responded to identical food. Two people, same meal, different physiological outcomes, predictable not by the food alone but by the person eating it: their microbiome, their activity levels, their individual biology. It’s the banana example, run through a lab. The wider field of personalised nutrition research has been building on exactly this finding since, arguing that population-level dietary guidelines, useful as a starting point, have real limits once you’re trying to solve for one specific body rather than an average one.
Blanket Recommendations Are What We Mostly Get Anyway
Our medical system, and most health advice online, still runs largely on a one-size-fits-all model. That’s not because it’s malicious or lazy; population guidelines have to start somewhere; they’re a useful floor. But when general guidance gets treated as a universal solution rather than a starting point, the individual disappears from the picture. And once the individual disappears, so does any real chance of understanding what’s actually driving their specific challenges.
What Personalisation Isn’t
It’s worth being direct here: personalisation isn’t an excuse to skip the fundamentals. “Exercise doesn’t work for me” or “I just don’t need much sleep” are, in most cases, not expressions of unique biology. They’re ways of avoiding what’s hard. Personalisation works within the non-negotiables of human health, not around them. The foundations still apply to everyone; what changes is how each of us meets them, given who we are and how we live.
The Ancient Wisdom That Got There First
Ayurveda, one of the world’s oldest continuous medical traditions, has organised its entire approach around this exact idea for thousands of years, through the concept of the three doshas, Vata, Pitta, and Kapha, the distinct constitutional types believed to shape how each person responds to food, stress, movement, and the seasons themselves. Two people were never expected to thrive on the same protocol. The whole system was built around identifying which one you are, and working with that, not against it. Centuries before microbiome testing existed, a Roman-era proverb captured the same instinct more bluntly: “one man’s food is another man’s poison.” It’s easy to say. It took modern glucose monitors to actually prove it.
Where Personalisation Gets More Possible
The tools available for this are always improving. Gene testing, microbiome analysis, continuous glucose monitors, and direct-to-consumer health tests are making it increasingly possible to understand our own biology with a level of nuance that simply wasn’t accessible a generation ago. Interpreting the results still requires care, context, and a healthy amount of caution around anyone selling certainty, but the direction of travel is a net positive: a growing, evidence-backed recognition that treating people as individuals isn’t a luxury, it’s a necessity.
The order matters here too. Lifestyle interventions first: sleep, nutrition, movement, mindfulness. Natural therapies next. Medical or surgical intervention when it’s genuinely required. All of it, ideally, tailored to the actual person in front of us, not the average person in a study.
Where the Line Is
Personalisation is not a licence to self-diagnose your way out of professional care, especially for anything serious or ongoing. Interpreting genetic or microbiome data without guidance can create as much confusion as clarity. And nothing here overrides urgent or acute medical need: if something requires immediate attention, that always comes first, personalisation or not.
TL;DR
We are not the same, all the way down to how our DNA expresses itself and how our microbiome is built, and a landmark glucose study proved it with hard data: identical meals, genuinely different responses, person to person. Blanket health advice is a useful starting point, not a universal solution, and personalisation only works when it’s built on the fundamentals, not used to dodge them. Ayurveda organised an entire medical system around this idea long before we had the lab tools to confirm it. There is no average person. There’s just you.
Go Deeper
This principle is one of six that make up the AWMS framework. If it resonates, all six principles can be found together in The 6 Foundations of Holistic Health, a free guide you can download and keep as a starting point for navigating your own health.
Key Takeaways on Personalised Health
- Scientific Validation: Research reveals that identical meals trigger different blood sugar responses in different bodies based on your microbiome and biology.
- Population Guidelines vs Personal Needs: Standard health advice provides a helpful baseline, but it ignores your unique daily responses.
- Fundamentals Remain Essential: Customising your approach works alongside core healthy habits like sleep and movement, never as an excuse to ignore them.
- Ancient Traditions Identified It Early: Ayurvedic practices long recognised individual body types, matching what modern glucose monitors now prove.
- Modern Testing Tools: Tools like continuous glucose monitors give you direct feedback on your unique response to food and lifestyle habits. You can use platforms like AWMS to expand your knowledge on these topics.
- Know Your Limits: Personal health insights complement medical care rather than replacing expert diagnosis when serious conditions arise.
FAQs for Health Is Personalised: Why One-Size-Fits-All Advice Fails
Why does identical food affect people differently?
Your unique gut microbiome, genetics, stress levels, and daily activity alter how your body processes nutrients. Even simple foods like bananas cause distinct blood sugar responses in different bodies.
Does personalised health mean standard advice is useless?
No. Broad health advice offers a helpful baseline for foundational habits. However, adjusting those guidelines to your unique physiological responses helps you discover what actually helps your body thrive.
How did ancient systems address individual health needs?
Traditions like Ayurveda identified unique body types centuries ago to match diets and habits to individual traits. Modern scientific testing now validates this ancient concept through measurable blood glucose and genetic data.
Can you test your body’s individual responses at home?
Yes, tools like continuous glucose monitors, microbiome kits, and direct health tests offer direct visibility into your biology. Studying resources on AWMS can help you make sense of basic wellness principles alongside these modern tools.
This is a framework born from lived experience, not medical advice, and is for informational purposes only, even if and regardless of whether it features the advice of physicians and medical practitioners. This article is not, nor is it intended to be, a substitute for professional medical advice, diagnosis, or treatment and should never be relied upon for specific medical advice. If something here raises questions about your own health, please visit a qualified professional.
