By Chris Barnes, Epigenetic Longevity Strategist
I have three children. All three were genetically tested from birth.
That’s not something most parents do. And honestly, when I tell people that, the first reaction is usually surprise, sometimes scepticism. But here’s my thinking: if we know that the foundations of long-term health are being laid in those early years, why would we wait until something goes wrong to start paying attention?
That question sits at the heart of something I’ve been thinking about a lot lately. Something I think the entire longevity industry is getting wrong.
The industry is optimising the wrong end of the timeline
Here’s a thought experiment. Imagine two companies. The first is working to reverse biological age in adults, helping a 55-year-old achieve the cellular profile of someone 20 years younger. The second is trying to prevent a 10-year-old from arriving at 55 already metabolically broken.
Which one do you think is attracting the serious capital right now?
If you follow the longevity space, you already know the answer.
The first company has the hype, the investment, the magazine covers. The second barely has a category name. And that gap, between our obsession with reversing damage in adults and our near-total neglect of what’s creating that damage in children, is one of the most consequential blind spots in modern health.
We’re not just missing an opportunity. We’re actively undermining the longevity project by ignoring where it begins.
The numbers are not subtle
In Australia right now, approximately one in two children has at least one chronic condition. Not seasonal illness. A persistent, ongoing condition that will shape their development. One in nine has asthma. One in seven children aged four to 17 has a diagnosed mental health condition. Around a quarter of Australian kids are overweight or obese.
Globally, the trajectory is steeper. Autism diagnoses have shifted from roughly one in 150 children in the early 2000s to one in 36 today. Type 1 diabetes is rising at three to five percent annually. Childhood obesity has quadrupled since the 1970s.
The standard response is to reach for the most comforting explanation: better screening, broader diagnostic criteria, more awareness. That’s partially true. But it is not sufficient. The scale and speed of these shifts exceed what diagnostic expansion alone can account for. Something biological is changing in children.
The genome didn’t change. The expression did.
Human DNA has not meaningfully changed in 30 years. The sequence is essentially stable. What has changed, dramatically and measurably, is how that DNA is being read.
This is epigenetics. The layer of biological instruction that sits above the genome. The switches that determine which genes are expressed, to what degree and when. Unlike the genome, the epigenome is sensitive to environment. Nutrition, stress, chemical exposure, sleep, movement, all of it leaves marks on the epigenetic layer. Those marks shape biology. And in many cases, they are passed to the next generation.
The children being born today are not receiving the same epigenetic starting conditions as children born in 1990. Their biology is being expressed differently from earlier in development, in response to an environment that is unlike anything in our evolutionary history.
Four forces reshaping childhood biology
When you map the environmental shifts of the last three decades against the chronic disease data, four drivers emerge. Each serious in isolation. Compounding when combined.
The chemical environment: Microplastics have been detected in human blood, breast milk and placental tissue. Endocrine disruptors are embedded throughout food packaging, personal care products and children’s toys. Children are not small adults. Their developing hormonal, neurological and immune systems encounter these compounds at sensitive windows, where the downstream effects of disruption are disproportionately large and long-lasting.
Nutrition: Ultra-processed food now constitutes the majority of caloric intake for children in most Western countries. The micronutrient density of the food supply has declined substantially even in whole foods. The result is a generation eating more calories than any in history and being more chronically undernourished. The downstream effects — systemic inflammation, blood sugar dysregulation, gut microbiome disruption — don’t announce themselves dramatically. They accumulate. They become the baseline.
The gut microbiome: Early-life microbiome composition is now understood as a foundational variable in immune development, neurological function, mood regulation and metabolic health. And we are disrupting it systematically: rising C-section rates, early antibiotic use, reduced exposure to natural environments, ultra-processed diets. The gut-brain axis is one of the most active areas of mainstream biomedical research. And we are running a large, uncontrolled experiment on it in every child born in the developed world.
The nervous system: Children today are spending more time in a state of sympathetic nervous system activation than any generation we have data on. Screen time has expanded dramatically while unstructured outdoor play has collapsed. Sleep is consistently disrupted. The dopamine system is being shaped by platforms engineered to maximise engagement. Chronic low-grade stress is becoming the neurological default for childhood. And when the nervous system is locked in that state, nothing downstream functions well.
Conditions that used to present in adults in their forties and fifties are showing up in adolescents. This is not a statistical artefact. It is a biological signal.
The irony at the heart of longevity
The longevity field understands that biological age and chronological age are different things. That the damage accumulated across a life can be measured, tracked and potentially reversed. That insight is genuinely valuable.
But there is a deep irony in the current moment. We are deploying cutting-edge epigenetic science to help adults undo decades of accumulated damage, while the processes creating that damage in the next generation go largely unaddressed. We are focused on the repair shop while the manufacturing process deteriorates.
A child who arrives at adulthood with a well-functioning metabolic system, a diverse and stable microbiome, a regulated nervous system and minimal toxic burden doesn’t need the longevity stack. They’re already ahead.
What a serious response looks like
Population-level solutions matter. Better food policy. Reduced chemical exposure. Less screen time. All of that has value.
But children don’t respond identically to the same environmental inputs. Genetic predispositions determine how efficiently a child methylates toxins, how their immune system responds to microbiome disruption, how their dopamine system reacts to stimulus, how their body manages blood sugar and inflammation. Two children in the same home, eating the same diet, will have meaningfully different biological outcomes depending on their genetic architecture.
What this points toward is something the longevity field already understands for adults but hasn’t seriously applied to children: personalised, data-driven intervention. Genetic testing can establish predispositions early — not to create anxiety, but to create strategy. Epigenetic tracking can show what’s expressing right now, not just what the genome predicts.
The most powerful longevity intervention available is not a peptide protocol or a cold exposure practice. It is what happens, or doesn’t happen, in the first 18 years of a human life.
The question worth asking
The longevity industry will keep growing. The science will keep improving. People will live longer and some of that will be because of the work being done right now on biological age reversal. That deserves to be celebrated.
But if the cohort entering adulthood over the next two decades is starting that journey more inflamed, more chemically burdened, more metabolically compromised and more neurologically dysregulated than any generation before them, then we have not solved the problem of human healthspan. We have shifted it. We have made it more expensive, more medicalised and harder to address.
The longevity conversation needs a longer time horizon. Not just how we extend the back end of a human life, but what we are building at the front end.
That is the question the field is not asking loudly enough. And it is the one that matters most.
If this resonates with where you are right now
Most of the adults I work with come to genetics because something in their health hasn’t responded the way it should. The protocols aren’t working. The markers aren’t moving. The energy isn’t there.
What we usually find is that the answer was upstream the whole time.
If you want to understand what your genes are actually expressing right now — not just what they predict, but how your biology is performing in real time — the place to start is a conversation.
I work with a small number of clients each month on a one-to-one basis. Before we do anything else, we talk. No obligation, no pressure, just a clear picture of whether what I do is actually the right fit for where you are.
Book a call: chrisbarneswellness.com.au
Or if you’re earlier in the process and want to understand epigenetics before committing to anything, the SKOOL community is where I share the thinking behind the work. Free to join, no obligation.
Chris Barnes is an Epigenetic Longevity Strategist. With 20+ years of experience, 500+ genetic reports analysed, and a keynote stage shared with David Sinclair, Dave Asprey, and Wim Hof, he has spent two decades understanding why the body does what it does and building the systems to do something about it.
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