Healthy Enough to Qualify

What “healthy participants” really tells us — and what it does

not

Nikos Drosakis Founder, MindHeaven A personal note on the space between diagnosis and optimal function — and why responsible supplementation begins by asking better questions, not by assuming everyone needs a bottle.

Healthy Enough to Qualify I have started noticing a phrase that appears almost everywhere in the research I read:

healthy participants.

Healthy adults.

Healthy volunteers.

Healthy men and women.

At first glance, the meaning seems obvious.

These are people without disease.

And if most of us are, statistically speaking, functioning reasonably normally, perhaps we should assume that this description applies to a large part of the population.

But the longer I work with scientific literature, the more I find myself asking a slightly uncomfortable question:

What exactly do we mean by healthy?

Because “healthy enough to enter a study” and “functioning at an optimally healthy physiological state” are not necessarily the same thing.

Healthy is often an operational definition In research, the word healthy usually serves a practical purpose.

A protocol defines inclusion and exclusion criteria.

A participant may be excluded because of diagnosed cardiovascular disease, psychiatric illness, diabetes, a particular medication, abnormal laboratory findings or another condition relevant to that specific experiment.

If none of those exclusions apply, the participant may qualify as healthy.

That is entirely reasonable scientifically.

Researchers need defined populations.

But it also means that healthy is not necessarily a comprehensive biological assessment.

Nobody has proved that every micronutrient is optimal.

Nobody has demonstrated that sleep is ideal.

Nobody has established that the person's metabolic state, stress physiology, diet, environmental exposures and every other dimension of health are functioning at some theoretical optimum.

The participant met the definition required by the experiment.

That is something different.

We have confused absence of diagnosis with presence of health This distinction interests me enormously.

Most of us do not wake up every morning and perform a complete biochemical assessment of ourselves.

We go to work.

We solve problems.

We have conversations.

We travel.

We raise families.

We exercise.

We become tired.

We recover.

We function.

And because we function, we tend to classify ourselves as healthy.

Perhaps reasonably so.

But human physiology has an enormous capacity to compensate.

A person can continue functioning while something is less than ideal.

That does not necessarily mean disease.

And it certainly does not mean that every deviation requires treatment or supplementation.

It simply means that health is probably better understood as a continuum than as a switch labelled:

healthy / sick.

Nutrition provides a good example

Consider magnesium.

NIH data show that many Americans consume less magnesium from food and beverages than recommended; one NHANES analysis cited by the NIH Office of Dietary Supplements found intake below the Estimated Average Requirement in 48% of the population studied. Yet the same NIH guidance makes an equally important point: symptomatic magnesium deficiency caused solely by low dietary intake is uncommon in otherwise healthy people, partly because the kidneys conserve magnesium.

I find that distinction fascinating.

Low intake is not the same as deficiency.

Deficiency is not the same as disease.

And being classified as healthy does not necessarily mean nutritional intake is optimal.

Vitamin D illustrates the same complexity from another direction. Dietary intake may often fall below recommended amounts, while most people still maintain sufficient blood concentrations because status also depends on factors such as sunlight exposure. NIH data also show that a minority of people do fall into ranges considered inadequate or deficient.

Reality refuses to fit into a binary category.

Stress complicates the picture further I would be careful with the fashionable claim that modern people simply have “too much cortisol.”

Cortisol is not a toxin.

It is an essential hormone.

And stress physiology is much more complicated than a single number moving upward.

But long-term stress can affect health, concentration, sleep, behaviour and physiological regulation; public-health guidance distinguishes normal occasional stress from chronic stress that can worsen health problems.

A person experiencing months of poor sleep, psychological pressure and inadequate recovery may still qualify perfectly well as a “healthy adult” in many research contexts.

That does not mean the person is ill.

But I also hesitate to describe that state as biologically ideal.

There is a large territory between disease and optimal function.

And much of modern life takes place there.

Then there is the environment We now have an extraordinary ability to measure what humans are exposed to.

Biomonitoring programmes track environmental chemicals in representative population samples. Their national exposure reports demonstrate something conceptually important: measurable environmental exposure exists across ordinary populations, not merely among people with obvious poisoning or occupational exposure.

But another distinction is essential.

Detection is not diagnosis.

Finding an environmental chemical in blood or urine does not automatically mean that it is causing disease at the measured concentration.

The same discipline should apply to microplastics.

Public-health organisations now treat plastics and health as a serious research area and recognise growing evidence of human exposure through ingestion and inhalation. At the same time, many questions concerning the health consequences of micro- and nanoplastic exposure remain unresolved.

This is exactly the kind of subject where I want MindHeaven to resist both extremes.

Not:

“There is nothing to worry about.”

But equally not:

“Everyone is poisoned and needs a detox supplement.”

Neither conclusion follows honestly from the current evidence.

The modern human is remarkably adaptable Perhaps this is what interests me most.

We live in an environment radically different from the one in which most of human physiology evolved.

Artificial light.

Sedentary work.

Constant information.

Highly processed food.

Interrupted sleep.

Long periods indoors.

Chronic psychological demands without a physical endpoint.

Environmental contaminants that did not exist at today's scale several generations ago.

And yet most people adapt remarkably well.

We continue functioning.

That adaptability is one of the most impressive properties of biology.

But adaptation and optimisation are not synonyms.

The fact that a system continues operating does not tell me that every parameter within that system is ideal.

As an engineer, I find this distinction intuitive.

A machine can remain within operational tolerance while several variables have moved away from their optimum.

You do not immediately declare the machine broken.

Nor do you assume that nothing could be improved.

You observe.

You measure.

You understand the system.

Then you decide whether intervention is justified.

I increasingly think about human performance in the same way.

And this is where supplements enter the conversation This is also where supplement companies usually make the intellectual jump I do not want MindHeaven to make.

They say:

modern life is imperfect,

therefore you have deficiencies, therefore you need supplements, therefore you need our supplement.

That sequence is commercially attractive.

Scientifically, it is far too convenient.

Not everybody needs every supplement.

A supplement cannot replace adequate food.

It cannot repair chronic sleep deprivation.

It cannot neutralise an unhealthy lifestyle.

It certainly should not be presented as a proven method of removing every environmental contaminant people are currently worried about.

Sometimes the correct intervention is:

food.

Sometimes:

sleep.

Sometimes:

exercise.

Sometimes:

less alcohol.

Sometimes:

medical diagnosis.

Sometimes:

nothing at all.

And sometimes, when there is a credible physiological rationale, appropriate evidence, an appropriate dose and an acceptable safety profile, supplementation may have a legitimate role.

That final sometimes is where I want MindHeaven to operate.

This changes the question Instead of asking:

“Why do healthy people need supplements?”

I prefer:

“What does health status fail to tell us about the

individual physiological question we are trying to

answer?”

That is much more interesting.

A participant can be healthy and still have low dietary magnesium intake.

A participant can be healthy and chronically sleep deprived.

Healthy and highly stressed.

Healthy and exposed to environmental contaminants.

Healthy and nutritionally excellent.

Healthy and metabolically suboptimal.

Healthy and extraordinarily resilient.

The label alone tells us surprisingly little.

It also changes how I read supplement studies If researchers say:

“The intervention produced no effect in healthy adults,”

I want to know who those adults were.

Were they nutrient sufficient?

What were their baseline levels?

Were they rested?

What was their diet?

Were they already performing near the ceiling of the cognitive test?

Perhaps the supplement truly does nothing.

That is entirely possible.

But perhaps the intervention is relevant only under deficiency, stress, sleep deprivation or another specific physiological condition.

That does not make the negative trial wrong.

It makes the population part of the result.

Likewise, if a supplement produces an effect in deficient participants, I do not automatically extend that benefit to healthy sufficient adults.

The boundary works both ways.

This is why baseline matters so much Increasingly, I think one of the great mistakes in supplementation is asking:

Does ingredient X work?

instead of:

For whom, under what baseline conditions, for which outcome, at what dose, and compared with what?

A person who lacks something and a person who already has enough of it may not respond identically.

Someone under acute stress and someone sitting comfortably after eight hours of sleep may not respond identically.

Biology has context.

The label healthy often removes that context precisely when we most need it.

I do not want to redefine everyone as sick That would be the easiest marketing strategy.

It would also be irresponsible.

I do not believe that everyone walking around without perfect nutrition, perfect sleep or perfect biomarkers should be medicalised.

Nor do I believe that normal variation needs a bottle.

Quite the opposite.

One of the purposes of building the MindHeaven Evidence Standard was to make it harder for us to turn an interesting biological possibility into a commercial necessity.

But I do think we should become more sophisticated about the word healthy.

Health is not merely the absence of a diagnosis.

Nor is it a mythical state in which every measurable parameter has reached an optimum.

It is dynamic.

Adaptive.

Context-dependent.

And often remarkably difficult to define.

Perhaps “healthy” is the beginning of the question Not the answer.

When I see performed on healthy participants in a study now, I no longer read it as:

“These people had nothing biologically relevant going

on.”

I read it as:

“These participants had no condition, characteristic or

abnormality that excluded them under this particular

protocol.”

Then I keep reading.

Because somewhere between obvious disease and theoretical perfection lies most of human life.

And, I suspect, most of the interesting questions about nutrition, cognition and supplementation as well.

Functioning normally is an impressive achievement of

the human organism.

It is not proof that every part of the system is

functioning optimally.

That distinction is not an argument for taking more supplements.

It is an argument for asking better questions.

And I think that is where responsible supplementation should begin.

Methodological References Selected primary public-health and regulatory sources underlying factual points in this essay. The article itself is a founder's commentary, not a systematic review.

FDA - Clinical Research

NIH Office of Dietary Supplements - Magnesium: Health Professional Fact Sheet

NIH Office of Dietary Supplements - Vitamin D: Health Professional Fact Sheet

CDC - Coping with Stress

CDC - National Report on Human Exposure to Environmental Chemicals

WHO - Plastics and Health Initiative

Evidence before formulation.