By Michael J. Critelli | MakeUsWell Newsletter, 

Why controlled experiments and better food transparency can help us understand what we eat

My wife and I recently returned from Egypt with an unexpected discovery that challenged our assumptions about food sensitivities.

At home, my wife frequently experiences problems after eating chicken. I often experience bloating after eating bread, whether freshly baked or commercially packaged.

Yet in Egypt, my wife comfortably ate chicken, and I consumed substantial amounts of pita bread without bloating.

We ate at hotel buffets and restaurants, consuming as much or more food than we ordinarily eat at home.

What was different?

We don't know. But our experience reminded me that we should approach nutritional problems more like scientists, conducting controlled experiments to identify their root causes rather than simply eliminating foods we believe are responsible.

From Assumptions to Testable Hypotheses

My wife has a theory about her chicken intolerance. She believes she may have a soy allergy triggered by eating American chicken raised on feed containing soybeans.

This is a hypothesis, not an established fact. Research has not demonstrated that soy proteins from poultry feed ordinarily transfer into chicken meat at levels sufficient to cause allergic reactions.

Nevertheless, her experience raises questions worth investigating. Could differences in how chickens are raised, processed, prepared, or served explain her symptoms?

Perhaps the chicken itself isn't responsible. Marinades, sauces, seasonings, cooking fats, or accompanying foods may be contributing factors.

Similarly, I might assume gluten causes my bloating. But Egyptian pita contains gluten, and I ate plenty of it without discomfort.

Could differences in wheat varieties, flour composition, fermentation, or fructan content explain my experience? Or did other aspects of our meals and daily routines matter?

The first principle of controlled experimentation is to distinguish what we know from what we merely suspect.

Becoming Our Own Nutritional Scientists

We often associate controlled experiments with laboratories and universities. Yet we can apply many of the same principles to our daily eating decisions.

Whether working independently or consulting physicians, nutritionists, or registered dietitians, we can participate actively in investigating our responses to food.

First, identify a specific problem and develop competing explanations.

Second, determine which variables can safely be isolated.

Third, change one variable at a time while keeping other conditions as consistent as possible.

Fourth, document symptoms, timing, portions, preparation methods, and other potentially relevant circumstances.

Finally, repeat comparisons to distinguish meaningful patterns from coincidence.

For my wife, this might begin with examining ingredients and preparation methods for chicken dishes she tolerates versus those that have negative effects. If allergy concerns are appropriately evaluated, further comparisons could examine chicken from different sources, prepared identically.

For me, experiments might compare Egyptian-style pita with other breads, controlling portions and accompanying foods while investigating flour composition and fermentation.

These experiments will not provide laboratory-level certainty. Suspected allergies should be evaluated professionally, and deliberately consuming a suspected allergen is not an appropriate home experiment. Persistent digestive symptoms also warrant medical assessment.

However, systematic observation can make our investigations far more productive.

Better Food Transparency Makes Better Experiments Possible

Meaningful experimentation depends on knowing what we are actually consuming.

The European Union generally requires more standardized identification of food additives, including their functions and specific names or E-numbers, than the United States. Both jurisdictions require ingredient disclosure, and U.S. rules also require identification of chemical preservatives and their functions.

European requirements can make it easier to recognize particular additives and compare otherwise similar products.

Yet even detailed ingredient labels leave significant gaps.

Neither American nor European labels ordinarily disclose the specific feed consumed by the animals whose meat we purchase. Processing methods, ingredient quantities, and other production details may also be unavailable.

Without this information, consumers may struggle to isolate the variables that explain different physiological reactions.

Greater food transparency does not establish causation, but it makes controlled experimentation more informative.

It also strengthens the argument for improving disclosure throughout the food supply chain.

Moving from Food Avoidance to Food Intelligence

Too much nutritional advice focuses on identifying foods to eliminate.

But avoiding a food may relieve symptoms without revealing their causes. It may also unnecessarily restrict dietary choices.

What if we approached nutrition as an ongoing investigation?

Artificial intelligence could help individuals formulate hypotheses, identify missing information, design safe comparisons, document results, and recognize patterns that might otherwise escape notice.

Healthcare professionals could then use these observations to guide more targeted evaluations and recommendations.

The objective would be to help individuals understand not simply which foods cause discomfort, but why seemingly identical foods produce different consequences under different circumstances.

Our Egyptian experience did not resolve our food sensitivities. It gave us something potentially more valuable: a reason to question our assumptions and investigate them systematically.

Sometimes the path to better nutrition is not eliminating another food.

It is designing a better experiment.