Consumer Attitudes and Food Labeling Open access Peer reviewed

The prosperity–mental health paradox: Ultra-processed foods as a plausible link

Carl Zhou, Nicholas Fabiano

Brain medicine : | Jul 15, 2026

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Using the Mental Health Quotient (MHQ), which combines metrics of mood, cognitive and emotional control, and social functioning, the authors found that scores declined with increasing UPF consumption and persisted after adjusting for physical activity, adversity/trauma, and income.

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In a recent cross-sectional study, Bala and colleagues observed that adults who reported more frequent consumption of ultra‑processed foods (UPFs), defined as industrial formulations containing little or no whole food, produced through multiple industrial processes, and containing additives, tended to report poorer mental well-being (1). Using the Mental Health Quotient (MHQ), which combines metrics of mood, cognitive and emotional control, and social functioning, the authors found that scores declined with increasing UPF consumption. This association persisted after adjusting for physical activity, adversity/trauma, and income. As the data are self‑reported and cross‑sectional, and the sample is not representative, the findings are associations, not evidence of causation.

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Carl Zhou

first | University of Ottawa | ORCID 0000-0002-1642-8349

Nicholas Fabiano

last | University of Ottawa

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BibTeX

@article{Zhou2026prosperity,
  title = {The prosperity–mental health paradox: Ultra-processed foods as a plausible link},
  author = {Carl Zhou and Nicholas Fabiano},
  journal = {Brain medicine :},
  year = {2026},
  doi = {10.61373/bm026v.0057},
  url = {https://doi.org/10.61373/bm026v.0057}
}

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