Food Psych Podcast with Christy Harrison

"Food Addiction" + Ultraprocessed Foods + Disordered Eating with Marci Evans

Sep 4, 2025
Marci Evans, an Eating Disorders Dietitian and Food and Body Image Healer®, dives deep into the science of food addiction, particularly regarding ultraprocessed foods. She explores how food addiction is defined and measured, and the overlap between disordered eating and addiction. Marci discusses the stigma surrounding weight and food, along with the complexities of recent research, including brain imaging studies. Practical insights on cultivating a healthier relationship with food are shared, emphasizing personalized strategies to aid those who struggle with addictive-like eating behaviors.
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INSIGHT

Ultraprocessed Is More Specific But Still Vague

  • Researchers shifted from vague 'food' to 'ultra-processed food' as the target of addiction claims.
  • Yet NOVA categories remain broad and inconsistent, so specificity about what is 'addictive' is still lacking.
INSIGHT

Substance vs Process Debate

  • The field debates whether this is a substance addiction or a process addiction.
  • Ultra-processed framing assumes a substance-like mechanism, but the causal agent remains unclear.
INSIGHT

YFAS Is Central But Incomplete

  • The Yale Food Addiction Scale (YFAS) dominates human research as a subjective diagnostic tool.
  • Researchers often pair YFAS with neuroimaging but clinical context is usually missing.
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