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Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
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Related Experiment Video

Updated: Jan 31, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
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The SMILES trial: an important first step.

Felice N Jacka1,2,3, Adrienne O'Neil4,5, Catherine Itsiopoulos6

  • 1IMPACT Strategic Research Centre, Deakin University, Geelong, VIC, Australia. f.jacka@deakin.edu.au.

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|December 29, 2018
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Summary
This summary is machine-generated.

The SMILES trial demonstrated dietary improvement as a viable treatment for depression. Strong correlations suggest a causal link, supporting nutritional psychiatry research.

Keywords:
DepressionDietNutritionRandomised controlled trial

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Area of Science:

  • Nutritional Psychiatry
  • Clinical Psychology
  • Public Health

Background:

  • The Study of Mental Illness and Malnutrition's Effect on Survival (SMILES) trial pioneered dietary interventions for depression.
  • Molendijk et al. questioned the large effect size, citing expectation bias and blinding issues.

Discussion:

  • While acknowledging blinding challenges, the study highlights a significant correlation between dietary changes and reduced depression scores.
  • This correlation suggests a potential causal relationship, countering the argument that it's solely an artifact of expectation bias.

Key Insights:

  • Dietary improvement shows promise as a treatment strategy for depression.
  • The SMILES trial's findings have been replicated, strengthening the evidence base.
  • Economic evaluations indicate benefits beyond depression symptom reduction.

Outlook:

  • The SMILES trial represents a foundational step in nutritional psychiatry.
  • Further research is warranted to explore the mechanisms and broader applications of dietary interventions in mental health.
  • The field of nutritional psychiatry is poised for significant growth and impact on public health.