Association Between Dietary Animal Protein and Depression in a General Population
1Department of Food and Nutrition, College of Health Science, Kangwon National University, Samcheok 25945, Gangwon, Republic of Korea.
Nutrients
|April 14, 2026
Summary
Animal protein intake may reduce depression risk, particularly in women and older adults. This study explored the link between dietary protein sources and mental health outcomes.
Area of Science:
- Nutritional Psychiatry
- Dietary Epidemiology
- Mental Health Research
Background:
- Conflicting evidence exists regarding the impact of protein sources on mental health.
- Understanding the differential effects of animal versus plant protein is crucial for public health.
Purpose of the Study:
- To investigate the association between animal or plant protein intake and depression.
- To determine if protein source modifies the risk of depression.
Main Methods:
- Utilized nationally representative survey data from 17,125 adults.
- Assessed depression using the Patient Health Questionnaire-9 (PHQ-9).
- Employed a 24-h dietary recall and weighted logistic models for analysis.
Main Results:
- Women in the highest tertile of animal protein intake showed a 36% lower likelihood of depression.
- No significant association was found among men.
- Older adults (over 65) showed a trend towards lower depression risk with higher animal protein intake.
Conclusions:
- Animal protein intake may be beneficial for reducing depression risk in the general population.
- Findings suggest a potential protective role of animal protein, especially in women and the elderly.
- Further research is warranted to confirm these associations.
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