Fish is rich in multiple beneficial nutrients, including n-3 polyunsaturated fatty acids, high-quality protein, vitamins, and minerals.
Significant Protective Effect of fish consumption on depression was found in an analysis of 26 studies involving 150,278 participants. Ten studies were conducted in Europe, seven in North America, four in Asia, three in Oceania, and two in South America.
Twelve of the 26 studies showed a significant association between fish consumption and depression; the other 14 indicated no association. All ten studies in Europe showed a positive association.
The significant association in European studies is probably influenced by the fact that there are more studies with larger sample size.
Different types of fish were not identified.
The studies referred to dietary fish intake, not fish oil supplements.