From the publication:
We hypothesized that omega-3 fatty acids may be of value in improving cognitive dysfunction and enhancing BDNF levels in schizophrenia patients with metabolic syndrome.
[…]
There was a significant correlation between omega-3 fatty acid treatment and improved delayed memory.
Omega-3 fatty acids enhanced brain-derived neurotrophic factor levels after 12 weeks of treatment through suppressing TNF- levels.