Fatty fish like tuna contain healthy fats that feed the brain. The natural oils of these fish are full of Omega-3 fatty acids like DHA, which are essential for brain health. Eating salmon, tuna, and other fatty fish has been shown to stimulate brain cell growth. It also has links to improving mood and reducing stress, which can help improve cognitive ability. Additionally, the Omega-3s in salmon and tuna may reduce the risk of cognitive and memory disorders like dementia and Alzheimer’s disease.