Farmed salmon, long hailed as a rich source of heart-healthy Omega-3 fatty acids, may no longer deliver the nutritional punch we once thought. New research, led by USDA scientists, reveals a significant drop in these essential fats, suggesting that dietary guidelines based on outdated data might be misguided.

The decline, attributed to a shift in salmon feed from smaller fish species to plant-based oils, means that the advice to ‘eat more fatty fish’ might need a revision. This could have implications for recommendations from health agencies, including the American Heart Association.

‘These old figures are what are still used in their national dietary guidance,’ notes Laura Lee Cascada, director of the Aquaculture Accountability Project. ‘So in the meantime, it’s going to stay the same and people will have this wrong idea of how much Omegas they’re getting.’

The findings raise questions about the future of farmed salmon as a health food, particularly as demand for sustainable and nutritious foods continues to grow. A broader and more representative study is needed to fully understand the implications of this dietary shift.