Consumer demand for salmon has risen sharply in recent years, leading to increased production. Today, nearly 70% of the world's salmon is farmed rather than caught from the wild. The U.S. Department of Agriculture (USDA) recommends that Americans eat at least 8 ounces of fish per week, including salmon, due to its high content of Omega-3 fatty acids, which are beneficial for heart and brain health. However, new research led by USDA scientists suggests that the Omega-3 levels in farmed salmon have significantly declined over time, raising questions about whether current dietary guidelines remain accurate. Laura Lee Cascada, director of the Aquaculture Accountability Project, pointed out that the figures used in national dietary advice might give people an inaccurate sense of how much Omega-3 they are actually consuming. The study’s authors, however, cautioned that the sample size used in their research was not large enough to justify changing official government recommendations. They emphasized the need for a more comprehensive and representative study before any changes are made. The USDA did not respond to requests for an interview or provide answers via email. The decline in Omega-3 levels in farmed salmon is linked to changes in the fish’s diet. Previously, farmed salmon were fed smaller fish, which are naturally rich in Omega-3s. Today, many farms use plant-based oils and crops like soy and canola, which contain lower levels of these nutrients. A 2016 study also found similar declines in Omega-3 content, attributing them to this shift in feed sources. This research highlights a growing concern about the nutritional value of farmed fish as aquaculture practices evolve. While farmed salmon remains a popular and accessible source of protein, its changing composition may affect its health benefits. Experts suggest that further studies are needed to fully understand the implications of these changes for public health and dietary guidelines.