The supplement industry has long marketed krill oil as dramatically superior to fish oil, claiming bioavailability improvements of 2 to 8 times. However, rigorous clinical evidence tells a different story. When researchers at leading institutions conducted controlled trials with matched doses of omega-3 fatty acids (EPA and DHA), they found krill oil delivered only 9 to 30 percent higher plasma levels than conventional fish oil—far below marketing claims. The Yurko-Mauro randomized controlled trial, published in Lipids in Health and Disease, measured plasma omega-3 levels directly after four weeks of supplementation in 66 healthy adults. Despite these modest differences in absorption, krill oil commands a premium price of five to ten times more per gram of active omega-3 content. The evidence suggests consumers may be paying significantly more for negligible additional benefit.
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