Norwegian research institute Nofima has proven that genetically modified rapeseed oil is suitable for fish feed, and the Norwegian Food Safety Authority has approved its use in salmon feed. The approval comes at a time when demand for marine Omega-3 fatty acids exceeds available supply and when fish oil in salmon feed has dropped from 30% to 10% since 2000. Nofima conducted trials on salmon at various stages of growth to prove the effectiveness of the genetically modified rapeseed oil.