Hedge funds left the stock in droves during the fourth quarter, with big names such as Third Point , Omega Advisors and Jana Partners liquidating their positions.

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The study results point to the possible role omega-3s play in the development and maintenance of the nervous system, says Lammi-Keefe, who recommends that pregnant women eat at least three servings of omega-3-rich fish every week.

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Another key point: Vascepa contains purified ethyl EPA, an omega-3 fatty acid, but does not contain significant amounts of docosahexaenoic acid, or DHA, another omega-3 fatty acid that is a major component of non-prescription fish-oil pills, as well as Lovaza.

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Albert Flynn, the chairman of the EFSA panel, says this point will be resolved when a product requires authorisation for a health claim derived from its omega-3 content, as only those products containing long-chain omega-3s are likely to be able to provide any evidence to support such claims.

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