A major double-blinded, randomized, placebo-controlled study published in 1995 assessed the bioavailability of the five most common fish oil concentrates––rTG, EE, FFA, fish body oil (FBO) and cod liver oil (CLO).In this study, 72 healthy subjects received daily doses of one of the five fish oil preparations or a corn oil control supplement for two weeks. The researchers estimated that all subjects received an average of 3.34 g of EPA and DHA per day. The patients were examined in the morning following an overnight fast at both baseline and two-week follow-up.