Euphausia pacifica emulsified oil powder improves sleep quality in partially sleep-restricted healthy volunteers.

This article focuses on a randomized, double-blind, placebo-controlled trial investigating the effects of North Pacific (NP) krill (Euphausia pacifica) emulsified oil powder on sleep quality in healthy adults with partial sleep restrictions. The NP krill oil, rich in marine n-3 polyunsaturated fatty acids (EPA and DHA) and 8R-hydroxy-eicosapentaenoic acid (8R-HEPE), was found to significantly reduce morning drowsiness and improve fatigue recovery, particularly in women and participants aged 40 and above. Objective sleep monitoring indicated increased sleep duration and REM sleep proportions in older age groups consuming the krill oil powder. The study suggests that components like 8R-HEPE may influence sleep quality through mechanisms involving PPARα activation, though the precise pathways remain to be clarified. No adverse effects were reported, highlighting NP krill emulsified oil powder as a potential supplement for enhancing sleep quality in populations prone to insomnia.