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Storage in opaque containers provides light protection without individual vial wrapping

I don't know if that study's released yet

de Morree HM, Klein C, Marcora SM (2014) Cortical substrates of the effects of caffeine and time-on-task on perception of effort

Siglioccolo A, Petrosino G, Galardo A, Vinciguerra C, Romanelli A, Gammaldi R
