A Pilot, Phase II, Observational, Case-Control, 1-Month Study on Asthenopia in Video Terminal Operators without Dry Eye: Contrast Sensitivity and Quality of Life before and after the Oral Consumption of a Fixed Combination of Zinc, L-Carnitine, Extract of Elderberry, Currant and Extract of Eleutherococcus

Nutrients. 2021 Dec 13;13(12):4449. doi: 10.3390/nu13124449. ABSTRACT The aims of the study were to investigate the ability and effectiveness of an oral intake of a...