Loughman J, Nolan JM, Howard AN, Conolly E, Meagher K, Beatty S. Investigative Ophthalmology and Visual Science. November 2012.
Link to Study: The impact of macular pigment augmentation on visual performance using different carotenoid formulations. Loughman J, Nolan JM, Howard AN, Conolly E, Meagher K, Beatty S. Investigative Ophthalmology and Visual Science. November 2012.
Summary: Only Xanthoight showed effectiveness for increased macular pigment (at 3 and 6 months) in macular pigment and visual performance as compared to other lutein and zeaxanthin formulas.