However, when we restricted our analysis to those subjects who were more skillful in HFP, as judged by the scatter in their data, an interesting trend emerged.
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Macular pigment response to a supplement containing meso-zeaxanthin, lutein and zeaxanthin.
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The sentences
There was a slight trend towards larger increases in L and Z+MZ in subjects whose pre-supplementation levels of these carotenoids were lower, but not at the level of statistical significance.