PURPOSE: Past studies have shown that higher @entity2118 ( @entity2118 ) and @entity8665 (L) and @entity7695 (Z) supplementation are related to improvements in @entity717 , photostress recovery, and chromatic contrast. This study assessed those links using a randomized, double-blind, placebo-controlled design. METHODS: The visual effects of 1 year of supplementing L (10 mg/d) and Z (2 mg/d) were investigated. One hundred fifteen young, healthy subjects were recruited and randomized into the study (58 received placebo, 57 L+Z). Several dependent measures were collected at baseline and then once every 3 months: serum L and Z measured by HPLC chromatography; @entity2118 measured using customized heterochromatic flicker photometry; photostress recovery assessed by measuring the time needed to recover visual acquisition of a grating target after 30 seconds of an intense xenon white flash exposure; @entity717 evaluated as the energy in a surrounding annulus necessary to veil a central grating target; and chromatic contrast assessed by measuring thresholds for a yellow grating target superposed on a 460-nm background. RESULTS: Macular pigment optical density increased significantly versus placebo at all eccentricities (10, 30, 60, and 105 minutes from the center of the macula). Serum L and Z also increased significantly by the first follow-up visit (at 3 months), and remained elevated throughout the intervention period of 1 year. Chromatic contrast and photostress recovery time improved significantly versus placebo. Glare disability was correlated with macular pigment density throughout the study period but did not increase significantly in the treated group. CONCLUSIONS: Daily supplementation with L+Z resulted in significant increase in serum levels and @entity2118 and improvements in chromatic contrast and recovery from photostress. These results are consistent with past studies showing that increasing @entity2118 leads to improved visual performance. (ClinicalTrials.gov number, NCT00909090.).

A double-blind, placebo-controlled study on the effects of @entity8665 and XXXX on photostress recovery, @entity717 , and chromatic contrast.

@entity717 :: ('MESH:D009069', 'Disease') :: ['glare disability'] @entity2118 :: ('MESH:D010859', 'Disease') :: ['MPOD', 'macular pigment optical density'] @entity7695 :: ('MESH:C005881', 'Chemical') :: ['zeaxanthin'] @entity8665 :: ('MESH:D014975', 'Chemical') :: ['lutein']
@entity7695 :: (MESH:C005881,Chemical) :: ['zeaxanthin']
