@article{ref1,
title="Zinc deficiency: a cause of abnormal dark adaptation in cirrhotics",
journal="American journal of clinical nutrition",
year="1978",
author="Morrison, S. A. and Russell, R. M. and Carney, E. A. and Oaks, E. V.",
volume="31",
number="2",
pages="276-281",
abstract="Six stable alcoholic cirrhotics with serum zinc less than 70 microgram/100 ml had abnormal dark adaptation responses (mean dark adapted final threshold 3.2 +/- 0.6 versus 2.1 +/- 0.2 log lux in 21 age matched controls, P less than 0.01). Serum vitamin A ranged from 15 to 37 microgram/100 ml. Zinc sulfate (220 mg/day) was fed to three patients for 1 to 2 weeks and dark adapted final thresholds fell 0.9, 0.4, and 1.2 log lux without concurrent rises in serum vitamin A. Two patients were treated initially with oral vitamin A (10,000 IU/day) for 2 to 4 weeks, but their final thresholds fell to normal (2.1, 2.2 log lux) only after the addition of zinc for 1 to 2 weeks. The sixth patient, treated with vitamin A and zinc together, attained a normal final threshold in 2 weeks. The improvement in dark adaptation by zinc may be due to enhanced activity of previously depressed retinol dehydrogenase.<p /><p>Language: en</p>",
language="en",
issn="0002-9165",
doi="",
url="http://dx.doi.org/"
}