Abstract
The effects of dietary zinc deficiency on voluntary alcohol drinking in rats were examined in three separate experiments. Zinc-deficient rats showed a significantly greater voluntary alcohol intake as compared with the pair-fed controls. In the first experiment there were 14 male Sprague-Dawley rats with 7 controls and 7 who were begun on a zinc-deficient diet (below 2 ppm) at body weight 58-81 g. In the second experiment with 11 male Sprague-Dawley rats, the same diet was begun at 103-107 g. In the last experiment, 11 rats were begun at 120-199 g. Hair zinc measurements documented lower levels in the zinc-deficient rats after 6 weeks on the diet. The data indicate that a zinc-deficient state did increase voluntary alcohol intake in rats. In each experiment, the per cent alcohol consumed declined when a normal diet was given after the 6th week, and the difference was significant in experiments 1 and 3.
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