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维生素A对人类和某些动物具有表皮保护作用。有实验证明维生素A和其它胡萝卜素类物质对大鼠急性胃粘膜损伤具有保护作用。但维生素A并不抑制大鼠的胃酸分泌。对12名病人肌肉注射维生素A(10万单位/次)并不影响由五肽胃泌素(6微克/公斤体重)所致的基础胃酸分泌量和最大胃酸分泌反应。作者对60名慢性胃溃疡患者采用多重随机对照方
Vitamin A has epidermal protection in humans and certain animals. Some experiments have shown that vitamin A and other carotenoids on acute gastric mucosal injury in rats with a protective effect. However, vitamin A does not inhibit gastric acid secretion in rats. Intramuscular injection of vitamin A (100,000 units / dose) to 12 patients did not affect basal gastric acid secretion and maximal gastric acid secretion response due to pentagastrin (6 μg / kg body weight). The authors used multiple randomized controlled trials in 60 patients with chronic gastric ulcer