维生素A缺乏可导致夜盲、干眼病、角膜溃疡以至失明。因此,许多人把维生素A缺乏简单地看成仅仅与眼睛有关而已,似乎眼睛好的孩子不必担心维生素A缺乏。新近研究表明,小儿腹泻和呼吸道感染与维生素A缺乏密切相关。 1991年中国预防医学科学院营养与食品卫生研究所对河南省某贫困县村庄的205名1～5岁儿童进行检查,发现维生素A缺乏比较普遍,有47％的孩子血清维生素A含 Vitamin A deficiency can lead to night blindness, dry eye, corneal ulcers and even blindness. As a result, many people simply consider vitamin A deficiency as merely eye-related, and it seems that good-looking children do not have to worry about vitamin A deficiency. Recent studies have shown that children with diarrhea and respiratory infections are closely related to vitamin A deficiency. In 1991, the Institute of Nutrition and Food Hygiene, Chinese Academy of Preventive Medicine, examined 205 children aged 1 to 5 years in villages in a poor county of Henan Province and found that vitamin A deficiency was relatively common. 47% of children had serum vitamin A