Center for Human Nutrition, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
J Nutr. 2010 Jan;140(1):201S-7S. doi: 10.3945/jn.109.112730. Epub 2009 Nov 25.
Dietary quality and diversity reflect adequacy of vitamin A. Both can deteriorate in response to economic crises. Although the nutritional consequences of the 2008 world food price crisis remain unclear, past studies of diet, status, and socioeconomic standing under usual (deprived) and unusually disruptive times suggest dietary quality and vitamin A status decline in mothers and young children. This is presumably the result of shifting diets to include less preformed vitamin A-rich animal source foods and, to a lesser extent, vegetables and fruits. Cross-sectional assessments of diet, deficiency, and socioeconomic status in a number of countries and surveillance data collected during the Indonesian economic crisis of 1997-8 indicate that the prevalence of vitamin A deficiency, night blindness, and other related disorders (e.g., anemia) may have increased during the 2008 crisis, and that it might not have necessarily recovered once food prices waned later in 2008. Lost employment may be a factor in slow nutritional recovery, despite some easing of food prices. Vitamin A deficiency should still be preventable amid economic instabilities through breast feeding promotion, vitamin A supplementation, fortification of foods targeted to the poor, and homestead food production that can bolster income and diversify the diet.
膳食质量和多样性反映了维生素 A 的充足程度。两者都可能因经济危机而恶化。尽管 2008 年世界粮食价格危机的营养后果仍不清楚,但过去在通常(贫困)和异常动荡时期对饮食、状况和社会经济地位的研究表明,母亲和幼儿的膳食质量和维生素 A 状况下降。这大概是由于饮食转向包括较少的预先含有丰富维生素 A 的动物源食品,以及在较小程度上包括蔬菜和水果。对许多国家的饮食、缺乏和社会经济地位的横断面评估,以及在 1997-8 年印度尼西亚经济危机期间收集的监测数据表明,维生素 A 缺乏、夜盲症和其他相关疾病(如贫血)的流行率可能在 2008 年危机期间有所增加,而且一旦 2008 年后期食品价格下降,这种情况可能不一定会恢复。尽管食品价格有所缓解,但失业可能是营养恢复缓慢的一个因素。在经济不稳定时期,通过促进母乳喂养、补充维生素 A、对贫困人群的食品进行强化以及可以增加收入和使饮食多样化的家庭食品生产,仍可预防维生素 A 缺乏症。