Benade A J Spinnler
Nutritional Intervation Research Unit, Medical Research Council, Parow, South Africa.
Asia Pac J Clin Nutr. 2003;12(3):369-72.
There is general consensus that food-based approaches are viable and sustainable options for addressing vitamin A deficiency in populations. One such example is the fortification of food which, if properly monitored, could make a significant contribution towards improving the vitamin A status of populations throughout the world. Red palm fruit oil (RPO) with its high content of natural carotenoids, lends itself exceptionally well to this purpose at both household and commercial level. Results are now available from several feeding trials incorporating RPO into diets at household level or into commercially manufactured products. RPO in the maternal diet was shown to improve the vitamin A status of lactating mothers and their infants. Consumption of RPO incorporated in a sweet snack or biscuits significantly improved plasma retinol concentrations in children with subclinical vitamin A deficiency. There is evidence that if only 35-50% of the recommended daily intake for vitamin A were to be provided by RPO, it may be sufficient to prevent vitamin A deficiency (hypovitaminosis A). Red palm oil has a highly bioconvertible form of alpha- and beta-carotene, a long shelf life, and a higher cost/benefit ratio when compared to other approaches such as high-dose-vitamin A supplements and fortification of foods with retinyl ester fortificants. Consumption of RPO is safe and cannot produce hypervitaminosis A. Considering all the current information about RPO, the initiation of food-based interventions involving its use in developing countries with an endemic vitamin A deficiency problem, appears to be a logical choice.
人们普遍认为,基于食物的方法是解决人群维生素A缺乏问题的可行且可持续的选择。一个这样的例子是食品强化,如果进行适当监测,这可以对改善全世界人群的维生素A状况做出重大贡献。红棕榈果油(RPO)富含天然类胡萝卜素,在家庭和商业层面都非常适合用于此目的。现在已有多项喂养试验的结果,这些试验将RPO纳入家庭饮食或商业制造的产品中。结果表明,母亲饮食中的RPO可改善哺乳期母亲及其婴儿的维生素A状况。食用添加了RPO的甜味零食或饼干可显著提高亚临床维生素A缺乏儿童的血浆视黄醇浓度。有证据表明,如果RPO仅提供维生素A推荐每日摄入量的35-50%,可能就足以预防维生素A缺乏(维生素A缺乏症)。与其他方法如高剂量维生素A补充剂和用视黄酯强化剂强化食品相比,红棕榈油中的α-和β-胡萝卜素具有高度可生物转化的形式、保质期长且成本效益比更高。食用RPO是安全的,不会产生维生素A过多症。考虑到目前关于RPO的所有信息,在存在地方性维生素A缺乏问题的发展中国家启动涉及使用RPO的基于食物的干预措施似乎是一个合理的选择。