Rossander-Hulthén L, Gleerup A, Hallberg L
Department of Medicine, University of Göteborg, Sahlgren's Hospital, Sweden.
Eur J Clin Nutr. 1990 Nov;44(11):783-91.
Oat products are increasingly used in human nutrition due to the rather high content of soluble fibre. Oat products, however, have a high content of phytate which may interfere with the absorption of non-haem iron. The iron balance situation is critical in several groups, especially in children, teenagers and women in their fertile years. It is therefore important to examine the effect of oat products on non-haem iron absorption in man. The present studies showed that oat bran and oat porridge markedly inhibited the absorption of non-haem iron. The inhibition can be explained by the high phytate content of oat products. This is partly due to a high resistance of oat phytate against exogenous phytase and partly to an inactivation of the endogenous phytase in oats caused by the usual heat treatment of oats which is made to prevent rancidity of oat lipids during storage. The inhibitory effect of oat products on iron absorption is sufficiently marked to be a serious consideration if such products are more regularly consumed.
由于可溶性纤维含量较高，燕麦产品在人类营养中的应用越来越广泛。然而，燕麦产品中植酸盐含量很高，可能会干扰非血红素铁的吸收。铁平衡状况在几个群体中至关重要，尤其是儿童、青少年和育龄妇女。因此，研究燕麦产品对人体非血红素铁吸收的影响很重要。目前的研究表明，燕麦麸和燕麦粥显著抑制非血红素铁的吸收。这种抑制作用可以用燕麦产品中高含量的植酸盐来解释。部分原因是燕麦植酸盐对外源植酸酶具有较高抗性，部分原因是燕麦通常的热处理导致燕麦内源性植酸酶失活，而这种热处理是为了防止燕麦脂质在储存期间酸败。如果更经常食用此类产品，燕麦产品对铁吸收的抑制作用十分显著，足以成为一个需要认真考虑的问题。
