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[ 會員#15991 ] Kobe11

有關葉酸

病患者女 - 27歲

你好!我在網上看到有關葉酸會影響到鋅的吸收,部分本身就缺乏鋅的人或會因而缺乏鋅會影響胎兒生長,想問此資訊是否正確?
如正確,我曾因胎兒沒心跳而流產一次,目前正在再備孕,是否應該先驗血再食用葉酸?
如不正確,因醫生說懷孕前三個月補充葉酸即可,但若食超過三個月會有問題嗎?(因未能於三個月內懷孕)
另外,想問子宮後傾是否會影響懷孕機率?
萬分感謝!
Hello Kobe11,


1. If I could share with you this link which is very comprehensive about folate safety, dosage, interactions,

http://www.mayoclinic.org/drugs-supplements/folate/safety/hrb-20059475

2. Besides, for zinc absorption- there are many factors as illustrated by this abstract from a paper,

J Nutr. 2000 May;130(5S Suppl):1378S-83S. Dietary factors influencing zinc absorption.
Lönnerdal B1.
Abstract

Marginal zinc deficiency and suboptimal zinc status have been recognized in many groups of the population in both less developed and industrialized countries. Although the cause in some cases may be inadequate dietary intake of zinc, inhibitors of zinc absorption are most likely the most common causative factor. Phytate, which is present in staple foods like cereals, corn and rice, has a strong negative effect on zinc absorption from composite meals. Inositol hexaphosphates and pentaphosphates are the phytate forms that exert these negative effects, whereas the lower phosphates have no or little effect on zinc absorption. The removal or reduction of phytate by enzyme (phytase) treatment, precipitation methods, germination, fermentation or plant breeding/genetic engineering markedly improves zinc absorption. Iron can have a negative effect on zinc absorption, if given together in a supplement, whereas no effect is observed when the same amounts are present in a meal as fortificants. Cadmium, which is increasing in the environment, also inhibits zinc absorption. The amount of protein in a meal has a positive effect on zinc absorption, but individual proteins may act differently; e.g., casein has a modest inhibitory effect of zinc absorption compared with other protein sources. Amino acids, such as histidine and methionine, and other low-molecular-weight ions, such as EDTA and organic acids (e.g., citrate), are known to have a positive effect on zinc absorption and have been used for zinc supplements. Knowledge about dietary factors that inhibit zinc absorption and about ways to overcome or remove these factors is essential when designing strategies to improve the zinc nutrition of vulnerable groups.

3. In general, if you belong to an average-risk lady preparing to conceive, perhaps start folic acid 400-600mcg daily soon (you won’t know when you will conceive), and maintain well-balanced meals and healthy lifestyle

Last but not the least, all the best for conception and pregnancy!

Best regards,

Dr Ong Yeu Theng Charas
Specialist in Obstetrics & Gynaecology
以上資料只供參考,不能作診症用途,
請與家庭醫生查詢並作出適合治療。
如有身體不適請即求診,切勿延誤治療。
若資料有所漏誤,本網及相關資料提供者恕不負責。



[ 會員#17234 ] Yam sin ting : 你好,我每次有性行為後,會陰都有裂開,雖不太深,但都痛,是什麼原因
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