叶酸的剂量

小牛王

想问关于Folic Acid的剂量。因为我在Pharmacy买的剂量是5mg，可是吃了两个月后刚刚上网看，却说正确的剂量应该是0.4mg，多吃不好。

想请问各位怀孕的姐妹，你们的妇产科医生开的是多少剂量吗？到底多少才最好呢？
谢谢各位。
网上这么说：

不过，用“叶酸片”代替叶酸增补剂，如果“叶酸片”每片含叶酸５毫克，其叶酸含量是叶酸增补剂的12.5倍，就不合适了。5毫克的用于治疗贫血，如果孕妇长期服用高浓度的叶酸，不但起不到预防胎儿畸形的作用，反而会对孕妇和胎儿造成不良后果。因为服用过多，甚至长期过量服用，会干扰孕妇的锌代谢，锌元素的不足，同样会影响胎儿发育。

因此特别提醒怎么算是适量? 准妈妈孕前每天用叶酸0.4毫克，孕后每天0.4——0.8毫克。

belle888

怀孕都是吃5mg，但只吃前面几个月，中期和后期不用吃了。

利学零

我因为感冒去看医生，医生听我说我可能怀孕了，也是给我5mg的叶酸。。。

藤原佐为

回复 1# 小牛王

本地市场售卖的多数是5mg。要找0.4mg的，你可以在watson/guardian买Appeton:




http://www.appeton.com/site-eng/products/mother/faq_folicacid.html

我以前是吃这个。

prettybabes5

政府医生也是给我5MG的..

小牛王

谢谢大家的资料。当初我是因为备孕时到pharmacy买叶酸，那pharmacist就直接给我5mg的。
之后怀孕了，我和医生说我家里还有叶酸，他就说那继续吃好了，也没问我是多少剂量的。

前两天无意中在网上看到，好像过量了。
查了所有可靠的英文网站，甚至是美国Health Department(No.10)，也是说备孕或孕妇叶酸的剂量每天不可多过1mg。

Top 10 Facts About Folic Acid Your Women Patients Should Know http://www.health.state.ny.us/publications/1340/

1）Each year, about 130 babies who are born in New York State have neural tube defects (NTD). Nationwide, there are 4,000 NTD-affected pregnancies each year. NTDs are disorders of the development of the brain and spinal cord. The most common NTD is spina bifida, or opening of the spine. The most serious NTD is anencephaly, failure of the brain to develop.

2）Up to 70 percent of NTDs can be prevented if all women who can become pregnant consume 0.4 mg/day of folic acid at least a month prior to conception and during the first trimester of pregnancy.

3) Folic acid is a B vitamin that is used by the body to manufacture DNA. DNA is required for rapid cell division and organ/tissue formation in the developing baby.

4) Folic acid can only help prevent NTDs during the first weeks of pregnancy, usually before a woman even knows she's pregnant. In fact, since 50 percent of pregnancies are unplanned, all women who are sexually active and of child-bearing age should consume folic acid every day, even between pregnancies.

5) Two-thirds of women in the United States report consuming insufficient levels of folic acid. There are three ways women can get enough folic acid: Take a vitamin supplement containing 0.4 mg folic acid daily. Eat a fortified breakfast cereal daily which contains 100% of the recommended daily amount of folic acid. Increase consumption of foods fortified with folic acid.

6) Folic acid-rich foods include: fortified breakfast cereals; enriched bread, rice, pasta and other grain products; orange juice; green vegetables; and legumes such as navy beans, kidney beans, lentils and garbanzo beans. A large glass of orange juice and a bowl of fortified cereal will provide 50-100% of the recommended daily amount of folic acid.

7) A woman who has had prior NTD-affected pregnancy is at the highest risk for recurrence and should see a physician before planning another pregnancy. Her physicians will prescribe a higher dosage of folic acid (4 mg).

8) Also at risk are women who have maternal insulin-dependent diabetes; use anti-seizure medication; have diagnosed obesity; were exposed to high temperatures in early pregnancy (i.e., prolonged high fevers and hot-tub use); are white or Hispanic; and are poor.
9) Other potential health benefits of folic acid intake at 0.4 mg/day include reducing risks related to heart disease, stroke and some kinds of cancer.

10) Women should keep their folic acid intake to less than 1 mg per day, unless under the supervision of a physician. High doses of folic acid may complicate the diagnosis of vitamin B12 deficiency.

还有一个来自babycenter.com，尤其是最后一段。

How much folic acid you need
To reduce your baby's risk of having a neural tube defect, experts recommend taking 400 micrograms (mcg) of folic acid per day, beginning at least a month before you start trying to get pregnant.
In fact, because half of the pregnancies in the United States are unplanned, the CDC, the U.S. Public Health Service, the March of Dimes, the American College of Obstetricians and Gynecologists (ACOG), and other experts strongly recommend that all women of childbearing age get 400 mcg of folic acid every day. Some groups, such as the U.S. National Institutes of Health, suggest boosting your intake to at least 600 mcg daily once you're pregnant.
The neural tube – from which your baby's spine and brain will develop – begins to form about three weeks after conception, so it's critical to get a sufficient daily dose of folic acid before conception and during the first trimester of pregnancy.
Check the label of your multivitamin supplement to be sure you're getting enough. If you're not, you can switch brands or take folic acid separately. (Never double up on your multivitamins.)
If you're taking prescription prenatal vitamins, they probably contain 800 to 1,000 mcg of folic acid. Again, check the label.
Don't take more than 1,000 mcg per day of folic acid unless your healthcare provider advises you to. In the unlikely event that you have a vitamin B12 deficiency, too much folic acid can mask a condition called pernicious anemia.

小牛王

回复  小牛王

本地市场售卖的多数是5mg。要找0.4mg的，你可以在watson/guardian买Appeton:





...
藤原佐为 发表于 16-3-2011 12:09 AM

哦，我今晚就去Guardian找找看。因为复诊是下个月16日，那时才见到医生。还有一个月，不想在这一个月里吃过量。

谢谢。

利学零

嗯，我知道的是，过多的叶酸会随着我们的排泄离开身体。。。真的很多很多，就不能了，所以5mg应该还好吧？

倪安東

叶酸过多会怎样？

eelin_chin

可能外国人的体质好，跟我们亚洲人不一样，所以不用摄取太多吧？

ginnyoyl

据我所知,在备孕时,服用400MG的叶酸就够了. 我也是买了APPETON的..
但证实怀孕后,服用500MG的会比较好. 这是我从朋友那里听说的.

ginnyoyl

据我所知,在备孕时,服用400MG的叶酸就够了. 我也是买了APPETON的..
但证实怀孕后,服用500MG的会比较好. 这 ...
ginnyoyl 发表于 5-5-2011 10:58 PM

对不起, 是mcg不是mg.

eelin_chin

我吃1mg的那种，我还以为会不够呢。我老公还叫我每天吞多两片，但我认为药物不要吃太多比较好，所以只吃一片，幸好

whchin

叶酸过多会怎样？

angeljoanne

我买BlackmoresP牌叶酸的也是500mcg的，但现在我在吃Conceive well Gold （pre－conception），像综合维他命也有500mcg叶酸。
1. supplies nutrients for healthy ovulation
2. supports a healthy female reprodutive system
3. supports normal conception

自由得飞翔

请问一罐多少钱呢？

low

多数的叶酸在于4mcg/5mcg,怀孕最好吃到5的。。一天1粒。。。多于的回隋着身体的小便流失的。。斗牛士记得，一天吃的分量不能超过5mcg，无论是备孕还是怀孕了。。

angeljoanne

回复 16# 自由得飞翔

新币36.80 （offer假），暂时没看到大马有卖。