责怪科学之前，先弄清楚自己的问题出在哪里。
科学家证明omega-3 fatty acid 对健康有好处，并不等于说科学家告诉你应该天天吃omega-3药片。物极必反的道理，要强调的不是物有问题，而是度有问题。
文章要看是谁写的。不是所有“文章”上讲的东西都是科学。
要追踪科学，就要看是谁写的文章，发表在什么刊物上，还要看科学界同行们对这文章的反应是什么。
不愿意或没有能力追踪科学的话，就看看政府卫生部门的公众健康忠告。这比追踪科学新发展要容易得多，也基本代表了已经获得公认的科学研究结论。
关于omega-3，在加拿大政府卫生部就有对孕妇的相关忠告。这里并没有推荐公众天天去吃omega-3 药片，而是建议通过吃鱼来补充。
连政府网页也不愿意查的话，就问问家庭医生的意见，是不是大人小孩都需要天天吃omega-3药片？
http://www.hc-sc.gc.ca/fn-an/pubs/nutrition/omega3-eng.php
Omega-3 fatty acids in pregnancy
Women need more omega-3 fatty acids in pregnancy (IOM, 2002). Omega-3 fatty acids are transferred across the placenta and play an important role in the growth and development of the infant.
There are different types of omega-3 fatty acids in the diet. The omega-3 fat, alpha-linolenic acid (ALA) is found in some vegetable oils, nuts and seeds. These include canola oil, flax oil, walnut oil, walnuts and flax seeds. Our bodies can convert ALA into other omega-3 fats including docosahexaenoic acid (DHA). DHA and another omega-3 fatty acid, eicosapentaonoic acid (EPA) are found only in animal tissue lipids. The Institute of Medicine has established Dietary Reference IntakesFootnote5 values for ALA but not for EPA or DHA (IOM, 2002).
The best source of EPA and DHA is fatty fish; although DHA is found in other animal tissue lipids like eggs (see Table 1). DHA is an important omega-3 fatty acid in the brain. During pregnancy, DHA is transferred from the mother across the placenta and accumulates in the growing fetal brain and other tissues. After birth, DHA is transferred through breast milk. Dietary DHA contributes to the mother's DHA status, and pregnant and breastfeeding women with higher intakes of DHA transfer more DHA to their fetus, and supply more DHA in their breast milk (IOM, 2007).
Whether or not current diets provide sufficient ALA, or if ALA can be adequately converted to supply enough DHA during pregnancy and lactation, is uncertain (Plourde and Cunnane, 2007). While higher intakes of fish during pregnancy and breastfeeding have been linked to better infant and child development (see earlier section Fish contributes to a healthy pregnancy), there is no evidence that women who follow a healthy diet and eat no fish, such as lacto-ovo vegetarians, are at risk for pregnancy complications or poor child development.
Fish oil supplements and DHA enriched foods can provide important omega-3 fatty acids found in fish. However, there is insufficient evidence to draw any conclusion on the effects of fish oil supplements and DHA enriched foods on infant development (IOM, 2007). Additionally, the benefits of omega-3 fatty acids on complications of pregnancy (such as pre-eclampsia) remain uncertain, while research on omega-3 fatty acids and post-partum depression is incomplete (Makrides et al, 2006; Freeman, 2006; IOM, 2007; Freeman et al, 2008; Rees et al, 2008; Su et al, 2008).
