为什么医生不建议孕期服用DHA？ 在孕期，补充DHA成为许多准妈妈们的共识。然而， recent studies have raised concerns about the safety and effectiveness of DHA supplements during pregnancy. Here are some reasons why doctors do not recommend taking DHA during pregnancy. 1. safety concerns DHA supplements are commonly recommended to expectant and new mothers due to their potential benefits for brain and eye development. However, some studies have suggested that high levels of DHA intake during pregnancy may increase the risk of certain health issues, including: * birth defects, such as cleft palate and Down syndrome * miscarriage * preterm delivery * low birth weight * and certain cancers, such as breast cancer One of the concerns surrounding DHA supplements during pregnancy is that they may contribute to the risk of birth defects. For example, a study conducted by the National Institute of Environmental Health found that high levels of DHA supplementation during pregnancy may increase the risk of birth defects, such as cleft palate and Down syndrome. Additionally, some studies have suggested that high levels of DHA may increase the risk of certain cancers, such as breast cancer. For instance, a study published in the journal CancerCancerDaData found that high levels of DHA supplements during pregnancy may increase the risk of breast cancer in women, particularly those who are of Ashkenazi Jewish or other ethnicities. 2. conflicting results While some studies have suggested that DHA supplements are safe during pregnancy, other studies have raised concerns about their safety and effectiveness. For example, a review of 29 studies on the safety of DHA supplements during pregnancy found that only four studies reported any adverse effects, while the remaining 25 studies found no evidence of harm. 3. potential side effects DHA supplements may cause a range of potential side effects during pregnancy. For example, some women may experience nausea, vomiting, or diarrhea after taking high doses of DHA supplements. Additionally, DHA supplements may cause an upset stomach, especially if taken on an empty stomach or with a full meal. 4. unnecessary expense DHA supplements can be quite expensive, and some women may feel that they are not necessary or cannot afford the additional expense. However, it is important to note that the evidence on the safety and effectiveness of DHA supplements during pregnancy is still emerging, and more studies are needed to fully understand their potential risks and benefits. In conclusion, while some studies have suggested that DHA supplements are safe during pregnancy, others have raised concerns about their potential risks. As with any supplement, it is important to talk to your doctor before taking DHA during pregnancy, especially if you have a medical condition or are taking other medications. Remember, the safety and effectiveness of DHA supplements during pregnancy are still being studied, and more research is needed to fully understand their potential risks and benefits.