Early studies suggest that fish oil may decrease the risk of recurrent miscarriages in women with antiphospholipid syndrome (APS). Also, omega-3 fatty acids, especially DHA, may improve brain and eye development when taken during pregnancy and breastfeeding or when included in infant formula. However, keep in mind that some fish (and, therefore, some omega-3 fatty acid supplements) may contain heavy metals and other toxins that are especially dangerous for pregnant women. Do not take an omega-3 fatty acid supplement during pregnancy without checking with your healthcare provider, who can direct you to a supplement that is safe for pregnant women (see Pregnancy and Omega-3).

 

Early evidence suggests that omega-3 fatty acids may help children with attention deficit hyperactivity disorder (ADHD) or other developmental problems, although you should not give a child an omega-3 supplement without the approval of the child's healthcare provider.

 

Studies with mice and rats have sometimes shown that omega-3 fatty acids may have a role in weight loss and fat loss, but human studies in this area are lacking. It is too early to tell if taking omega-3 could help people lose weight. Keep in mind that omega-3 fatty acid supplements are not free of calories or fat.

 

Researchers have noticed that diets high in omega-6 fatty acids but low in omega-3 fatty acids, such as the typical American diet, may increase the risk of depression or other mental health problems. Early studies suggest that taking fish oil may help antidepressants work better and that fish oil may improve depression associated with bipolar disorder.