- Docosahexaenoic acid (DHA) is an omega-3 fatty acid found in salmon, tuna, and other types of fish. It is in the same family as other omega-3 fatty acids found in plant foods like flax, soy, and walnuts. In the human body, the highest levels of DHA are found in the brain, eyes, and sperm.
- DHA has been studied for preventing heart attack risk factors such as high cholesterol. However, some research found that DHA may increase levels of "bad" cholesterol.
- DHA has also been studied for improving brain and eye function, infant development, health during pregnancy, and mental disorders. Low levels of DHA have been linked to a higher risk of some conditions such as attention-deficit hyperactivity disorder (ADHD), Alzheimer's disease, and depression. However, more research is needed.
- DHA is now added to infant formula in many countries. It is believed to have health and development benefits.