Docosahexaenoic Acid (DHA) To Prevent Development of Cognitive Dysfunction Due to Chemotherapy

Chemotherapy is often associated with problems of cognitive functioning such as decision making, learning, and memory. These symptoms, collectively referred to here as cognitive dysfunction can appear as early as the first few months after starting chemotherapy and may persist long after chemotherapy and anti-hormone therapy, if any, is completed. Once developed there is no satisfactory treatment for cognitive dysfunction although cognitive retraining and exercise may improve symptoms and/or function; at least for some. Omega-3 fatty acids derived from ocean fish are a new potential preventative treatment against development of cognitive problems which can arise in some individuals during chemotherapy treatment. In doses of 1-2 grams per day it has been found to improve some aspects of cognitive function in healthy adults who have low DHA dietary intake. It has also been shown to improve some aspects of function in individuals with a mild reduction in cognitive ability but not for those with marked impairment. Participation in this study will last about 12 months. Participants will make visits to the study site for both standard of care visits and additional study-related visits. Participants will be randomized (randomly assigned; like flipping a coin) to one of two groups. Neither the Investigator nor the participant will know the assigned treatment.