This popular video (13,000 views) suggests that Omega-3s are essential for heart and brain health. The suggested reason for the importance of Omega-3s is that it improves electrical signaling in the heart and brain. The presenter, Bruce Yaffe, MD, suggests that people over the age of 40, people no longer have the enzyme that allows conversion of ALA (the parent Omega-3) to EPA and DHA. As a result, he says that fish and fish oil are the best sources of Omega-3s for those over the age of 40. His recommendation is a gram of fish oil per day.