Hi Merri Ellen,
I found a site helpguide.org teaches you how to eat healthy. They suggest primrose oil for depression and moodswings. Have you heard of this?
ANSWER:
I'm afraid, there's not enough evidence on primrose oil. For more info, visit the National Center for Complementary and Alternative Medicine:
NCCAP on Primrose Oil...
For now, it's safe to go with the mounds of research on Omega 3 fish oil
The research of Dr. Andrew Stoll reveals the benefit of Omega 3 fish oil for the depressed.
The Benefit of Omega 3 Fish Oil for Your Mind