Welcome to the world of forum posting!
I hadn't heard anything about Omega 3 being good for PD, but I've just Googled it and there doesn't seem to be anything conclusive - just the usual "MAY be beneficial....." etc. It seems to be really just part of what they're always telling us about how important it is to eat a "nutritionally balanced diet", which apparently is important for everyone, PD or not.
So.....it doesn't look as though Omega 3 supplements are going to be the answer to all our prayers, unfortunately!
Having said that, I suppose there's no harm in giving them a try.....