I take 90% EPA fish oil capsules from a company called Mind1st for depression.  I have always taken fish oil capsules bought from places like Holland and Barratt but hadn't realised how little the EPA and DHA was in terms of percentage.  Mind1st say that taking DHA with EPA can inhibit the effects of EPA and at this dose is not needed as EPA is a precursor for the body to produce enough DHA. I have been taking these capsules for 3 months and have been able to slowly reduce my antidepressants. 

Can someone please tell me who is right about EPA and taking it with or without DHA?  It is all rather confusing.  My father died at 51 of a heart attack although my mother is still going strong at 97 and I have read that you need DHA particularly to avoid heart problems which I am not taking but the EPA seems to be working for depression.  Thank you.