Dunno. Read "Toxic Oil" [p63, & p60 for why they are necessary] and you may find out. Or ask him via the web site.

My understanding is that none of the capsules are effective for a variety of reasons. And the same applies to a lot of the bottled oils. The general idea is to reverse the ratio of Omega-6/Omega-3 so that the latter predominates by about 2:1. I think that Australians currently run about 20:1 in the wrong direction The best way of doing that, apart from dietary control, is to supplement with cold-pressed  linseed oil, also known as flaxseed oil.

It's generally available in chemists and vitamin stores and cost about $25 to $40 for 500ml.

JohnN