Very true, Bret. You need to be sure that the supplements you are taking are from algae and don't contain any gelatin or other animal products.

Quite right, Bret. That's why today, I'm going to Walgreens, and pick up some algae-derived DHA. I read somewhere that if everyone wanted to take fish oil, there wouldn't be enough fish to fill the need. And, I never did like to kill fish. Didn't like to thread a worm on a hook either. And, some fish oil might contain PCBs, dioxin, mercury, and who knows what else. I'll be happy to get that algae-derived DHA. I love dreaming in color. Obviously DHA has a great impact on my brain.

Well, back to what I read quite a while ago. It seems we're all different in our ability to convert ALA to DHA. Here are the studies:

http://dhaomega3.org/index.php?category=overview&title=Conversion-of-ALA-to-DHA

Taking one of the algae-derived capsules per day, is equivalent to eating a can of sardines every three days. That would be 300 mcg/day of DHA. I think that's good enough.