I don't take DHA at all. I am deathly allergic to seafood, and 'vegan' is seaweed, and I had a reaction to that too. my children are healthy. I try to eat a good balanced diet.
If you are eating foods with DHA then that's even better than the supplement. I don't take a DHA supplement because I take cod liver oil which has a natural DHA in it. No worries
Re: no DHA?
my children are healthy. I try to eat a good balanced diet.