it hurts to read, but how about the ethical if you care… AND the poor-human way? flaxseeds and chia are cheap for what they provide! and dirt cheap if you have time & possibility to buy directly from a farmer
My understanding is that the Omega-3 from these is not particularly bio-avaiable compared to fish/krill oil.
and having only ALA and not EPA/DHA as source of omega-3 will slowly lead to your body be more efficient at transforming (ALA to EPA/DHA)
https://academic.oup.com/ajcn/article/100/suppl_1/449S/45766...
and there is plenty of educative websites searching for “vegan” and omega-3 sources…
edit: ops my bad! thought i could reach one of the studies that conclude this by Googling but nope, i linked the wrong one :D here is your dose of research, https://academic.oup.com/ajcn/article/92/5/1040/4597496