I work with an Irish lady, and as someone who is deficient in virtually every mineral & vitamin on the planet I'm always suffering in some way or another!
Anyway, she told me about dulse - it's seaweed found in Irish & Canadian coastlines. She told me how people in Ireland just eat is as it is. She said it's sooooo good for you. I was skeptical because, well, it's seaweed! But after Googling, I found it is the only natural substance in the world which can provide a human with 100% of everything they need as far as vitamins/minerals go!
It's not cheap, you have to buy it online & get it posted. And it's an acquired taste/texture (very salty & no matter how much you chew it, it seems to make no difference!) but I'm persevering with it & I'm hoping next time I have bloods done, my doctors will say there's been improvement in my malnourished areas!