Protein, Grown from Air

> Not plant. Not animal. A category of its own.

So Bacteria or Fungus. I read the whole site, but I couldn't find any technical detail.

> drawing energy from hydrogen

Archaea? They have weird energy sources.

> Rich in fiber

Now I'm confused. Isn't fibber mostly cellulose from plants?

> All nine essential amino acids.

Does it fixate Nitrogen? It's one of the hardest steps, specially in a not soil, no fertilizer environment.

> Solein contains naturally occurring iron.

I'm not sure how that could be possible.