Hello. A few days ago there was a short thread on /g/ pertaining to Solar Foods product solein. While that linked article was godawful and said nothing, i got interested in claims made by the company. This article https://biofortified.org/2019/08/food-without-photosynthesis/ does a good job at providing an overview of biomass production without photosynthesis and in my head it all checks out, but all news articles and Solar Foods site (and blog) did not answer one question - since solein is 50% protein and they keep claiming that only required resources for production are water, carbon dioxide, and electrical power, what are the sources of sulfur and nitrogen, both obviously required elements in protein production. No available source speaks of fixing atmospheric nitrogen or any other source of it at all and same goes for sulphur. Should i just treat Solar Foods as a scam? They are not the first company to work with carbon fixing without photosynthesis and the process is clearly possible, does that just mean they are trying to exaggerate possibilities, and downplay secondary requirements to the point of hiding this fairly evident fact of protein's chemical composition?