I believe Gustav was referring to the point that worldwide, 0.6% of humans require a significantly reduced iron intake, with certain nationalities such as Scandinavians having significantly higher incidences. If 1 in every 100 people in an entire country need a reduced iron intake, Soylent would certainly not be an option for a reasonable chunk of customers, and that incident rate is higher than many allergies that Soylent already caters for - for instance, Coeliac (gluten intolerance) is roughly 1 in 200.
I believe the plan in future is to supply tailored versions, with adjustable calories separate to vitamin intake and the ability to reduce or eliminate certain vitamins or minerals for those with HHC and similar issues.
For now, I can tell you fairly certainly that no, you will not see any other complete versions of Soylent than the straight one-size-fits-all packet for the next year at least, especially since the entire vitamin/mineral blend undergoes an encapsulation process at the source and reaches the co-packer as a single indivisible powder before being blended with the other ingredients. Changing or removing the iron content would mean sourcing a completely new blend of the entire vitamin/mineral content, and since they’re still only trying to scale up production of a single product with only one source for nearly all the ingredients (which took quite a while to organise), that’s seriously unlikely to happen anytime soon.
But there’s hope, they are definitely working on plans to sell different blends for different diets - it just might be a while.
If we’re really lucky, they may start selling a DIY base - containing only the bulk such as the rice protein, oat flour and maltodextrin, leaving out ingredients that are incompatible with the largest number of various diets that Soylent doesn’t already cater for. That’d be fairly easy since it’d just be a case of an extra production line, omitting whatever ingredient/s and using different packaging - no need to source any new ingredients (which is the longest lead time). We could well see something like that in less than a year. In that case, it’d be something like Soylent official with no vitamin/mineral blend at all. Then it’d be up to you to source your own alternatives to the missing parts, such as a multi-vitamin pill with reduced iron if that’s the only thing missing, and you’re good to go. Far less hassle than trying to organise, source and measure a large number of various powders for your own DIY soylent completely from scratch, which would invariably be inferior to official Soylent. But they haven’t made any hints at such a possibility.
Either way you slice it, by the time Soylent is available in Europe, there will have been announcements as to what products/new blends they’ve been working on and when they will be ready for sale - Soylent without Vitamin/Mineral blend could well be produced alongside regular Soylent when European co-packers open from the very beginning, in which case you’ll be waiting no longer than the rest of us non-yanks. Still, would be nice to have some more details on what they’re working on now, though… Don’t really see how it could possibly hurt them letting us know week by week what different blends are in beta and how they are different and what they hope to do with them. Would certainly give us something to read and an impression of progress.