The problem with that is that fortification is already rampant in premade foods, and so most first-worlders are already eating these refined ingredients in ever

The problem with that is that fortification is already rampant in premade foods, and so most first-worlders are already eating these refined ingredients in every meal. Moreover, many people take one-a-day multivitamins which in a single dose, contain the same amount (and sometimes more) of the same refined ingredients in a day's worth of soylent. Extensive studies have been done on the safety and efficacy of multivitamins, and while their utility for healthy people with balanced diets is a matter of debate, their safety (when taken at the recommended dose) is well established.