Analogous to the fact that it is very hard to study the nutrition and long-term effects of Soylent on a big scale, with a diverse set of people, the same seems

Analogous to the fact that it is very hard to study the nutrition and long-term effects of Soylent on a big scale, with a diverse set of people, the same seems to be true for "normal" food. How do you even _define_ a "regular diet"? The exact diet varies from person to person, even from week to week! Even though we've had "normal diets" for way longer, it is impossible to study those effectively without first closely defining the diet in question (which is effectively the same as feeding Soylent, minus the powderization and conservation). Following that, it should be much easier to closely examine the effects of Soylent on people than it is to study any other non-standardized form of nutrition. And yet every "fact" about Soylent you read is purely anectodal.