From Metrecal in 1959 to Soylent in 2013, the meal replacement industry has spent six decades solving a problem most humans did not have. The promise stays identical. The food does not improve.
Somewhere in America right now, a person is drinking their lunch out of a bottle and calling it optimization. This is not new behavior. In 1959, the Mead Johnson company introduced Metrecal, a powdered meal replacement marketed to postwar Americans who wanted effortless weight loss and, presumably, fewer decisions before noon. The product sold enormously well. People hated eating it almost immediately. Sixty-four years later, a Los Angeles company called Soylent launched a meal replacement powder with the explicit goal of making food irrelevant, and it recalled its snack bar in 2016 after users reported significant gastrointestinal distress. The details change. The category persists. What we are dealing with here is not a product so much as a recurring human idea — that eating, one of the more pleasant things available to us, is fundamentally a logistics problem in need of a solution.
The Origin Story Nobody Asked For
Metrecal arrived in 1959 as one of the first mass-market adult meal replacements, packaged in a can and designed to replace meals for people pursuing weight loss. It worked, in the narrow sense that consuming fewer calories tends to produce weight loss, and it failed in the broader sense that it tasted like sweetened wallpaper paste and required its users to not eat food. The product became a cultural phenomenon anyway. There were Metrecal cookbooks, Metrecal lunch clubs, and a brief national conversation about whether Americans could simply agree to stop chewing.
What Metrecal established — and what every product in the category since has inherited — is the two-track pitch. Track one was medical: meal replacements have a legitimate clinical application for people who cannot eat normally, including patients recovering from surgery or managing certain metabolic conditions. Track two was aspirational: meal replacements could also work for anyone who found food inconvenient, which turned out to be a significantly larger marketing demographic. The industry has been running both tracks simultaneously ever since, and the tension between them is where most of the confusion lives.
What the Research Actually Says, Which Is More Complicated Than the Label
The peer-reviewed literature on meal replacements is genuinely mixed in a way that suggests everyone involved is trying their best. A systematic review and meta-analysis published in obesity research literature found that structured meal replacement programs produced greater short-to-medium-term weight loss than conventional reduced-calorie diets. A separate meta-analysis on weight-loss adherence found that meal replacements could improve outcomes compared to self-selected diets, with the important qualifier that benefits were strongest when the products were used inside structured clinical programs — not when someone bought a case of Soylent Original and started skipping dinner.
The distinction matters. A randomized controlled trial examining meal replacement use in overweight and obese adults found improvements in cardiometabolic markers alongside weight loss, which is a genuinely useful finding. What none of these trials establish is that a nutritionally formulated powder delivering a calculated calorie target is equivalent, over the long term, to eating a varied diet of whole foods. Being mathematically complete is not the same as being actually sufficient. Whole food provides dietary fiber diversity, phytonutrients, and food-matrix effects that are not captured on a nutrition label, and the microbiome research on processed liquid diets remains, to put it charitably, underdeveloped.
Soylent and the Spreadsheet That Wanted to Be Lunch
When Soylent launched in 2013, its founder Rob Rhinehart published a blog post describing his experiment living exclusively on his homemade nutritional formula for thirty days. The post went viral among people in the technology industry, which should perhaps have been a warning sign. The premise was that food is inefficient and that a correctly engineered liquid could replace it without meaningful loss. The company raised significant funding and began selling a powder-based meal replacement that its makers described as containing all the nutrients needed for a healthy lifestyle.
In 2016, Soylent issued a disposal recommendation for its Soylent Bars after consumers reported nausea, vomiting, and gastrointestinal illness following consumption. The company attributed the problem to an algal flour ingredient and reformulated accordingly. This is a reasonable corporate response to a product safety issue. It is also, as a narrative beat, almost too on the nose. The meal replacement designed to make food obsolete made people sick in a way that actual food, prepared with normal human care and regional agricultural tradition, tends not to. A 2009 Barolo from Giacomo Conterno, paired with a wedge of Parmigiano-Reggiano aged twenty-four months, has never once required a recall. This is worth noting.
The meal replacement industry is not going away, and in its proper clinical context it does not need to. For people managing obesity under medical supervision, or for patients who cannot eat solid food, these products serve a real function. The problem is the parallel pitch — the one that tells healthy adults that eating is a waste of time and that the body is a productivity application that simply needs the right inputs. The body is not a productivity application. It is an organism with approximately ten thousand years of evolved preferences around flavor, texture, social eating, and the particular satisfaction of a meal that required someone to actually cook something. You can replace all of that with a beige shake. Some people do, every day. They are, by all accounts, fine. They are also, by their own accounts, a little sad about lunch.
* This article contains opinions, satire, and possibly correct information about wine and cheese. It is not medical advice.
