Is Breakfast the Most Important Meal of the Day?
A patient at the Battle Creek Sanitarium broke her dentures on a biscuit. The sanitarium’s director, Dr John Harvey
A patient at the Battle Creek Sanitarium broke her dentures on a biscuit. The sanitarium’s director, Dr John Harvey Kellogg, took this as a sign that he needed to invent something softer.
Kellogg was a strange man. He wore white suits exclusively. He kept a white cockatoo on his shoulder. Kellogg believed that bland food could suppress sexual urges, and he ran his sanitarium on this principle. Patients received vegetarian meals, colonic irrigations, and lectures on the dangers of masturbation. His guest list included presidents, Thomas Edison, Henry Ford, and Amelia Earhart.
The biscuit incident sent Kellogg and his brother Will into the sanitarium kitchen, where they accidentally left some boiled wheat sitting overnight. Rather than throw it out, they forced it through rollers and discovered it came out in flakes. They toasted the flakes. The flakes were edible. Corn worked even better.
This is how breakfast cereal was invented: by accident, in a religious sanitarium, by a man who thought food was medicine and pleasure was sin. The product was never meant to taste good. It was meant to be digestible and morally neutral.
Will Kellogg had different ideas. He wanted to add sugar. John Harvey refused. The brothers fought. Will bought the rights to the corn flake recipe, founded the Battle Creek Toasted Corn Flake Company in 1906, added sugar, and never spoke to his brother again.
The company Will built would define American breakfast for a century. Last year, an Italian candy maker bought it for spare parts.
Is Breakfast the Most Important Meal of the Day?
You have heard this phrase your entire life. It sounds like ancient wisdom, like something your grandmother’s grandmother believed. It is not. The origins are from a marketing slogan, coined in 1917 by a dietitian named Lenna Cooper, writing in Good Health magazine. Good Health was published by the Battle Creek Sanitarium. It was edited by John Harvey Kellogg.
Is breakfast the most important meal of the day? Only if you were selling cereal.
Before the 17th century, breakfast was considered morally suspect. Eating in the morning was seen as gluttonous. The Romans ate sporadically. Native Americans ate according to food supply and season. The idea that humans require three meals a day at fixed times is a cultural invention, not a biological requirement.
But the slogan worked. By the mid-20th century, cereal was a fixture of American life. The industry figured out how to make the product even more appealing: add more sugar, add cartoon mascots, and advertise directly to children.
Saturday Morning Was a Business Model
The golden age of cereal was the golden age of Saturday morning cartoons. The two industries grew together, feeding each other in a closed loop.
Cereal companies spent 90% of their advertising budgets on television. During Saturday morning programming, one in every three commercial minutes was a cereal advertisement. By the late 1970s, a Federal Trade Commission study found that 95% of food advertisements aimed at children promoted highly sugared products.
Then the FCC relaxed restrictions on advertising to children in 1984. The result was a new form of programming: cartoons that existed to sell toys and cereal. G.I. Joe, Transformers, He-Man, and Care Bears were not shows with merchandise. They were merchandise with shows. The cereal aisle followed. Smurf Berry Crunch. Mr. T Cereal. Ghostbusters Cereal.
The feedback loop was perfect. Cartoons sold cereal. Cereal funded cartoons. Children woke up early on Saturdays, poured themselves bowls of sugar, and watched advertisements for more sugar. Parents were grateful for the quiet.
Gen Z Discovered Eggs
The decline has accelerated. In the 52 weeks ending July 2021, Americans bought 2.5 billion boxes of cereal. By 2025, that number had fallen to 2.1 billion. A 13% drop in four years.
WK Kellogg’s first quarter of 2025 was brutal: sales down 6.2%, volume down 8.6%. The company lowered its full-year guidance. Post Holdings reported cereal volumes down 2.3%. General Mills saw volumes decline 2%.
The executives blame “normalisation” after the pandemic, when people stuck at home briefly returned to cereal. But the trend predates COVID. Cereal sales have been falling for 25 years.
The problem is generational. Younger consumers do not want cereal. They want protein.
According to the International Food Information Council, 59% of Americans wanted to increase their protein intake in 2022. By 2023, that number was 67%. By 2024, it was 71%. The protein obsession is reshaping breakfast entirely.
Cottage cheese sales jumped 17% in 2024, according to Instacart. Circana reports US cottage cheese demand up 20% in the past year. In Canada, demand rose 30%. The product that once symbolised diet culture and deprivation has become a TikTok sensation, praised for delivering 14 grams of protein per half cup.
Eggs remain the most popular breakfast food, eaten by 46% of consumers on a typical morning. Toast and bagels follow at 33%. Cereal has fallen to 26%, behind eggs, toast, and fruit.
When surveyed, 71% of Gen Z breakfast eaters say they seek protein-rich meals. Greek yogurt, cottage cheese, overnight oats, and eggs have displaced Froot Loops.
Nobody Wants to Sit Down Anymore
The structural problem is deeper than protein. People are abandoning breakfast as a meal.
According to Mintel’s 2025 research, 63% of breakfast eaters aged 18 to 34 prefer snacking in the morning rather than eating a full breakfast. They are not choosing different breakfast products. They are opting out of the concept of breakfast altogether.
Intermittent fasting has gone mainstream. The most popular version, 16:8, involves skipping breakfast entirely. According to the IFIC survey, intermittent fasting rose from 12% popularity in 2023 to 13% in 2024, making it one of the most followed dietary patterns in America.
The lifestyle has changed too. A bowl of cereal requires a bowl, a spoon, milk, a table, and time. A protein bar requires a pocket.
The Milk Problem
Cereal needs milk. Milk consumption is collapsing.
The average American drank 0.78 cups of fluid milk per day in 1990. By 2019, it was 0.49 cups. A 37% decline in three decades. US milk production declined in both 2023 and 2024, the first back-to-back decline since the 1960s.
The Price of Sugar
Cereal got expensive. Between 2019 and 2024, input costs for food manufacturers rose 32%. Cereal prices increased accordingly. Private label alternatives held their prices longer, then raised them by 12%.
The result was predictable. Private label cereal sales grew 6% in a single year. General Mills, Kellogg, and Post all saw unit volumes decline. Consumers switched to store brands, which taste similar enough and cost considerably less.
The value perception of branded cereal has eroded. When a box of Frosted Flakes costs the same as a carton of eggs, and eggs have 6 grams of protein per serving while Frosted Flakes have 1 gram, the choice becomes obvious.
The Colour Problem
The cereal industry also faces a regulatory crisis.
In April 2025, Health and Human Services Secretary Robert F. Kennedy Jr. announced that the FDA would phase out petroleum-based synthetic food dyes. The announcement followed years of pressure from activists, state-level bans in California and Texas, and growing consumer awareness that Froot Loops sold in Canada uses natural dyes while Froot Loops sold in America uses artificial ones.
WK Kellogg committed to phasing out artificial colours from all retail products by the end of 2027. The company will halt any new products containing synthetic dyes starting in January 2026.
The reformulation is expensive and risky. General Mills removed artificial dyes from Trix cereal in 2016, switching to natural sources like turmeric and radishes. The cereal lost its neon colours. Consumers revolted. The company switched back in 2017.
Making cereal look like cereal without petroleum-based dyes is harder than it sounds. Natural alternatives are more expensive, less stable, and produce muted hues. The industry faces a choice between losing the visual appeal that sells to children and defending ingredients that regulators and parents increasingly view as harmful.
The Death of an American Company
The Kellogg Company split in two in 2023. The snacks business, including Pringles, Cheez-Its, and Pop-Tarts, became Kellanova. The North American cereal business became WK Kellogg.
In August 2024, Mars announced it would acquire Kellanova for $35.9 billion. The snacks were valuable.
In July 2025, Ferrero announced it would acquire WK Kellogg for $3.1 billion. The cereal was not.
On September 26, 2025, the acquisition closed. WK Kellogg ceased trading on the New York Stock Exchange. The company that invented American breakfast cereal, that coined the phrase “breakfast is the most important meal of the day,” that turned Saturday mornings into a commercial ecosystem, is now a wholly owned subsidiary of an Italian candy company.
The headquarters will remain in Battle Creek, Michigan. Tony the Tiger will remain on the box. But the Kellogg brothers’ company, born from a sanitarium kitchen and a broken denture, no longer exists as an independent entity.
The cereal industry did not die because people stopped liking cereal. It died because everything that made cereal dominant has reversed.
The slogan was marketing, not science. Intermittent fasting disproved it. The Saturday morning ritual dissolved when cartoons became available on demand. The convenience advantage disappeared when grab-and-go protein options proliferated. The price advantage disappeared when input costs rose 32%. The health halo disappeared when consumers learned to read nutrition labels.
What remains is nostalgia. Adults who grew up with cereal still buy it occasionally, for themselves or their children. But they buy less of it, less often, and increasingly from store brands.
The product was never essential. It was just marketed that way, brilliantly, for a hundred years. Now the marketing has stopped working.
Sources:
History.com: Dr. John Kellogg Invented Cereal
Food Manufacturing: Cereal Sales Declined for Decades Before Kellogg Sale
Cheese Reporter: The Protein Trend in 2025
Fortune: RFK Jr. Gives Food Companies Ultimatum on Artificial Dyes
