Hilary Smith, University of Denver

Lactose intolerance makes drinking milk or eating ice cream a literal pain. For some people, eating a dairy treat can lead to bloating, nausea and diarrhea. You might’ve experienced its effects yourself. If so, you may think of lactose intolerance as a defect rather than the norm.

But did you know that most people in the world today are lactose intolerant – and that the condition itself was invented in the 1960s?

“Surely you mean discovered, not invented,” I hear you saying. I don’t. As a historian who has traced the origins of nutrition-science ideas, I have chosen the word “invented” on purpose.

Inventing lactose intolerance

Variations in people’s ability to digest lactose first came to scientists’ attention after American dairy producers found a way to rid themselves of a postwar milk surplus. To offload what they couldn’t sell, they looked to the government to intervene. And it did, buying the excess and embedding it in school lunches and other places with publicly funded meals.

Suddenly, many people who had not habitually drunk milk were consuming it regularly, including not only some Americans but also people overseas. Part of that same milk surplus found its way into school lunches in places such as Japan and Taiwan in the 1950s as the American government began to sell milk to allies during the Cold War.

Many of the groups drinking milk regularly for the first time did not like it. In fact, it made them feel sick. Intrigued, scientists set up experiments to figure out why. In a 1966 study comparing how Black and white people incarcerated in Baltimore metabolized lactose, researchers found that Black participants had lower levels of lactase – the enzyme that breaks down lactose – in their guts.

To the white scientists conducting this study, the trouble that the Black prisoners had digesting milk looked like an “inborn error of metabolism.” They assumed that the normal human state was lactose tolerance and that the lactose intolerant had inherited a genetic mutation.

It was only after years more work with research participants of many races that experts realized that, as one National Institutes of Health official put it in 1981, “lactose intolerance is a normal physiological condition, shared by every adult animal except for certain ethnic and racial groups in man.” People of northern European descent, it turned out, were the weird ones. It was their ancestors who had passed down a genetic mutation – one that made them able to digest milk after infancy.

In short, what scientists discovered in the 1960s was that different bodies process milk differently. What they invented was the idea that lactose intolerance is a defect. Accepting that framing would mean nearly two-thirds of the human population – the estimated prevalence of lactose intolerance worldwide – is defective.

Instead of acknowledging that dairy-free diets can be healthy, people innovated ways to overcome this supposed disability so everyone could consume more.

Nutritional imperialism

Lactose intolerance is one example of what I call nutritional imperialism: a way of thinking that treats white diets as the norm and everyone else’s as an aberration.

Nutritional imperialism was common in the 20th century, when scientists thought that not only milk-rich but also meat-heavy diets were best; they considered diets outside of the United States and Europe too vegetarian. Some also argued that wheat flour, not rice, ought to be the universal staple.

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The same bias applied to bodies. Besides faulty lactose digestion, nonwhite bodies were accused of other failures, too, such as aldehyde dehydrogenase deficiency, an inability to digest alcohol quickly. The less technical term for this may be more familiar: Asian flush.

Such differences might have been thought of as variety, just another way of being human. Instead, each became a deficiency.

Many people today have inherited and perpetuated this way of thinking without knowing it, including those who are deemed deficient by it. In 1959, the director of Japan’s nutrition bureau declared that “rice-eating peoples” such as the Japanese were “resigned and passive” and could correct this by imitating Western diets and switching to wheat.

Today, the most prominent scientist promoting the idea that Asian flush is a disease is a geneticist of Taiwanese descent who started a research consortium to study “the most common human enzymopathy in the world.”

The Chinese Nutrition Society placed a tall glass of milk next to its 2022 Food Guide Plate – never mind estimates that the vast majority of Han Chinese, the largest ethnic group in China and worldwide, are lactose intolerant.

Turning sickness back into difference

Science that pathologizes difference helps racism persist.

In recent years, white supremacists have embraced the concept of lactose intolerance as a distinguishing debility of nonwhite people. Social media users have copied and pasted a map of the geographic distribution of lactose tolerance originally published in the scientific journal Nature into racist chat threads on the online discussion forum 4chan.

In 2017, internet trolls disrupted an anti-racist art installation with neo-Nazi chants and messily downed jugs of milk to accentuate their white identity.

Turning a lactose-digestion difference into a deficiency has done more to reinforce narratives of racial hierarchy than to improve public health. So here’s a suggestion: If you enjoy eating dairy, keep doing it; if you don’t, don’t – and know that there is nothing wrong with you.

Hilary Smith, Professor of History, University of Denver

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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New partnerships in Fresno and Kansas join ongoing operations in Omaha, St. Louis, Santa Barbara and Los Angeles

As millions of students return to classrooms, transportation company Zūm is beginning the 2026–27 school year with new district partnerships, expanded technology deployments and thousands of drivers preparing for what the company calls “the most important commute in America.”

The Redwood City, California-based student mobility company announced that its teams have completed months of driver training, route validation and operational planning ahead of the new academic year.

“There is nothing quite like the first day of school at Zum,” founder and CEO Ritu Narayan said in the company’s announcement. “You see drivers arriving before sunrise, teams making final preparations and buses rolling out of yards across the country—all united around one purpose: getting students safely and reliably to school.”

New buses roll out in Fresno

One of Zūm’s largest new launches is in California’s Fresno Unified School District. According to the company, 168 buses were placed into service just two weeks after its local team moved into a new transportation yard.

The district is also introducing the Zūm Parent App, which allows families to track buses in real time, receive arrival alerts, view scheduled rides and receive notifications when a child boards or exits a bus. Registered students will receive bus cards connected to the transportation system, according to Fresno Unified.

The rollout is part of a broader change in how Fresno Unified manages student transportation. Routes and stops will continue to be evaluated using registration information, actual ridership and family feedback, the district says. Beginning September 28, registered students will generally be required to show a bus pass before boarding. Fresno Unified’s transportation page provides registration instructions and assistance for families.

Technology comes to LAUSD’s in-house fleet

In Los Angeles, Zūm says its CMX technology has been deployed across the Los Angeles Unified School District’s internally operated bus fleet.

The platform is designed to connect routing, dispatch, drivers, schools, transportation officials and families through one operating system. Its tools include real-time vehicle visibility, route planning, operational coordination and family communications.

Rather than replacing the district’s in-house drivers, the Los Angeles deployment focuses on providing the technology used to coordinate district-operated buses.

New partnership in Kansas

Zūm also began a new partnership with the Shawnee Mission School District in Kansas. District leaders, drivers, monitors and school employees marked the start of the program with a launch celebration.

The company said Shawnee Mission’s transition is intended to give the district a more modern and technology-supported approach to student transportation.

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Meanwhile, Zūm is returning for a third school year in Omaha and Santa Barbara. Its St. Louis operation is entering its second year.

Drivers remain at the center

Although technology plays a growing role in school transportation, Zūm emphasized that drivers remain essential to the daily experience of students and their families.

“Back to school is when months of preparation come to life,” said Liz Sanchez, Zūm’s executive vice president of student mobility. “Our teams spend months hiring and training drivers, validating routes and working alongside our district partners to prepare.”

Drivers often serve as the first school-related adults students see in the morning and the last they see before returning home. Their work can also determine whether students arrive safely and on time—especially in communities where families have limited transportation choices.

A changing school-bus experience

School transportation has traditionally depended on separate systems for scheduling, dispatching, vehicle tracking and communicating with parents. Zūm CMX is designed to bring those functions together and give school districts a clearer view of their daily operations.

For families, the most visible change may be access to real-time bus locations and arrival notifications. These tools can reduce some of the uncertainty associated with late buses, route changes and missed pickups.

Zūm reports that its technology and transportation services now support more than 6,500 schools across 19 states. As the company expands, the 2026–27 school year will test how effectively its technology, drivers and district partnerships can translate into dependable daily service.

For students, however, the goal remains straightforward: a safe ride to school, a reliable trip home and one less obstacle between them and their education.

This article is based primarily on information provided in an August 21, 2026, Zūm press release. Statements about the company’s national reach, fleet deployments and technology are attributed to Zūm unless independently noted.

Source: Zūm official website

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Related links:

• Fresno Unified: Zūm Parent App
• Fresno Unified: New Transportation Model
• Fresno Unified: Bus Routes
• Fresno Unified: Back-to-School Resources

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Millions of mobile gamers prize stress relief over winning

(Sheeka Sanahori) In the school’s car pickup line, five minutes before it starts moving. In the doctor’s office waiting room for an appointment that you’ve been heavily anticipating. In bed, just before going to sleep. In these transitional moments, many people reach for their phones — not to scroll, but to play.

According to a June 2026 survey of more than 128,000 KashKick mobile gamers, playing a mobile game is more than a way to pass the time. Stress relief and relaxation are the top reasons respondents play, beating out entertainment and fun. As KashKick reports, for many people, this means mobile games are less a simple distraction and more a coping mechanism for the daily stress of life.

A quick reset for life’s transitional moments

Most respondents identify as women, and 60% live in households that earn less than $50,000 per year. In the ranking of their reasons for playing, stress relief and relaxation topped the list, with boredom relief, entertainment and fun close behind.

The ranking reads less like a profile of a gaming hobby and more like a profile of a coping behavior.

More than half of the respondents play games daily or multiple times a day. When they reach for a mobile game, about 53% of the time it’s for a short session—usually 30 minutes or less. Where and when people play tells its own story: 58% play in bed before going to sleep and 40% play in the bathroom. These are private, solitary moments, not the times people typically plan entertainment into their day.

Coping with stress by gaming

To understand why respondents play games for stress relief more than for fun, it helps to look at who they are. Among those surveyed, 19% say they’re unemployed or looking for work, and 60% live in lower-income households. There are likely some areas of their life where they must make every dollar stretch to cover the things they need.

The survey findings coincide with research from the American Psychological Association’s 2025 Stress in America report. According to the report, 18% of men and 22% of women under age 65 rate their stress level at eight or higher on a scale of one to 10. Although the KashKick survey didn’t measure stress, respondents are mostly women and fall within the age and income groups the APA found to carry the most stress.

The APA’s report also describes loneliness as a major strain for Americans. The KashKick survey didn’t measure feelings of isolation, but 55% prefer to play alone, and 60% rarely or never discuss their gameplay with friends or family.

Overall, the survey identifies a group of people who have found a routine, low-cost approach to cope with stress. They’re not necessarily there to get the highest score. They’re playing a mobile game to help them navigate a day that, with all of life’s to-dos and challenges, could quickly feel overwhelming.

Methodology

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The KashKick Gaming Habits Survey was fielded from June 8, 2026, through Aug. 10, 2026, among KashKick members in the United States who play mobile games. The Gaming Habits Survey was available to all members on KashKick’s Surveys page post-profile completion. The survey received 128,218 total responses, with question-level response counts ranging from approximately 109,793 to 128,218 depending on attrition. All findings describe KashKick mobile gamers and should not be interpreted as representative of U.S. mobile gamers overall. Industry and stress context references publicly available data from the American Psychological Association, Statista, and Newzoo.

Photo courtesy of Shutterstock

SOURCE:
KashKick

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