Let me paint a picture for you. Suppose you find yourself in a situation where a sudden outbreak of illness strikes among the students at your university, the very people you attend classes and socialize with, just as they’re loading up their plates with their favorite late-night burgers and pizzas.

I have come to learn, more than ever, just how detrimental junk food is to university students. A significant number of students at the university I attend are currently struggling with a variety of serious health conditions, and for most, the cause is rather apparent: their indulgence in junk foods such as burgers and pizzas on a daily basis. Was it simply a coincidence that they all came down with an illness at the very height of their junk food consumption?

The library lights are still on at 2 a.m., the screens are still glowing, the deadlines are still looming and on the desks next to the sleep-deprived students are the usual culprits: greasy chips, sugary soda, instant noodles, and energy drinks. They are cheap, they are fast, and they are ubiquitous on campus. But what lies beneath the surface of the food that is helping students power through the long nights of studying? What lies beneath the surface of the food that is helping students power through the long nights of studying? For the last couple of months, I have been digging through the food culture of students on campus, and what I found shocked me. The food that helps students power through the long nights of studying may be silently killing them. Fatigue, weight gain, and early signs of metabolic diseases are fast becoming the norm before students even graduate. The biggest shocker is not the food itself, which is already known to be unhealthy.

It’s not about chips and soda. It’s about students gradually paying the price for every quick snack and energy drink. What’s behind all those late-night study sessions and school cafeterias is a silent epidemic: junk food quietly destroying students’ bodies, brains, and futures before they even graduate. Heart problems, fatigue, anxiety, and weight gain are no longer exceptions, but have become the new norm. So, if you’re ready, here’s something you might not know, and something that might change how you think about every meal you, or someone you care about, might be eating.

The nutritional void of junk food

What I have observed is that the increased rates of junk food consumption among us university students are part of a much larger pattern of increased consumption of unhealthy and processed foods in society. Heavy investments in food production, especially in the United States and the rest of the world, have led to the proliferation of these convenient and accessible foods such as burgers, pizzas, and snacks. To top it all off, this trend also gets a boost from the heavy marketing of these foods aimed at young adults like us. By targeting us at a young age, these companies ensure that these habits stick with us through life, making it hard for us to overcome these problems even as we witness the negative consequences of these habits among our peers.

The fundamental cause why junk food is so bad for university students like ourselves is because it provides an enormous amount of calories with zero essential nutrients. Burgers, pizzas, chips, and soda are all carefully crafted with refined sugars, bad fats, and sodium that give us an additional 500 calories per meal or an additional 2000 calories per day compared with nutrient-rich foods. These foods have zero vitamins (A, C, D, E) or minerals like calcium, magnesium, potassium, or iron.

A recent research conducted in Chile in 2025 on university students found severe nutrient deficiencies in vitamins A, C, D, E, and minerals like calcium, magnesium, potassium, and iron. Most of these students were found to have high sodium intake compared with the allowed limits. At the same time, these students were found to have barely met the fruit and vegetable or fiber intakes. This results in a condition called “hidden hunger,” where one may be full of calories but still starving for nutrients. These nutrient deficiencies cause fatigue, brain fog, decreased concentration, weakened immune systems, weight gain (70% of students), and decreased academic performance. A recent research conducted in 2025 found that removing junk food high in calories resulted in an increase in physical health of 7.5%. We are literally using junk food as fuel for our active lifestyles with zero nutrient value for our bodies and brains.

At 21, Brian believed that he was leading an ordinary college student’s life. Being in his third year, Brian was an economics major, and his days blended together in lectures, group work, and study sessions. Eating decent meals was something he felt he could not afford. Most days, Brian began his day with an energy drink, had chips for lunch, and bought instant noodles or a burger from the kiosk at night. It was all normal, or so he believed, since everybody around him was eating like that. But halfway through the semester, Brian began to notice that something was amiss. He was tired all the time, could not concentrate in class, and was gaining weight. One afternoon, in the middle of a lecture, Brian felt like he was going to have a heart attack. He went to see a doctor at the clinic, and it was there that Brian was asked something that he had never taken into account: “What exactly have you been eating?”

Experts agree that junk foods cause significant damage to university students’ brain health and academic performance. Burkhalter & Hillman (2011) proved that a nutrient-rich diet supplies the brain with building blocks to function optimally and improve cognitive abilities such as attention, memory, and scholastic performance. On the contrary, a nutrient-poor diet has detrimental effects on these brain functions.
Recent research by 2025 on junk foods has confirmed these effects. For instance, research published in Neuron by UNC School of Medicine revealed that junk foods high in fat interfere with hippocampus memory circuits in just a few days, causing overactive neurons and poor memory recall. These effects occur before weight gain. Virginia Tech research revealed that ultra-processed foods such as meat and sugary drinks increase cognitive problems by 17% and 6%, respectively. University of Sydney research revealed that high-fat and high-sugar diet consumption impairs spatial navigation and hippocampus function.
Experts agree that junk foods cause detrimental effects on university students’ brain health and academic performance. Junk foods cause brain fog, decreased focus, poor memory, and poor grades. These effects are preventable through a healthy diet. Junk foods are detrimental to university students’ health and should be replaced with healthy foods to attain optimal brain function.

Brian’s tale is not uncommon on today’s campuses. In fact, it is increasingly common. Students are living on energy drinks, on cheap processed foods, and are ignoring the subtle signs of trouble. Most students think the consequences are down the road a ways, beyond the graduation date. But as more and more campus health clinics are finding out, the consequences may already be here. One processed meal at a time.