At the Lowlands 2026 festival this weekend, hundreds of festival-goers are participating in a unique initiative called “Kapsalon Kopzorgen,” translated to Salon Headaches in English. Located inside the Lowlands Science Park right behind the main stage, visitors are voluntarily sitting in a barber’s chair to have a small tuft of hair snipped off to assist in groundbreaking cancer stress research, NU.nl reports.

This special project is a collaboration between Erasmus MC in Rotterdam and AYA Zorg Nederland, the national network for Adolescents & Young Adults with cancer.

The researchers are not collecting hair to make wigs; instead, they are using hair as a biological time capsule to study the physiological effects of chronic stress.

Human hair grows at an average rate of 1 centimeter per month. As it grows, it continuously absorbs and locks in cortisol, the body’s primary stress hormone. By cutting a multi-centimeter strand, scientists can look back month-by-month to measure a person’s exact long-term stress levels.

The donated tufts of hair are sent directly to the Erasmus MC laboratory, where they are finely ground into a powder, mixed with methanol to extract the locked-in hormones, and run through complex measuring instruments.

The study focuses specifically on AYA cancer patients, young adults aged 18 to 39 who receive a cancer diagnosis during a vital, developmental stage of life when they are starting careers, buying houses, or planning families.

Receiving a cancer diagnosis at a young age causes severe, long-term mental and physical stress that lingers for years even after the patient is declared “clean” or in remission.

While the researchers already have hair samples and data from over 500 young cancer patients via the national COMPRAYA study, they desperately needed a healthy control group of peers in the exact same age bracket to compare them against. Because Lowlands naturally draws tens of thousands of young adults, the festival serves as the perfect real-world testing ground.

To encourage participation and lower the threshold for nervous festival-goers, the researchers have turned the process into a fun, interactive experience inside a colorful shipping container.

Upon entering, participants fill out a short digital survey on a tablet regarding their daily life, career or study pressures, and current mental health.

Researchers carefully select and snip a small pluck of hair from the very back of the head. They ensure that the surrounding hair completely falls over the spot so the trim is entirely invisible to anyone on the festival grounds.

In exchange for the hair sample, visitors receive a complimentary head massage or a vibrant festival hairstyle. Participants can flip through a lookbook to customize their hair with feathers, colorful ribbons, and festival glitter before heading back out to the concert stages.

The data collected over these three days will help psychologists and oncologists better recognize chronic stress in young cancer survivors, allowing for more tailored, timely psychological support and aftercare.