A new study from Well Pharmacy Online Doctor has uncovered a surprising link between poor sleep quality and hair loss, a connection that two-thirds of Brits are unaware of. The research highlights how inadequate rest disrupts the body’s natural repair processes, potentially leading to thinning hair and reduced hair quality. With 67% of surveyed individuals oblivious to this relationship, experts are urging people to prioritise sleep as part of their hair health regimen.

George Sandhu, deputy pharmacy superintendent at Well Pharmacy Online Doctor, explains the science behind the findings. “During sleep, your body does most of its repair work, and that includes your hair,” he says. “Consistently poor sleep can lead to increased stress hormones like cortisol, which can trigger hair thinning and even hair loss over time.” This repair process, driven by growth hormones released during deep sleep, is essential for regenerating hair follicle cells and maintaining hair strength and shine.

The study surveyed 500 Brits, revealing that 67% did not know sleep quality impacts hair health, while an equal percentage were unaware it could contribute to hair loss. Sandhu emphasises that sleep is often an overlooked factor in hair care, overshadowed by treatments and products. Yet, the evidence suggests that addressing sleep could be a game-changer for those struggling with hair issues.

Sandhu identifies key ways poor sleep affects hair health:

• Increased hair thinning with sleep deprivation. Studies show that people who regularly get less than six hours of sleep are 30% more likely to report issues with hair thinning. Inadequate rest disrupts the hair growth cycle, pushing follicles into the shedding phase prematurely, even with short-term sleep deficits.
• Reduced hair quality and appearance. Poor sleep diminishes shine and elasticity, leaving hair dull and brittle. When the body doesn’t get enough restorative sleep, it prioritises essential functions over hair maintenance, affecting nutrient distribution to the scalp.
• Hormone regulation through consistent sleep. A regular sleep schedule stabilises hormones tied to hair growth. Irregular patterns disrupt the circadian rhythm, throwing off the balance needed for healthy follicles.
• Circulation benefits during sleep. Deep sleep boosts scalp circulation, delivering oxygen and nutrients to follicles. This increased blood flow supports the production of keratin, the protein that makes up hair strands. Poor sleep compromises this process.

For those looking to improve both sleep and hair health, Sandhu offers practical advice. He recommends maintaining a consistent sleep schedule, using silk pillowcases to reduce breakage, and avoiding tight hairstyles before bed. Soft scrunchies should replace elastic hair ties, and wet hair should be dried before sleeping to prevent fragility. Keeping bedrooms cool also supports sleep quality and scalp health. “It’s not just about how many hours you sleep, but the quality of that sleep,” he stresses. “Deep, restorative sleep phases are when your body produces the proteins that build hair strength.”

The findings align with broader research on sleep’s role in physical health. Studies have found that chronic sleep deprivation elevates cortisol levels, correlating with hair follicle stress. Well Pharmacy’s survey adds a public awareness dimension, exposing a knowledge gap that could affect millions. With hair loss impacting self-esteem for many, this study suggests a simple, accessible solution: better sleep.

While hair loss treatments remain valuable, Sandhu advocates combining them with good sleep hygiene for optimal results. “Getting proper rest allows your body to repair and regenerate hair follicles naturally,” he says. But he advises consulting a GP for persistent hair thinning to rule out underlying conditions and explore tailored treatments.