Sleep serves as the foundation for nearly every bodily system, influencing hormone balance, immune function, mental clarity, and emotional regulation. Dr. Gracie McLaven, a London-based doctor and clinical psychologist, cautions that inadequate sleep could be causing health problems for approximately 10.8 million Brits. Missed sleep significantly impacts stress levels, food cravings, memory, resilience, and immunity, highlighting a pressing public health concern.
The Growing Importance of Sleep in Wellness Priorities
This warning emerges during Sleep Awareness Week, observed from March 8th to 14th, and World Sleep Day on March 13th. At a time when Britons are increasingly recognizing the value of sleep, many are prioritizing it as a key component of their overall wellness. A recent study involving 1,000 UK adults, conducted as part of the Platinum Spas Hot Tub’s 2026 Wellness Report, reveals that sleep ranks as the top wellness priority for millions this year.
Dr. Gracie McLaven, founder of Brain Body Wealth, explains, "Sleep underpins nearly every system in the body, from hormone balance and immune function to mental clarity and emotional regulation. However, when sleep is consistently disrupted, stress levels rise, cravings increase, focus declines, and burnout risk grows."
Five Key Effects of Sleep Deprivation on the Brain and Body
Dr. McLaven outlines five critical ways that insufficient sleep negatively affects both mental and physical health, based on insights shared with Platinum Spas.
1. Your Stress Levels Spike
When you fail to get enough sleep, cortisol, the body's primary stress hormone, becomes difficult to regulate. The nervous system remains on high alert, leading to feelings of tension, overstimulation, and a state of being "wired but tired." This condition can keep you awake even when exhausted, creating a vicious cycle of sleep disruption.
2. Cravings and Appetite Increase
Poor sleep disrupts the hormones responsible for controlling hunger and fullness, making individuals more prone to craving sugary and high-carbohydrate foods. Energy levels become unstable, often resulting in spikes and crashes throughout the day, which can further impair daily functioning.
3. Your Focus and Memory Decline
During deep sleep, the brain processes and consolidates memories. Without sufficient rest, concentration diminishes, decision-making slows, and productivity suffers. Even simple tasks may feel more demanding, affecting both personal and professional life.
4. Emotional Resilience Drops
Sleep plays a vital role in emotional regulation. When rest is lacking, mood becomes harder to manage, irritability increases, and everyday stressors can feel amplified. Over time, this may worsen anxiety symptoms, impacting mental health significantly.
5. Your Immune System Weakens
Consistent sleep disruption reduces immune cell activity, leaving the body less equipped to fight off illnesses. This can result in more frequent sickness and longer recovery times, underscoring the importance of sleep for maintaining robust health.
Brits' Struggle with Rest and the Broader Implications
The renewed focus on rest might surprise some, but previous studies indicate that over half of Brits (53%) report never feeling adequately rested. On average, individuals have not felt properly "rested" for nearly two months, pointing to a widespread issue.
Dr. Gracie adds, "Rest isn't laziness or indulgence; it's a biological and psychological need. It helps us regulate our nervous system, recharge emotionally, and build resilience. Without it, everything from our mood to our motivation and relationships begins to suffer."
This research is part of the 2026 Wellness Report from Platinum Spas Hot Tubs, which examines how people across the UK are shifting their attitudes toward health, wellbeing, and lifestyle habits in the coming year. The findings emphasize the critical role of sleep in overall wellness and the need for greater awareness and action to address sleep deprivation.
