The Surprising Link Between Sunglasses And Hormonal Imbalance

During the summer in the UK, we diligently wear sunglasses and apply sunscreen to protect ourselves from the sun’s rays. However, there’s an interesting aspect to consider: could our reliance on sunglasses potentially affect our hormonal balance? Let’s explore the complex relationship between sunglasses and hormonal health, and how these accessories might impact our well-being.

Vitamin D Deficiency and Sunlight

Let’s begin with Vitamin D, often referred to as the “sunshine vitamin” due to its crucial role in maintaining bone density, supporting immune function, and reducing inflammation. Despite its significance, a substantial portion of the population in regions with limited sunlight, such as the UK, grapples with Vitamin D deficiency. While supplementation during winter months is common, sunlight remains the primary source for synthesising this essential nutrient.

Wearing sunglasses, applying generous amounts of sunscreen, or adopting sun-protective clothing inadvertently impedes the absorption of UV rays necessary for Vitamin D production. These rays stimulate biochemical reactions in the skin that culminate in Vitamin D synthesis. By diminishing exposure to sunlight, we contribute to the issue of Vitamin D insufficiency, exacerbating an already widespread concern.

Circadian Rhythm and Light Signalling

Our physiological rhythms, notably the circadian rhythm governing our sleep-wake cycles, are intricately linked to light exposure. Natural sunlight, particularly its blue and red light spectra at specific times of the day, serves as crucial cues for regulating these biological rhythms.

Wearing sunglasses throughout the day disrupts these vital light signals that synchronise our internal clocks with external environmental cues. UV rays, notably prevalent during mid-morning and early afternoon, play a pivotal role in triggering the production of hormones like melatonin and dopamine—essential for maintaining optimal sleep patterns, mood stability, and overall physiological balance. By shielding ourselves from these UV rays with sunglasses, we inadvertently disrupt our body’s natural hormonal regulation, potentially leading to imbalances in metabolism, cognitive function, and overall health.

The Blue Light Dilemma

In addition to natural sunlight, modern lifestyles expose us to significant amounts of artificial blue light emitted by electronic devices and indoor lighting. Exposure to blue light, particularly in the evening hours, suppresses the production of melatonin, a hormone crucial for signalling the onset of sleep. Disrupted melatonin levels have been linked to various health issues, including hormonal disturbances, metabolic disorders such as diabetes and obesity, and an increased susceptibility to certain cancers.

Managing our exposure to blue light, particularly in the hours preceding bedtime, is essential for preserving a healthy circadian rhythm and supporting overall health and well-being.

Building a Solar Callus

Our ancestors thrived under the sun’s radiant gaze without the aid of modern-day sun protection. Over time, they developed what can be described as a “solar callus,” gradually acclimatising to sunlight exposure and reaping its benefits. In contrast, contemporary lifestyles often involve extended periods indoors or the use of sunglasses and sunscreen to limit sun exposure.

To harness the benefits of sunlight while minimising potential risks, consider embracing morning sunlight before 10 am without the hindrance of sunglasses or electronic devices. This practice helps “prime” our bodies to optimally absorb sunlight throughout the day, facilitating the synthesis of melanin—a protective substance that shields the skin from sunburn and supports various physiological processes.

Balancing Light Protection: Blue-Blocking Glasses

While safeguarding ourselves against harmful UV rays and blue light is paramount, achieving a balance between light exposure and protection is crucial. Blue-light blocking glasses are a valuable tool in this regard. These are designed to filter out a significant portion of blue light emitted by electronic screens and indoor lighting, thereby promoting a more aligned circadian rhythm.

During daylight hours, wearing glasses that block approximately 60% of blue light proves beneficial, particularly in environments saturated with artificial lighting. These glasses aid in maintaining the body’s natural circadian rhythm by mitigating the disruptive effects of blue light exposure during the daytime.

As evening approaches and we prepare for sleep, transitioning to glasses offering 100% blue light blocking creates an environment conducive to restful sleep. By reducing exposure to blue light during these crucial periods, we support the natural production of melatonin and enhance our chances of experiencing quality sleep.

The Bottom Line

Research in functional medicine, nutrition, and sunlight exposure reveals the surprising effects of sunglasses on hormonal balance and overall health.

 Sunglasses can hinder Vitamin D synthesis and disrupt circadian rhythms, while blue light presents additional challenges. Our choices regarding light exposure and protection profoundly influence our well-being.

By understanding these dynamics and making informed decisions, such as integrating blue-blocking glasses into our daily routine, we can optimise circadian rhythms, promote hormonal equilibrium, and safeguard our health in an environment increasingly dominated by artificial light.

Embrace the benefits of sunlight while managing potential risks. Consider how sunglasses affect your body’s hormonal systems and employ strategies like blue-blocking glasses to enhance your overall health and well-being. With this knowledge, navigate the sunny days of summer mindfully, preserving your hormonal balance and supporting your body’s natural rhythms for optimal health.