Anyone with even a passing interest in longevity already knows certain fundamentals: a balanced diet, sleep stage monitoring, and a structured training protocol. Having control over your own body may seem like the key to a long life. Yet there is another factor that is often overlooked: the environment in which we live. Understanding how our surroundings communicate with our cells is the missing link in holistic health management.
The Exposome: Genes Are Not Everything
For decades, the traditional medical approach focused primarily on the human genome, treating it as the ultimate source of answers about health and longevity. Today, longevity science takes a completely different perspective by using the concept of the exposome. The term was first introduced by epidemiologist Christopher Paul Wild to describe the total sum of environmental exposures the body encounters from the moment of birth¹.
The key to understanding the significance of the exposome is epigenetics, a relatively young and rapidly developing field of science represented at the Elevate Summit by experts including Professor Ewelina Pośpiech, Professor Tomasz Wojdacz, and Dr. Dorota Komar.
Epigenetics examines how external factors such as toxins, stress, diet, and climate influence the expression of our genes. Having a genetic predisposition to inflammatory diseases or faster cellular aging is not a sentence. It is primarily the environment that sends chemical signals that “switch” specific sequences in the genome on or off. Our surroundings literally determine how biology reads its own code.
We discuss the importance of epigenetics for longevity in greater detail in our article: Why Do We Age? 12 Mechanisms That Shape Lifespan.
Artificial Lighting and Sleep Quality
Light pollution, known as ALAN (Artificial Light at Night), is one of the most significant yet frequently ignored environmental stressors. For thousands of years of evolution, the human body functioned according to a rhythm determined by sunrise and sunset. Today, very few people live this way. Research shows that simply spending the evening in a brightly lit living room, under so called room light, is enough to significantly delay and shorten the body’s natural melatonin release². The brain interprets a bright ceiling light as an artificial extension of the day, disrupting the body’s early preparation for recovery.
The situation becomes much more serious when standard lighting is combined with the screens that surround us. Smartphones, laptops, and e readers emit large amounts of blue light. When it reaches the retina from a short distance, it sends an extremely strong signal to the biological clock, almost completely suppressing melatonin production and disrupting sleep stages³. As a result, we wake up feeling more tired and find it harder to become fully alert during the day.
Air Quality: An Invisible Factor Accelerating Aging
Air pollution, especially in winter, is an issue that cannot be ignored. Numerous studies clearly show that chronic exposure to particulate matter such as PM2.5 and PM10 has effects extending far beyond respiratory problems. These microscopic particles can pass directly from the lungs into the bloodstream and even cross the blood brain barrier. They cause systemic oxidative stress and systematically accelerate aging processes at the cellular level.
Less intuitively, escaping outdoor smog by staying at home does not always provide a safe refuge. Modern people spend a large part of their lives indoors. For this reason, preventive medicine is paying increasing attention to a phenomenon known as sick building syndrome, or SBS. Paradoxically, the air in our homes and offices can be several times more polluted than the air outside!
Indoor air quality is reduced primarily by volatile organic compounds, or VOCs, released from interior materials such as paint, flooring panels, and adhesives used in furniture. Biological contaminants such as mold and fungal spores are also common problems, especially when they multiply in poorly maintained air conditioning systems or damp corners of bathrooms. Carbon dioxide, or CO2, is another factor. In an unventilated bedroom, its concentration often exceeds recommended levels by morning, directly reducing sleep quality. The result can be morning brain fog, headaches, and reduced concentration during the day.
Microplastics: Intruders in Our Cells
Another element of the exposome receiving increasing scientific attention is small plastic particles. Microplastics and nanoplastics are now present everywhere, including drinking water, food, and the air. Recent medical findings clearly confirm the presence of microplastics in the human bloodstream, brain, and even the placenta⁴!
Microplastics behave like intruders in the body and may trigger chronic inflammatory responses. Worse still, plastics carry endocrine disruptors such as bisphenols and phthalates. These substances can imitate natural hormones, including estrogens, disrupting metabolism, thyroid function, and the reproductive system.
The Healing Power of Nature: The Benefits of Forest Bathing
Understanding that the environment can work against us also makes it possible to use it therapeutically. An excellent example is the Japanese concept of shinrin-yoku, or “forest bathing,” which has been officially incorporated into preventive health programs in many Asian countries.
A walk in the forest is, of course, a wonderful form of relaxation, but the benefits of “forest bathing” reach much deeper, all the way to our cells. Trees release phytoncides into the atmosphere, volatile compounds with antibacterial and antifungal properties. Research shows that inhaling phytoncides measurably stimulates the autonomic nervous system and supports the body’s ability to fight infections.
A walk through the forest not only effectively lowers heart rate and reduces the production of stress hormones, but also increases the activity and number of NK cells, or Natural Killer cells, in the blood⁵. These specialized immune cells form the body’s first line of defense against pathogens and cancerous mutations.
Designing Your Own Microclimate: Four Steps Toward Change
Although we do not have full control over the global ecosystem, optimizing the immediate microclimate of our homes is an excellent step toward better health. Here is what you can do to begin taking better care of your surroundings:
- Filter and replace the air: Investing in a home air purifier with a HEPA filter, especially one operating in the bedroom, can significantly reduce the burden on the immune system. The foundation, however, remains the habit of thoroughly ventilating rooms just before sleep, which helps lower carbon dioxide levels effectively.
- Block blue light: It is worth reducing screen exposure during the 90 minutes before bedtime. Blue blocking glasses, warm screen filters on devices, and replacing bedroom bulbs with those that emit warm, gentle light can all help.
- Get morning sunlight: To reset the internal biological clock and optimize nighttime melatonin release, expose your eyes to natural daylight within the first hour after waking. This is the most effective way to synchronize the circadian rhythm.
- Make conscious contact with nature: Incorporating “green microdoses” into your weekly schedule is an excellent idea. Even a slow 30 minute walk through a park without a phone allows the parasympathetic nervous system to reduce tension within the cardiovascular system.
Conclusions
Our cells constantly respond to air quality, light, and environmental toxins, while genetics merely adapts to these conditions. Conscious management of your personal microclimate is therefore a fundamental element of prevention today, without which even the best diet and training plan cannot deliver their full benefits.
Sources
- https://aacrjournals.org/cebp/article/14/8/1847/258124/Complementing-the-Genome-with-an-Exposome-The
- https://pmc.ncbi.nlm.nih.gov/articles/PMC3047226/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC4313820/
- https://pubmed.ncbi.nlm.nih.gov/33395930/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC2793341/
