There’s nothing I look forward to more every spring than stepping outside on a clear sunny morning and taking a deep breath of fresh, clean air after a long winter cooped up indoors! And what a blessing it is to realize that this free gift God has given us is one of the simplest and best things we can do for our own personal health.
I was curious about this recently and was amazed when a quick Internet search showed that organizations from the Centers for Disease Control and Prevention to the National Institutes of Health and even the World Health Organization all agree on the significant preventative health benefits of access to green space and natural environments.
Long before modern medicine began measuring the benefits of sunlight, oxygen and physical activity, we as humans have been benefiting in ways we often take for granted from the beautiful, natural world provided by our Creator. Research confirms what God knew all along: time outdoors supports immune function, mental health and overall vitality. Regular physical activity — particularly outdoor movement — is linked with improved long-term health and reduced mortality. In that sense, fresh air may truly function as “free medicine,” a cost-effective and globally accessible means to improve public health.
It’s no surprise that Scripture reflects this integrated design. In Genesis, humanity’s first home was a garden, a living ecosystem filled with light, nourishment and restorative rhythms that sustained both body and spirit. “The heavens declare the glory of God; the skies proclaim the work of his hands” (Psalm 19:1).
One of the clearest examples of creation’s health-supporting design is sunlight. Exposure to natural light enables the body to produce vitamin D, a nutrient essential for bone density, immune resilience and inflammation regulation. Adequate vitamin D levels also improve calcium absorption and may reduce the risk of certain chronic illnesses. What a testimony to our Creator’s loving design that something we enjoy is also good for us!
And of course, only moderate sun exposure is needed, often about 15 to 30 minutes per day, to help maintain sufficient vitamin D levels, recognizing the balance necessary to protect our skin from over-exposure. Even the busiest among us have time to take a quick 15-minute walk at some point during the day to reap these benefits.
It’s not only our physical health that is impacted by sunlight; it also influences mental wellness. Most of us are likely familiar with the idea of circadian rhythms and how natural light helps regulate our sleep-wake cycles. Another beneficial side effect relates to hormone production. Exposure to daylight supports serotonin activity, a neurotransmitter associated with mood stability. Time spent in natural environments is consistently associated with lower levels of anxiety and depression. It’s no wonder we find those quick walks outdoors so restorative! As Proverbs 17:22a affirms, “A cheerful heart is good medicine.”
Clean air and oxygen-rich environments remain foundational to cellular metabolism and cognitive function. International health leaders report that communities with access to green space experience lower stress levels and improved long-term health outcomes.
What's sometimes known as “forest bathing” – spending time in the woods – has been shown to reduce cortisol (stress hormone) levels, and time spent in green spaces is linked to reduced stress biomarkers and improved cardiovascular health.
Natural light exposure also improves sleep quality. Daylight regulates melatonin production, supporting healthy sleep cycles as noted earlier, but it also improves cognitive performance and immune function. Consistent daytime light exposure contributes to improved productivity, emotional regulation and overall well-being across diverse populations. Who knew there were so many benefits to just a little bit of sunlight each day?!
Finally, a look at nutrition shows that it also reflects God’s intentional design. There’s no arguing the benefits of consuming whole foods rich in essential vitamins and antioxidants. Federal nutrition experts confirm that vitamin C supports immune defense, vitamin K plays a vital role in blood clotting and bone health, and vitamin A supports vision and immune resilience.
God has indeed provided in nature everything we need for life and health. Psalm 104:14 declares, “He makes grass grow for the cattle, and plants for people to cultivate, bringing forth food from the earth.”
Here at Cedarville University, where I serve, our School of Pharmacy students are trained to value both pharmaceutical innovation and preventive health practices. They study evidence-based medicine while learning to counsel patients on lifestyle factors including nutrition, safe supplementation, exercise, and responsible sun exposure. While prescription therapies remain essential for managing chronic conditions such as diabetes, hypertension, and asthma, it's encouraging that global health organizations are beginning to emphasize that preventive strategies like sunlight and time spent outdoors significantly reduce long-term disease risk.
Our students are also equipped to evaluate potential interactions between herbal products, over-the-counter supplements, and prescription medications. Natural products can interact with medications and should be assessed carefully. This integrated, evidence-based approach prepares graduates to deliver whole-person care that unites scientific rigor, preventive health care, and a biblical worldview.
International health leaders continue to promote outdoor physical activity as a cost-effective strategy for chronic disease prevention something our parents and grandparents knew all along. Walking, gardening and recreational movement improve circulation, strengthen muscles and release endorphins, which are the body’s natural mood elevators.
For those of us seeking a biblically informed approach to wellness, the message is practical and accessible: sunlight, clean air, nutritious food, restorative rest and wise medical care serve as foundational pillars of preventive health care.
Health authorities advise balance and discernment. Individuals with specific medical conditions should consult health care professionals before making significant changes to sun exposure, supplementation or exercise routines.
In a world shaped by screens, demanding schedules and rising stress levels, some of the most effective health practices remain simple: a midday walk, coffee at sunrise or quiet reflection outdoors. These habits reconnect individuals with rhythms that promote physical, mental and spiritual well-being.
Fresh air is “free medicine” because it reflects a design that sustains life across nations and generations. Modern medical advances and restorative natural patterns are not competing forces but work hand in hand to aid in advancing global health, preventive medicine and human flourishing – as God intended.
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