I believe nature is the original healer. Not because science says so, but because something in me has always known it.
I live in Southern Oregon, surrounded by trees. I am happiest when I am walking through a forest. Before I understood the chemistry of what I was actually breathing when I walked through the forest, I just thought I was "a nature person." Turns out there's a lot more going on.
The Japanese figured this out before the researchers did. They called it shinrin-yoku (森林浴) (forest bathing). Not a hike. Not a workout with a scenic backdrop. Just being in the forest, slowly, with all your senses on. The practice got its official name in 1982 from Japan's Ministry of Agriculture, Forestry, and Fisheries.
The Government wanted to figure out why this practice was so good for the people's health.
By the 1990s, researchers were in the woods with cortisol strips and blood pressure cuffs trying to figure out why this worked. What they found surprised even them.
What Forest Bathing Does to Your Body, According to Research
Peer-reviewed studies, systematic reviews, and meta-analyses from the last two decades keep arriving at the same conclusions.
Stress hormones drop measurably after spending time Forest Bathing. Time in forest environments significantly reduces cortisol, adrenaline, and noradrenaline. Participants in multiple studies showed not just subjective feelings of calm but measurable shifts in their autonomic nervous system. Parasympathetic activity (rest and restore) increasing, sympathetic activity (fight or flight) decreasing. A 2024 study in Frontiers in Psychology confirmed that forest bathing improves stress management at a physiological level, enhancing what researchers call "sympathovagal balance." That's a technical way of saying your nervous system finds its footing again.
The immune system pays attention. Natural killer (NK) cells (the white blood cells that respond to cellular threats) increase significantly after forest exposure. In studies where participants spent three days in a forest environment, NK cell activity increased substantially, with effects persisting for more than a week afterward. Not hours. More than a week.
Mood shifts show up on validated psychological tests. Using tools like the Profile of Mood States (POMS) test, researchers found shinrin-yoku consistently reduces anxiety, tension, depression, and fatigue, while increasing vigor. In a study of 498 healthy volunteers, hostility and depression scores decreased significantly and liveliness scores increased significantly on forest days compared to control days. These are reproducible, measurable outcomes, not people just feeling relaxed because they had a nice walk.
Blood pressure and heart rate follow. Multiple studies have found that forest environments reduce pulse rate noticeably compared to urban settings. The cardiovascular response to nature appears to be real physiology, not a side effect of light exercise.
Phytoncides: The Healer in the Forest
This is what makes me excited to share with you. Those of us nature lovers are truly feeling what science can now see.
Most of the physiological response to forest bathing isn't about the scenery or the quiet, it's about what's in the air. Trees continuously emit volatile compounds called phytoncides, literally "plant defenders." These are chemicals trees produce as part of their own defense system, protecting against pathogens, insects, and environmental threats. When you walk through a conifer forest, you're inhaling them constantly.
The primary phytoncides in forest air: α-pinene, β-pinene, limonene, linalool, camphene, bornyl acetate.
If you've been reading my constituent breakdowns, those names are not new to you. They are exactly what you find in tree-derived essential oils like fir, pine, hinoki, spruce. Dr. Qing Li, one of the leading researchers in forest medicine, identified phytoncides as a key mechanism behind the immune and stress effects of shinrin-yoku. The evidence suggests that inhaling these compounds triggers similar physiological pathways as physically being in the forest.
Alpha-pinene is alpha-pinene. You can find it in the forest or in a bottle of Certified Pure Tested Grade Essential Oil.
In our modern world a slow walk in the forest may not be possible for everyone everyday but we can all turn on a diffuser at night or take a few moments to inhale some Shinrin Yoku from doTERRA.
How doTERRA Bottled the Chemistry of Forest Air
When doTERRA's science team began looking at shinrin-yoku research, they asked a specific question: what if someone can't get to the forest?
They analyzed the actual phytoncide composition ratios measured in conifer forest air and formulated the Shinrin-Yoku Forest Bathing Blend to replicate that chemistry using CPTG® essential oils, primarily hinoki and fir, which are naturally rich in α-pinene and β-pinene. The goal wasn't to replace a walk in the woods. It was to give your body access to the same compounds on the days when you can't get there like urban living, winter, a week that went completely sideways.
Clinical research supports that diffusing terpene-rich essential oils promotes a calming environment for focusing and centering. The chemistry works because it's the same chemistry.
How to Practice Shinrin-Yoku (With or Without a Forest)
Shinrin-yoku has no goal, no destination, no steps to hit. That's the whole point. You're not going anywhere. You're arriving.
In nature:
- Slow way down. Two hours is the traditional recommendation; even 20–30 minutes shifts things.
- Phone in your pocket, ideally at home.
- What do you hear right now? What's under your feet? Stop and actually smell the air.
- Sit somewhere for longer than feels comfortable. That's where it starts to work.
At home with the blend:
- Diffuse it while you sleep, journal, meditate, or just sit. No agenda required.
- Long, slow inhales through the nose, you're trying to actually absorb the compounds, not just smell something nice.
- Put it on with a carrier oil before something hard. Or after.
- Open a window. Take your shoes off outside for five minutes.
Your nervous system learns by association. You're essentially teaching it what "safe" smells like.
Diffusing Essential Oils While You Sleep: What the NK Cell Research Shows
I love this because it is a simple ritual that brings big rewards.
The NK cell studies (the ones showing significant increases in immune activity after phytoncide exposure) were done with participants inhaling these compounds for extended periods. Dr. Brannick Riggs, doTERRA's VP of Essential Oil Education, has been transparent about this: the research that informed how doTERRA recommends using this blend involves diffusing for up to eight hours a night. His personal protocol is six to eight drops in a diffuser right next to his bed, every single night.
That's not a casual suggestion. That's someone who read the underlying phytoncide inhalation research and took it seriously.
The logic tracks with what we know about how the body works overnight. Sleep is when your nervous system consolidates, your immune system does its heaviest lifting, and your stress hormones are supposed to drop to their lowest point. Giving your body eight hours of continuous phytoncide exposure during that window when you're relaxed, breathing deeply, not distracted is the perfect habit to cultivate. It's actually closer to what a night in the forest would feel like than anything you'd get in a 20-minute morning diffuse session.
If you want to also support sleep quality specifically, Dr. Riggs suggests pairing Shinrin-Yoku with doTERRA Serenity in the same diffuser. You're not choosing between them, you're getting the calming, nervous-system chemistry from Serenity alongside the phytoncide exposure from Shinrin-Yoku.
Why Your Nervous System Needs This More Than Ever
Here's a number that keeps coming back to me: in the 1800s, only 3% of the world's population lived in cities. Now it's over half. Our nervous systems haven't had time to adapt to that shift, evolutionarily speaking, cities are brand new.
Shinrin-yoku isn't a trend. It's a correction. A body that spent most of human history surrounded by trees still expects to find them.
The forest didn't change. We just moved away from it.
Arin Fugate
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