Maria Reece Coaching, Counselling & Training

Maria Reece Coaching, Counselling & Training Online and face to face counselling for individuals and couples feeling anxious, confused, frustrate

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07/07/2026

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Dr. Qing Li, a Japanese-based immunologist originally from China, dedicated over two decades to scientifically validating the healing power of nature through the practice of shinrin-yoku, or “forest bathing”. His pioneering research focused on phytoncides, which are natural antimicrobial compounds and essential oils released by trees like cedars and pines to protect themselves from insects and disease. Through rigorous clinical studies, Dr. Li demonstrated that when humans inhale these airborne chemicals during a walk in the woods, the compounds enter the bloodstream and trigger profound physiological changes. His work effectively bridged the gap between ancient intuitive wisdom and modern biological science, proving that the forest acts as a natural medicine cabinet.

Dr. Li’s breakthrough findings revealed that these plant chemicals actively hunt down and reduce stress hormones while simultaneously supercharging the human immune system. His testing showed that exposure to phytoncides significantly decreases levels of cortisol, adrenaline and noradrenaline in the body. More importantly, his 20 years of research proved that breathing in the forest air dramatically boosts the activity and number of natural killer (NK) cells, a type of white blood cell vital for fighting off viruses and tumor cells. Remarkably, Dr. Li discovered that a single two-day trip to a forest could enhance NK cell activity for up to 30 days, providing conclusive evidence that trees physically alter our blood chemistry to fight stress and disease.

See PMID: 19568839, 17903349 & 29662662 for studies related to forest bathing 🙌🏻

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22/06/2026

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I never paid attention to which trees I stood near until a neurologist told me their chemical signatures are as different as w**e varietals—and your body's reading them whether you notice or not.

Phytoncides aren't just "tree smell." They're antimicrobial compounds trees release to protect themselves from insects and decay. When you breathe them in, your NK cells—natural killer cells that patrol for threats—increase activity by up to 50% within hours. But here's what stopped me cold: different trees produce different phytoncide profiles, and they affect your nervous system in measurably different ways.

Oak and cedar release steady, grounding compounds. People near them show slower heart rate variability—the pattern your nervous system makes when it feels safe. Pine and fir produce sharper, more volatile terpenes that correlate with increased alertness and cortisol dipping back to baseline faster after stress. It's why walking through a pine forest feels clarifying while sitting under an oak feels like exhaling tension you didn't know you were holding.

Your body's already choosing. That tree you detour toward on your walk, the one you lean against when you stop to catch your breath—that's not random. You're following a chemical conversation happening below conscious thought.

I've started noticing which trees pull me on different days. After bad sleep, I drift toward the pines near the parking lot. After tense meetings, straight to the massive red oak by the bench. My body knew before my brain caught up.

What tree are you drawn to when you need to reset? [Y2AIZ]

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