Scientific Evidence · Meditation Research
Research 01 · Harvard Medical School · 2025 RCT
"I'd spent years searching for something that would actually stick. The first session here, I understood why it hadn't- and what was different."
Meditation
Yoga
Stress education
Psychological
Perceived stress, anxiety, depression, wellbeing, and quality of life — measured through internationally validated self-report tools. This is the layer most people expect meditation to affect, and it did.
→ Meditation group showed significant improvements across all five measures
Allostatic load biomarkers
Cortisol, blood pressure, BMI, blood glucose, and cholesterol — the body's physical stress response, measured directly in blood and tissue. This is the layer the mind is too slow to fake.
→ Biological stress markers shifted alongside psychological improvements
Gene expression
Changes in how genes are expressed at the molecular level — not whether genes exist, but whether they are switched on or off. This is the deepest layer of biological change science can currently measure.
→ First direct evidence that meditation reaches down to the DNA level
Denninger JW, Joss D, Romero PM, Khalsa SBS, Hoge EA, Bhasin M, Lazar SW et al. · Harvard Medical School / MGH · Frontiers in Psychology, Vol.16 · September 2025 · DOI: 10.3389/fpsyg.2025.1653242
Used with permission — Dr. Sara W. Lazar, Harvard Medical School
Research 02 · Our Own Study · Mental Health Science
Mental Health Scores by Practice Level
Lower score = better mental health (SCL-90 scale)
Level 1–2
Level 3-4
Level 5-6
Level 7
SCL-90 International Standard — 9 measured domains
Study Information
Author
Prof. Lee In-su, Korea National University of Transportation
Tool
SCL-90 (Derogatis, 1973 · International Standard)
Journal
Journal of Holistic Education, Vol. 4, 2012
Method
One-way ANOVA + Scheffe's post-hoc test · SPSS 14.0
Title
The effect of this meditation levels on mental health
References · Research Sources
01
Mindfulness practice leads to increases in regional brain gray matter density
Hölzel BK, Lazar SW et al. · Harvard Medical School / MGH
Psychiatry Research: Neuroimaging, Vol.191 · Jan 2011 · PMC3004979
02
Meditation experience is associated with increased cortical thickness
Lazar SW et al. · Harvard, Yale, MIT, MGH
NeuroReport, Vol.16(17) · Nov 2005 · PubMed: 16272874
03
Brain waves and meditation — EEG changes during nondirective meditation
Lagopoulos J et al. · NTNU + University of Sydney
ScienceDaily · March 2010
04
The effect of this meditation levels on mental health
Prof. Lee In-su · Korea National University of Transportation
Journal of Holistic Education, Vol. 4 · 2012
Used with permission — Dr. Sara W. Lazar, Harvard Medical School
Research 03 · Neuroscience · Harvard Medical School
HARVARD MEDICAL SCHOOL / MGH
MINDFULNESS-BASED STRESS REDUCTION · LONGITUDINAL MRI STUDY 2011
Before · Baseline
8 WEEKS MBSR
After · Post-MBSR (8 weeks)
Hippocampus
Memory & learning → gray matter density ↑
Posterior Cingulate Cortex
Self-awareness & mind calming → gray matter ↑
Temporo-parietal Junction
Empathy & compassion → gray matter ↑
Amygdala
Stress & anxiety center → density ↓ (positive change)
* Simulation based on Harvard research data · Hölzel BK, Lazar SW et al. (2011) · Psychiatry Research: Neuroimaging · PMC3004979
EEG Brain Wave Analysis — Before & After Meditation
Electroencephalography · Alpha · Theta · Beta wave analysis · NTNU + Sydney Univ. + Harvard MGH
International EEG Standard
Key Findings
76% probability of brain wave changes beginning within the first minute of meditation
Immediate effects even for beginners — no prior experience
required
Theta wave changes measured at 10 standard deviations outside normal range
Brain changes persist beyond the meditation session
into everyday life
Used with permission — Dr. Sara W. Lazar, Harvard Medical School
