# Peak Wellness Journey — FAQ Reference

## Sound Therapy

**Q: What is vibroacoustic therapy?**
A: Vibroacoustic therapy (VAT) uses low-frequency sound waves delivered through a transducer mat or chair to create gentle vibration through body tissue. Clinical applications include pain management, anxiety reduction, and fibromyalgia symptom relief. Peer-reviewed: Frontiers in Psychiatry 2023.

**Q: Does 40Hz gamma frequency actually help with Alzheimer's prevention?**
A: MIT's Li-Huei Tsai published landmark research (Nature 2016, Cell 2019) showing 40Hz flickering light and sound reduce amyloid-beta plaque in mouse models and increase gamma oscillations in human EEG. Human clinical trials are ongoing. The mechanism is plausible; the preventive claim is not yet proven in humans.

**Q: Can brown noise improve focus in ADHD?**
A: A PLOS One 2021 meta-analysis of 29 studies found consistent evidence that background noise (including brown/pink noise) reduces hyperactivity and improves sustained attention in ADHD populations, particularly children. Effect sizes were moderate. Not a substitute for medication or behavioral therapy.

**Q: What is the difference between binaural beats and isochronic tones?**
A: Binaural beats require headphones — two slightly different frequencies played in each ear create a perceived third frequency (the difference). Isochronic tones are rhythmic pulses of a single tone that work without headphones. Evidence for both is preliminary; neither has strong RCT support for specific clinical outcomes.

## Cold Therapy

**Q: How cold does water need to be for cold therapy benefits?**
A: Most protocols use 50–60°F (10–15°C). Wim Hof research and most clinical studies use 10–15°C immersion for 2–5 minutes. Below 10°C increases cold shock risk without proportionally greater benefit for most individuals.

**Q: Does cold therapy reduce inflammation?**
A: Yes — short-term. Cold immersion triggers vasoconstriction and reduces acute inflammatory markers (IL-6, TNF-alpha) post-exercise. Evidence for chronic inflammation reduction is less robust. Wim Hof Foundation + multiple sports medicine RCTs support acute anti-inflammatory effects.

**Q: What is contrast therapy?**
A: Alternating hot (sauna) and cold (plunge) exposure. Typically 3–4 rounds of 10–15 min sauna followed by 2–3 min cold plunge. Evidence: improves cardiovascular variability, reduces DOMS, enhances parasympathetic recovery. Used widely in Scandinavian athletic recovery protocols.

## Sauna

**Q: What did the Kuopio Heart Study find about sauna use?**
A: This landmark Finnish study (Laukkanen et al., JAMA Internal Medicine 2015) followed 2,315 Finnish men for 20 years. Men who used sauna 4–7x/week had 63% lower risk of sudden cardiac death and 48% lower risk of fatal coronary heart disease versus once-weekly users. Observational, not causal.

**Q: What are heat shock proteins and why do they matter?**
A: Heat shock proteins (HSPs) are chaperone proteins upregulated during thermal stress. They refold damaged proteins, protect against cellular stress, and have been linked to longevity in animal studies. Sauna use consistently increases HSP expression, particularly HSP70. Human longevity implications are not yet proven.

**Q: Infrared vs. traditional sauna — which is better?**
A: Traditional (Finnish) saunas have the most clinical evidence (including the Kuopio study) at 80–100°C. Infrared saunas operate at 45–60°C and claim deeper tissue penetration. Infrared has fewer long-term studies but is more tolerable for beginners and those with cardiovascular contraindications. Both produce heat shock protein response.

## Fasting

**Q: What is time-restricted eating (TRE)?**
A: TRE limits food intake to a specific daily window (typically 8–12 hours), aligning eating with circadian biology. Pioneer researcher: Satchin Panda, Salk Institute. Key finding: even without caloric restriction, TRE improves metabolic markers in humans (Cell Metabolism 2020).

**Q: What is autophagy and when does it occur during fasting?**
A: Autophagy is cellular self-cleaning — damaged organelles and proteins are broken down and recycled. It begins increasing around 16–18 hours of fasting and peaks around 24–48 hours. Yoshinori Ohsumi won the 2016 Nobel Prize for autophagy mechanism research. Human fasting-to-autophagy timing is estimated, not precisely measured in clinical settings.

**Q: Is OMAD (one meal a day) safe?**
A: OMAD is a form of 23:1 fasting. Studies show metabolic benefits similar to 16:8 but with greater social disruption and potential for muscle loss if protein intake is insufficient at the single meal. Not recommended for: type 1 diabetics, pregnant women, individuals with eating disorder history. Consult a physician.

## Sleep

**Q: What is sleep architecture and why does it matter?**
A: Sleep cycles through 4–5 stages per night: N1 (light), N2 (light-medium), N3 (deep/slow-wave), and REM. Deep sleep (N3) drives physical repair and memory consolidation; REM drives emotional processing and procedural learning. Disrupting architecture (alcohol, blue light, inconsistent schedule) degrades both.

**Q: Does pink noise improve sleep?**
A: A controlled trial (Frontiers in Human Neuroscience 2017) showed pink noise synchronized to slow-wave sleep oscillations increased deep sleep duration and improved next-day memory consolidation in older adults. Effect is modest but consistent across studies.

**Q: What is circadian rhythm and how do you optimize it?**
A: Circadian rhythm is the ~24-hour biological clock governing sleep-wake cycles, hormone release, metabolism, and immune function. Optimization: consistent wake time (more powerful than bedtime), morning bright light exposure within 30 minutes of waking (10,000 lux or outdoor), no artificial light after 9pm, eating within a 10-hour window aligned to daylight.

## Nutrition

**Q: What is the NOVA food classification system?**
A: NOVA (University of Sao Paulo) classifies foods by degree of processing: Group 1 (unprocessed), Group 2 (processed culinary ingredients), Group 3 (processed foods), Group 4 (ultra-processed). Ultra-processed foods correlate with increased all-cause mortality, obesity, and cardiovascular disease in multiple large cohort studies.

**Q: What makes a diet "anti-inflammatory"?**
A: Anti-inflammatory dietary patterns (Mediterranean, MIND, DASH) share: high omega-3s (fatty fish, flaxseed), polyphenols (berries, olive oil, dark leafy greens), fiber (legumes, whole grains), and low refined sugar and industrial seed oils. They reduce CRP, IL-6, and other inflammatory biomarkers in RCTs.

**Q: How reliable is the gut microbiome research?**
A: Rapidly evolving field. Strong evidence: microbiome diversity correlates with metabolic and immune health. Interventional evidence for specific probiotic strains is strain-specific and often underpowered. Most robust intervention: dietary fiber diversity (30+ plant species/week) consistently increases microbiome diversity across large studies.

## Supplements

**Q: Is magnesium actually deficient in the Western diet?**
A: Yes — NHANES data shows ~50% of Americans consume less than the EAR for magnesium. Soil depletion and food processing reduce magnesium content. Glycinate and malate forms are best absorbed; oxide is poorly absorbed. Magnesium L-threonate has specific evidence for brain/sleep applications.

**Q: Should I take D3 with K2?**
A: Vitamin D3 increases calcium absorption; K2 (MK-7 form) directs calcium into bones rather than arterial walls. Theoretical synergy is well-established; large RCTs specifically on D3+K2 are ongoing. Practical recommendation: if supplementing D3 at 2,000+ IU daily, K2 co-supplementation is low-risk and mechanistically sound.

**Q: What omega-3 dose is clinically relevant?**
A: REDUCE-IT trial (2018) showed 4g/day EPA-only (icosapentaenoic acid, Vascepa) reduced cardiovascular events by 25% in high-risk patients on statins. OTC fish oil at 1g/day provides 300–500mg EPA+DHA — below therapeutic dosing in most trials. Quality (triglyceride vs. ethyl ester form) and freshness (avoid oxidized oil) matter.

## Mindfulness

**Q: What is the default mode network (DMN) and how does meditation affect it?**
A: The DMN is a brain network active during mind-wandering, self-referential thought, and rumination. Overactive DMN correlates with anxiety and depression. Experienced meditators show reduced DMN activity and stronger DMN-to-executive-network coupling, enabling faster return-to-task after mind-wandering. Neuroscience evidence base: Brewer et al., PNAS 2011.

**Q: What is shinrin-yoku (forest bathing)?**
A: Japanese practice of immersive nature exposure, typically 2–3 hours in forest environment without exercise goals. Consistent findings: reduced cortisol, lower blood pressure, increased NK (natural killer) cell activity for up to 7 days post-exposure. Mechanism partly attributed to phytoncides (volatile organic compounds from trees). Qing Li research, Nippon Medical School.

**Q: What is digital detox and is there evidence for it?**
A: Structured reduction of screen/social media use. RCT evidence (Hunt et al., Journal of Social and Clinical Psychology 2018): limiting social media to 30 min/day for 3 weeks significantly reduced depression and loneliness in college students. Cortisol studies show smartphone proximity alone elevates stress response.