- Crystals & the Code of Life: How IBM's Marcel Vogel and Fritz Popp's Biophoton Discovery Bridged Science and Spirit
- Negative Air Ions Alleviate Particulate Matter-Induced Inflammation and Oxidative Stress in the Human Keratinocyte Cell Line HaCaT. Clinical findings indicate that negative air ions exert anti-inflammatory and antioxidant effects in cells exposed to particulate matter. Therefore, negative air ions can be used for the prevention and treatment of particulate matter-related inflammatory skin diseases. Annuls of Dermatology 2021 Mar https://pmc.ncbi.nlm.nih.gov/articles/PMC8082002/
- Effect of negative air ions on physiological and perceived psychological stress during computer operation. Computer-oriented stress and psychological stresses were found to be significantly reduced with Negative Air Ions. International Journal of Environment and Health 2010 https://www.inderscience.com/offers.php?id=33035
- Negative ion treatment increases positive emotional processing in seasonal affective disorder. C J Harmer et al. Psychol Med. 2012 Aug. https://pubmed.ncbi.nlm.nih.gov/22152099/
- Healthline — “Do Healing Crystals Work? Lore, History, Research.” Explores historical roots, how crystals are used today, and how intention, placebo, and mindfulness may support perceived benefits, offering medically reviewed insights using crystals as tools for personal empowerment and self-care. https://www.healthline.com/health/healing-crystals-what-they-can-do-and-what-they-cant