Core Body Temperature Study

Sunlighten (2001). This third-party test shows the near-perfect emissivity of Sunlighten's SoloCarbon far infrared heater technology. It raises core body temperature 3 degrees, which is vital to achieving a deep, detoxifying sweat from the cellular level.

Blood, Urine, and Sweat Study: Monitoring and Elimination of Bioaccumulated Toxic Elements

Pubmed (2011). A small study assessed the concentration of 120 toxic compounds in three body fluids, and found many toxic elements appeared to be preferentially excreted through sweat. Included infrared sauna for sweat inducement.

Regular Sauna Bathing and the Incidence of Common Colds

Pubmed (1990). This clinical trial found that regular sauna use likely reduces the incidence of common colds.

The Blood Pressure Study OR A Study of the Health Benefits of Far Infrared Sauna Therapy

UMKC (2005). This clinical study found that far infrared heat temporarily lowers both systolic and diastolic blood pressure. This is the only study done on IR sauna technology on the market vs in a controlled medical environment.

Far Infrared Sauna Use Temporarily Lowers Blood Pressure and Aids in Decreasing Waist Circumference

Canadian Journal of Diabetes (2010). A clinical study over three months found cardiovascular benefits and reduced waist circumference in people with type 2 diabetes with regular infrared sauna use.

Waon therapy improves quality of life as well as cardiac function and exercise capacity in patients with chronic heart failure with chronic heart failure

Pubmed (2015). Study of 49 patients with chronic heart failure who received far infrared sauna and waon therapy daily for 3 weeks showed improvements in mental health, exercise ability and improved cardiac function.

Feasibility and acceptability of a Whole-Body hyperthermia (WBH) protocol

Taylor&Frances (2021). Follow up to 2016 WBH study. This 2019-2020 interventional study used a far infrared sauna dome heated to appx 135°F for up to 110 minutes to achieve core body temp of 101.3°F, with the participant's head outside the sauna and cleared the way for further clinical trial underway 2021-2023.

Feasibility and acceptability of a Whole-Body hyperthermia (WBH) protocol

Pubmed (2012). A published scientific review discussing the advances in delivery techniques for non-heating FIR and validates its real and significant biological effects.

Air Quality Testing - Sauna IAQ Report

APEX (2020). Sunlighten's third-party sauna review of ultra-low VOC's and airborne metals


Mattson M. P. (2008). Hormesis defined. Ageing research reviews, 7(1), 1–7.

The Science of Saunas

Sauna Use and Building Resistance to Stress with Dr. Rhonda Patrick

Weight Loss

Dean W. (1981). Effect of Sweating. JAMA. 1981;246(6):623.

McLeod K.


Yoshimizu N. (2009). The Fourth Treatment for Medical Refugees: Thermotherapy in the New Century.


Rogers, M. (2001). Detoxify or Die

Genuis, S.J., et al. (2016). Human elimination of organochlorine pesticides: blood, urine, and sweat study. BioMed Res Int.

Genuis, S.J., et al. (2011). Blood, urine, and sweat (BUS) study: monitoring and elimination of bioaccumulated toxic elements. Arch Environ Contam Toxicol. 2011; 61: 344–357

Genuis, S. J., et al. (2012). Human excretion of bisphenol A: blood, urine, and sweat (BUS) study. Journal of environmental and public health, 2012, 185731.

Sears, M. et al. (2012). Arsenic, Cadmium, Lead, and Mercury in Sweat: A Systematic Review. Journal of Environmental and Public Health. 2012. 184745.

Rea, W.J. (2018). A large case-series of successful treatment of patients exposed to mold and mycotoxin. Clin Ther. 2018; 40: 889–893.


van der Zee J. (2002). Heating the patient: a promising approach? Annals of Oncology 2002; 13(8):1173–1184

Tatsuo, I. et al. (2009). Non-thermal Effects of Far-Infrared Ray(FIR) on Human Hepatocellular Carcinoma Cells HepG2 and their Tumors. Journal of Cancer Science & Therapy. 01. 10.4172/1948-5956.1000012.

Cardiovascular Health

Dean W. (1981). Effect of Sweating. JAMA. 1981;246(6):623.

Laukkanen, T., et al. (2015). Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Internal Medicine 175, no. 4 (April 2015): 542.

Masakazu I., et al. (2001). Repeated thermal therapy improves impaired vascular endothelial function in patients with coronary risk factors. J Am Coll Cardiol. 2001 Oct, 38 (4) 1083-1088.

Zaccardi, F., et al. Sauna Bathing and Incident Hypertension: A Prospective Cohort Study. American Journal of Hypertension 30, no. 11 (June 2017): 1120–25.

Ketelhut, S., et al. (2019). The blood pressure and heart rate during sauna bath correspond to cardiac responses during submaximal dynamic exercise. Complementary Therapies in Medicine. 44. 218-222.

Tei, C., et al. (2016). Waon Therapy for Managing Chronic Heart Failure Results From a Multicenter Prospective Randomized WAON-CHF Study Circulation Journal 80, no. 4 (2016): 827–34.

Setor K. K., et al. (2018). Sauna bathing reduces the risk of stroke in Finnish men and women. Neurology. May 2018, 90 (22) e1937-e1944;

Inflammation & Pain

Matsushita, K. (2008). Efficacy of Waon therapy for fibromyalgia. Internal Medicine. Aug 15, 2008, 47(16):1473-6.

Lidija K., et al. (2003). Immunomodulatory Effects of Low-Intensity Near-Infrared Laser Irradiation on Contact Hypersensitivity Reaction. Photodermatol Photoimmunol Photomed 2003; 19: pp 203–212, Blackwell Munksgaard.

Laukkanen, J.A. et al. (20180. Sauna bathing and systemic inflammation. Eur J Epidemiol (2018) 33: 351.

Matsumoto, S. et al. (2011). Effects of thermal therapy combining sauna therapy and underwater exercise in patients with fibromyalgia. Complementary therapies in clinical practice. 17. 162-6.


Laukkanen, T., et al. (2015). Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Internal Medicine 175, no. 4 (April 2015): 542.

Dementia & Memory Loss

Tanjaniina L., et al. (2017). Sauna bathing is inversely associated with dementia and Alzheimer's disease in middle-aged Finnish men, Age and Ageing, Volume 46, Issue 2, March 2017, Pages 245–249.


Imamura, M., et al. (2001). Repeated thermal therapy improves impaired vascular endothelial function in patients with coronary risk factors. Journal of the American College of Cardiology 38, no. 4 (October 2001): 1083–88.

Kokura, S.i, et al. (2007). Whole body hyperthermia improves obesity-induced insulin resistance in diabetic mice. International Journal of Hyperthermia 23, no. 3 (January 2007): 259–65. 

Beever, R. The effects of repeated thermal therapy on quality of life in patients with type II diabetes mellitus. The Journal of Alternative and Complementary Medicine. Jun 2010.

Physical Fitness

Scoon, Guy S.M., et al. Effect of post-exercise sauna bathing on the endurance performance of competitive male runners. Journal of Science and Medicine in Sport 10, no. 4 (August 2007): 259–62.


B.A. Russell, et al. (2005). Study to Determine the Efficacy of Combination LED Light Therapy (633nm and 830 nm) in Facial Skin Rejuvenation. Journal of Cosmetic and Laser Therapy, 2005; 7: pp 196-200.

Lee, J. H., et al. (2006). Effects of infrared radiation on skin photo-aging and pigmentation. Yonsei medical journal, 47(4), 485–490.