This site exists to close a small but real gap in the sauna conversation. Most of what you can find online is either spa marketing or supplement-industry claims. I wanted a place where patients and clinicians could read the evidence honestly, cite sources, and come out with a clearer sense of what sauna therapy actually does and does not do.

Editorial mission

The mission is plain. Evidence first, always. Respect the tradition behind the research. Name the limits of the data. Warn people clearly when heat therapy is not for them. Keep the site independent of any sauna manufacturer, supplement company, or clinic network. The only disclosed exception to that independence is the clinic directory, which lists my own practice first. That's stated openly on the directory page and again here.

A word on honoring the Finnish tradition

The sauna is not an American invention. It is not a wellness-industry product. It is a practice that grew out of the long winters of Finland, where families and communities have gathered in small wooden rooms warmed by stone and fire for generations. Finns speak of löyly, the spirit-breath of the steam. They have birthed children in the sauna. They have washed the bodies of the dead. They have talked politics, made music, and healed from work in it. Any site that synthesizes contemporary research on sauna owes a debt to that lineage.

This site tries to carry that debt lightly and honestly. Where the research maps onto traditional Finnish sauna practice, we say so. Where it does not (for example, when discussing infrared cabinets that did not exist when most of the foundational research began), we say that too. We are not Finns, and we are not experts on Finnish culture. We are students of a research literature that grew out of one.

About the author

Dr. Michael Hummel, NMD, is a board-certified naturopathic physician and the founder of Hummel Medical in Ashland, Oregon, a practice focused on regenerative wellness and longevity. He completed his naturopathic medical degree at Sonoran University of Health Sciences (formerly SCNM), a one-year residency at Cameron Wellness Center in Salt Lake City, a two-year residency at Envita Medical Center in Scottsdale, and five additional years of intensive integrative oncology training in Scottsdale. He practices alongside his wife Mary Hummel, MS (Nutritionist), and also sees patients one day per week via telemedicine through Denver Naturopathic Clinic.

He is the creator of the Bountiful Herbs Botanical Medicine Database and co-hosts the SpiritRx Podcast with Dr. Luke. When he is not with patients, he writes at venturesinwisdom.com and produces music under the name HumNyX.

Sauna therapy has been part of his clinical toolkit for years, particularly within detoxification protocols and cardiovascular support. This site is his attempt to put the evidence base down in one honest place.

Editorial independence

This site accepts no advertising from sauna manufacturers, no placement fees in the clinic directory, and no sponsorship from supplement or wellness brands. The only disclosed commercial interest is that Hummel Medical, the editor's practice, is listed first in the Find a Provider directory. Every other clinic is listed alphabetically.

If you spot a factual error on this site, email info@hummelmed.com. Corrections are published with timestamps.

A plain safety reminder

Heat therapy has real contraindications. Unstable cardiac disease, recent heart events, severe hypertension, pregnancy in some contexts, certain medications, and alcohol use are the big ones. If you have any doubt, talk with your physician before starting a regular sauna practice. Specific guidance is on the Research page.

Cardiac precautions

If you have had a heart attack or acute coronary syndrome within the last three months, have unstable angina, have decompensated heart failure, have uncontrolled arrhythmias, or have severe aortic stenosis, do not use a sauna until you have spoken with your cardiologist. If you have a stable cardiac condition, the evidence is actually favorable, but initiation of a regular practice should still be discussed with your physician. Do not use a sauna alone.

Pregnancy

Guidance varies by country and by trimester. Meaningful core temperature elevation in early pregnancy has been associated with fetal risk in some studies. When in doubt, avoid sauna during pregnancy unless you have specific clearance from your obstetric care provider.

Contact

Corrections, clinic directory submissions, and editorial questions: info@hummelmed.com.