Sauna Bathing and Dementia Risk in Finnish Men

Last reviewed 2026-10-04 by Jack Mayeux, APRN, FNP. This page is clinical content and is reviewed on a regular schedule.

Medically reviewed by Jack Mayeux, FNP

Men who used a sauna 4-7 times a week had about 66% lower dementia risk over 20 years.

This article walks through the Age Ageing (2017) (https://doi.org/10.1093/ageing/afw212) paper in plain English: what was studied, what changed, what the limits are, and what it does not prove. Full citation and DOI link (https://doi.org/10.1093/ageing/afw212) are at the end, with a PubMed record (https://pubmed.ncbi.nlm.nih.gov/27932366/).

What the study found

Using the Kuopio Ischaemic Heart Disease cohort, researchers followed 2,315 apparently healthy Finnish men aged 42 to 60 for a median of 20.7 years, comparing sauna frequency at baseline with later diagnoses of dementia and Alzheimer's disease.

After adjusting for age, alcohol, BMI, blood pressure, smoking, diabetes and other factors, 4-7 sauna sessions a week were associated with a 66% lower dementia risk (HR 0.34) and lower Alzheimer's risk (HR 0.35) vs one session. This was observational, and only 201 men were in the most frequent group.

Key finding (from the study record): 4-7 sessions/week vs 1: dementia HR 0.34; Alzheimer's HR 0.35 over 20.7 years.

How the study was done

• Design: Prospective cohort (KIHD) • Who was studied: 2,315 Finnish men aged 42-60 • Journal / year: Age Ageing (2017) • First author: Laukkanen T et al.

From the abstract: BACKGROUND: there are no previous studies linking repeated heat exposure of sauna and the risk of memory diseases. We aimed to investigate whether frequency of sauna bathing is associated with risk of dementia and Alzheimer's disease. SETTING: prospective population-based study.

What it means — and what it does not

Useful takeaway: Men who used a sauna 4-7 times a week had about 66% lower dementia risk over 20 years.

Limits and caveats: Observational; small numbers in the frequent group (201 men); association only.

This evidence can inform a conversation with a licensed provider. It is not a guarantee of similar results for you, and it is not a recommendation to start, stop, or change any medication on your own.

Related research we cite

• Association between sauna bathing and fatal cardiovascular and all-cause mortality events (https://doi.org/10.1001/jamainternmed.2014.8187) — JAMA Intern Med (2015); also on PubMed (https://pubmed.ncbi.nlm.nih.gov/25705824/). Takeaway: Finnish men who used a sauna 4-7 times a week had 63% lower sudden cardiac death risk than once-a-week users.

How this connects to care

A2Z serves men in Utah with telehealth evaluation, labs, and provider-guided plans when appropriate. The TRT program is $149/month and includes initial labs only. Tadalafil and enclomiphene, sermorelin, and tirzepatide (compounded, not FDA-approved) are separate products.

Relevant pages on this site:

• TRT program (https://a2ztrt.com/trt)

FAQ

What did this study actually find?

Men who used a sauna 4-7 times a week had about 66% lower dementia risk over 20 years. The design was: Prospective cohort (KIHD). Population: 2,315 Finnish men aged 42-60.

Does this mean I should start treatment?

No. Research informs care; it does not prescribe it. A licensed provider reviews your symptoms, labs, and history before any decision. Results vary.

What are the main limits of this evidence?

Observational; small numbers in the frequent group (201 men); association only.

Keep reading

• Can You Drink Alcohol on TRT? What Men Should Know (https://a2ztrt.com/post/can-you-drink-alcohol-on-trt) • Does TRT Cause Hair Loss? What the Evidence Actually Says (https://a2ztrt.com/post/does-trt-cause-hair-loss) • What Is a Normal Testosterone Level, Really? (https://a2ztrt.com/post/what-is-a-normal-testosterone-level) • TRT and Insulin Sensitivity in Men With Type 2 Diabetes (https://a2ztrt.com/post/testosterone-insulin-sensitivity)

Practical questions to bring to a consult

Research is most useful when it turns into better questions:

• Do my symptoms and labs line up with the kind of men this study enrolled? • Which of the study’s limits apply to me (age, heart risk, anemia, fertility goals, medications)? • What monitoring would we use if we tried a related therapy — hematocrit, PSA, glucose, sleep, or something else? • Are we talking about a branded FDA-approved medication, a different formulation, or a compounded product that is not FDA-approved?

A short, honest consult is the right place for those answers — not a social post. Start a free consult in Utah (https://a2ztrt.com/contact).

Reference

Laukkanen T et al. Sauna bathing is inversely associated with dementia and Alzheimer's disease in middle-aged Finnish men. Age Ageing. 2017. https://doi.org/10.1093/ageing/afw212 (https://doi.org/10.1093/ageing/afw212) · PubMed 27932366 (https://pubmed.ncbi.nlm.nih.gov/27932366/).

Next step

Start a free consult in Utah (https://a2ztrt.com/contact). Bring your questions — including anything this study raised for you.

The TRT program is $149/month and includes initial labs only. Tadalafil and enclomiphene, sermorelin, and tirzepatide (compounded, not FDA-approved) are separate products.

Talk to a licensed provider. Results vary. Not medical advice.