Nick NorwitzMD PhD, Oxford-Harvard | Metabolic Health Educator | “Stay Curious”

Heat Your Brain Up: Sauna’s Secret to Neuroplasticity

29 May 2025 · 1 min

Watch on YouTube

1:06

The video explains how exposure to heat, such as sauna sessions or hot‑water immersion, raises levels of two key brain‑protective factors: brain‑derived neurotrophic factor (BDNF) and heat‑shock proteins (HSPs). A cited study showed that 20 minutes of immersion in 42 °C water significantly increased BDNF compared with thermoneutral water. BDNF supports neuroplasticity—the brain’s ability to form new connections—enhancing memory and learning and potentially shielding against neurodegenerative diseases like Alzheimer’s and Parkinson’s. Heat‑shock proteins, also elevated by sauna use, assist proper protein folding, helping to prevent the accumulation of misfolded proteins (e.g., alpha‑synuclein, amyloid, tau) that underlie these diseases. The overall claim is that regular heat exposure can boost brain health through these molecular pathways.

Chapters

Saunas can increase levels of the brain protective hormone brain-derived neurotrophic factor. One study showed that a heat challenge, in this case 20 minutes of hot water immersion at 42°C, significantly increased BDNF levels, whereas immersion in a control thermoneutral water did not. What does BDNF do? BDNF, brain-derived neurotrophic factor, supports neuroplasticity, the brain's ability to form new connections. It improves memory and learning and may protect against neurodegenerative diseases like Alzheimer's disease and Parkinson's disease. Furthermore, saunas increase levels of something called heat shock proteins. Heat shock proteins help other proteins fold properly, which is absolutely critical in preventing neurodegenerative diseases like Alzheimer's and Parkinson's. Both of which are characterized by misfolded proteins, like alpha-synuclein in Parkinson's disease and amyloid and tau in Alzheimer's.