Heat shock proteins (HSP70, HSP90) are induced by heat stress and protect cells from protein misfolding and apoptosis. Senescent cells have impaired HSP induction capacity — they upregulate HSPs less effectively than healthy cells under heat stress. This differential response may make senescent cells selectively vulnerable to heat stress followed by senolytic treatment.

Is there evidence that sauna enhances senolytic effects?

No direct human clinical evidence. The mechanistic rationale (impaired HSP response in senescent cells → increased vulnerability) is supported by in vitro data. This is a biologically plausible protocol used by longevity practitioners without definitive evidence.

Can heat stress alone clear senescent cells?

Heat stress alone does not consistently achieve senolysis. The HSP impairment in senescent cells creates vulnerability, but BCL-2 inhibition (senolytics) is needed to trigger apoptosis.