Can Sauna Use Really Extend Lifespan?

Bryan Johnson advocates for sauna use as a highly effective health protocol, claiming it reduces toxins, improves vascular age, and enhances fertility, though medical experts caution that evidence for detox and microplastic removal is limited and that high-heat sauna exposure can temporarily affect male fertility. Regular sauna use is supported by evidence for cardiovascular and metabolic benefits, with safety recommendations including hydration and moderation.