Bryan Johnson· Author
These units start at approximately $50 (with filter changes every 2–3 months costing around $20) and can dramatically improve your indoor air quality.
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
These units start at approximately $50 (with filter changes every 2–3 months costing around $20) and can dramatically improve your indoor air quality.
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First, I would buy a HEPA air filter. A small unit cost $50 and can dramatically improve your air quality. Every room in my house has one. I travel with them. They're just a great investment.