Bryan Johnson· Author
Since the last test, the lab switched to EPA Method 1633, which is a newer, more sensitive PFAS method that looks for more compounds at lower detection limits than the previous panels.
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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.
Since the last test, the lab switched to EPA Method 1633, which is a newer, more sensitive PFAS method that looks for more compounds at lower detection limits than the previous panels.
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