Peter Attia, Andrew Huberman, and other longevity-focused physicians and researchers publish specific numeric targets for markers a standard lab report only flags as "in range." Every target here is attributed to the person who cited it, sourced from a podcast, book, or interview, not a FixFirst clinical claim.
A standard lab reference range is built from the middle 95% of a general population. It tells you whether a result is common, not whether it is optimal for a specific longevity goal.
The physicians and researchers in this section publish narrower, more specific targets than a standard lab report uses, and they say so publicly, on their own podcasts, in their own books, and in their own interviews. FixFirst did not invent these numbers. Each page below names the person, the target they cite, their stated reasoning, and the primary source, so you can weigh the claim yourself rather than take it on faith.
This is different from the reference ranges labs use to flag "abnormal," which are covered on the optimal blood test ranges guide. That page compares lab-standard ranges against functional-medicine "optimal" ranges broadly. This section goes one level deeper: specific experts, specific numbers, specific citations.
Upload your blood report and FixFirst checks it against the standard clinical thresholds these expert targets are measured against, adjusted for your sex and context.
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