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This product came up once on Tim Ferriss in the episodes we index. That mention was a genuine on-air recommendation, not just a passing reference. The people who brought it up: Dr. Peter Attia. Every occurrence below links to the episode page and to the exact second it was said on YouTube.
“Cystatin C is one that I think is largely underappreciated. So most doctors are using creatinine as the measure of kidney function. Creatinine is a joke.”— Dr. Peter Attia
The guest here is Dr. Peter Attia: Physician focused on longevity and healthspan, founder of Early Medical, and author of the book Outlive: The Science and Art of Longevity. Peter Attia unpacks the longevity science behind Outlive: muscle, VO2 max, glucose, cancer screening, and emotional health.