A fit, healthy 39-year-old was nearly sent for a liver biopsy. The cause? Was it that he went to the gym before every blood draw or because his supplement was throwing his labs off?. Dr. Jordan Feigenbaum and Dr. Austin Baraki break down the blind spot that sends thousands of healthy athletes down an expensive, potentially unnecessary diagnostic rabbit hole every year.

Timestamps:

00:01:09 Introducing the Case
00:03:44 How to Read a Liver Panel: ALT, AST, GGT, Alk Phos, Albumin Explained
00:10:50 What Is GGT and Why Does It Matter Clinically?
00:16:38 Why Exercise, Protein, and Creatine Aren't on the Differential (Yet)
00:17:35 The Workup: Hepatitis Panels, Abdominal Ultrasound, and More
00:19:42 Second Set of Labs — The Mystery Deepens
00:25:25 Updated Differential: What's Still on the List?
00:27:08 The Labs Normalize — A Critical Clue Appears
00:31:40 The Reveal: Exercise Was the Cause All Along
00:32:18 The Mechanism: How Exercise Elevates 'Liver' Enzymes
00:32:54 Point 1 — ALT & AST Are Not Exclusively Liver Enzymes
00:33:49 Point 2 — It's Unavoidable: 100% of Lifters Are Affected
00:36:02 Point 3 — It Takes 10–12 Days to Normalize
00:37:00 Point 4 — It's Mostly Harmless
00:38:27 56% of Physicians Miss This Diagnosis
00:38:48 Why Clinicians Overlook Exercise History
00:44:01 Point 5 — GGT as the Differentiator (And Its Limits)
00:46:42 Why Alkaline Phosphatase Also Rises Post-Workout
00:48:51 The Cost of Missing Lifestyle Context: Over- and Under-Diagnosis
00:53:29 What to Say to Your Doctor: 3 Patient Scripts
00:59:31 5 Key Takeaways
01:00:25 Final Advice from Dr. Baraki

Next Steps

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Barbell Medicine Vital 5 Action Plan: https://www.barbellmedicine.com/vital-5-action-plan/

Resources:

Case: https://pubmed.ncbi.nlm.nih.gov/37025214/
https://pubmed.ncbi.nlm.nih.gov/29059178/
https://pmc.ncbi.nlm.nih.gov/articles/PMC7438350/
https://pubmed.ncbi.nlm.nih.gov/18557801/
https://pubmed.ncbi.nlm.nih.gov/19209234/
https://pubmed.ncbi.nlm.nih.gov/11476029/
https://pmc.ncbi.nlm.nih.gov/articles/PMC11165564/
https://pmc.ncbi.nlm.nih.gov/articles/PMC12460594/
https://pmc.ncbi.nlm.nih.gov/articles/PMC2291230/
https://pmc.ncbi.nlm.nih.gov/articles/PMC11319523/
https://pmc.ncbi.nlm.nih.gov/articles/PMC3936967/
https://pmc.ncbi.nlm.nih.gov/articles/PMC12188904/
https://pmc.ncbi.nlm.nih.gov/articles/PMC7969109/
https://pmc.ncbi.nlm.nih.gov/articles/PMC11498664/
https://pmc.ncbi.nlm.nih.gov/articles/PMC3104191/

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