Free T3 to Reverse T3 Ratio

Concept

A key indicator of thyroid function. Baseline was 0.34, dropped to 0.15 after ketosis, and severely to 0.05 after fasting, before improving to 0.21 after refeeding.

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Results from Peter's 3 week "nothingburger" (1 week keto—1 week fast—1 week keto) (AMA #2)

Results from Peter's 3 week "nothingburger" (1 week keto—1 week fast—1 week keto) (AMA #2)

Peter Attia MD

A key indicator of thyroid function. Baseline was 0.34, dropped to 0.15 after ketosis, and severely to 0.05 after fasting, before improving to 0.21 after refeeding.