Robert Lustig:Why ALT Levels Are the Hidden Key to Understanding Metabolic Health Crisis #fattyliver
28 Jan 2025 · 1 min

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Robert Lustig explains that ALT (alanine aminotransferase), a standard liver-function test, indicates liver fat and metabolic dysfunction. He emphasizes that the historically accepted upper limit of normal for ALT was 25 U/L, but many lab reports now list 40 U/L because the population distribution has shifted right due to widespread fatty liver disease—masking pathology by inflating the reference range.










