O-65 - Plasma choline rose significantly in every arm including the egg arm, confirming choline was absorbed
Key control finding: the egg TMAO null is not due to non-compliance or failed choline absorption - circulating choline rose in the egg arm just as in the TMAO-raising choline-tablet arms.
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Why this is evidence
Circulating choline rose in the egg arm just as in the TMAO-raising free-choline arms, so the egg TMAO null is not malabsorption or non-compliance - the block sits at the gut-microbial conversion step. That localization is what H-28 (form governs microbial TMA production) predicts and what a naive amount-driven reading behind H-42 does not.