Choline and betaine concentrations in plasma discriminate levels of dietary choline intake in healthy adults: analysis of a double-blind randomized crossover controlled feeding study. - Trujillo-Gonzalez I; Horita DA; Stegall J; Coble R; Paules EM; Lulla AA; Baah E; Bottiglieri T; Sha W; Kohlmeier M; Friday WB; Zeisel SH (The American journal of clinical nutrition, 2026)