Plasma levels of phosphatidylcholine (PC) degradation products and carnitine precursors. Male Wistar rats were fed either a control diet (2% soy oil, 8% lard, 20% casein), or an experimental diet where casein and lard were replaced with phospholipid-protein complex (PPC) at 6% or 11% (wt%) for four weeks. Choline (A), trimethylamine-N-oxide (TMAO; B), carnitine (C), γ-butyrobetaine (D) and trimethyllysine (TML; E) were measured in fasting plasma samples. Values shown are means with standard deviation (n = 6). One-way analysis of variance (ANOVA) with Dunnet’s post hoc test was used to determine values significantly different from control (**
p < 0.01, ***
p < 0.001).