Dose–response relationship between dietary protein and plasma tHcy, tCys concentrations. Estimated mean (and 95% CI) plasma tHcy (A) and tCys (B) concentrations according to the intake of different types of protein after adjustment for age, sex, body mass index, waist hip ratio and total energy intake by additive Gaussian generalized regression model. n = 965. Middle lines, the estimated dose–response curves; up and below lines, 95% CIs. P values are from corresponding multiple linear regression analyses. The lowest and highest 2.5 percentiles of protein intakes are not included.
Xiao et al. Nutrition Journal 2013 12:144 doi:10.1186/1475-2891-12-144