FIGURE 3.
Human milk amino acids that differ significantly in concentration between term and preterm milk. Values are means ± SEMs. (A) Glutamine. P values represent the significance of postpartum day of lactation on glutamine concentration by using an LMM (term) or an LM (preterm). (B) Lysine. P values represent the significance of postpartum day of lactation on lysine concentration by using an LMM (term) or an LM (preterm). Lysine concentration is also influenced by the maturity of the infant (P = 6.7 × 10−3) *Significant difference in mean concentration between term and preterm milk at a specific time point, P < 0.05. For both glutamine and lysine: milk collected on postpartum day 0–5, n = 15 term and n = 10 preterm; milk collected on postpartum day 14, n = 14 term and n = 10 preterm; and milk collected on postpartum day 28, n = 15 term and n = 6 preterm. LM, linear model; LMM, linear mixed-effects model.