Lactoferrin for Nutrient Absorption

Research suggests that lactoferrin, a protein naturally abundant in breast milk, may support nutrient absorption and gut health in infants, with multiple reviews and laboratory studies indicating it plays a role alongside other bioactive milk proteins in facilitating intestinal function and defense. The evidence base includes narrative reviews, animal studies using preterm piglets, and in vitro cell experiments, most of which point in a supportive direction, though one mixed study found that high-dose bovine lactoferrin in a preterm animal model did not reduce intestinal disease and may have worsened outcomes, while lower doses showed beneficial effects — highlighting that dose optimization remains an important unresolved question. Studies indicate that lactoferrin may resist full digestion and remain biologically active in the gut, which is considered a key mechanism for its potential effects, and researchers have explored producing it from non-human sources such as rice plants as a scalable alternative to breast milk-derived protein. Overall, the scientific rationale is considered promising by researchers in this area, but the available clinical trial evidence is limited, and authors across these studies consistently call for larger, well-controlled human trials before firm conclusions can be drawn about meaningful health benefits.