Lactoferrin is an iron-binding protein found in milk and bodily fluids, used to support iron absorption and prevent deficiency. It’s taken as a supplement for immune support, to reduce risk of infections (antibacterial/antiviral), improve gut health and reduce diarrhea, and promote wound healing. It’s also included in some infant formulas and probiotic products; evidence varies and benefits may be modest depending on condition.

Foods highest in lactoferrin are mammalian milks—especially human breast milk and bovine colostrum—and whey-derived dairy products. Colostrum (first milk) has the highest concentrations; regular cow’s milk and yogurt contain lower amounts, and processing (heat/pasteurization) can reduce levels. Lactoferrin is also available concentrated in whey protein and commercial supplements. Soft cheeses may retain some, but amounts vary.

No, lactoferrin is not a probiotic. It is an iron-binding protein found in milk and body fluids with antimicrobial, anti-inflammatory and immune-modulating effects. By sequestering iron and affecting microbes it can limit pathogens and help support beneficial gut bacteria, but it is not a live microorganism and therefore does not qualify as a probiotic.

Lactoferrin is an iron‑binding protein (not an enzyme) that helps defend the body by sequestering iron to inhibit bacterial growth and by directly disrupting microbes. It has antiviral, anti‑inflammatory and antioxidant effects, supports immune cell activity, promotes gut and mucosal health, enhances iron absorption, and aids wound healing. It’s abundant in milk and other secretions, contributing to innate host defense.

Many adults can take lactoferrin daily at typical supplement doses and it is generally well tolerated, though clear clinical benefits remain limited. Avoid starting it without medical advice if pregnant, breastfeeding, immunocompromised, have iron‑metabolism disorders, or are on iron therapy or immunosuppressants. Follow the product’s dosing, watch for gastrointestinal side effects, and check iron status or discuss with your clinician before long‑term use.

Avoid lactoferrin if you have a cow’s‑milk or milk‑protein allergy (including infants with cow‑milk allergy). People with iron‑overload disorders (e.g., hemochromatosis) or those taking high‑dose iron should avoid or consult a clinician. Pregnant or breastfeeding women and young infants should use it only under medical advice. Also check with your healthcare provider if you take prescription medicines or have chronic conditions.