1. A composition comprising lactoferrin for use in the prevention, reduction or treatment of diarrhea. 2. The composition of claim 1, wherein the diarrhea is non-infectious diarrhea. 3. The composition of claim 1, wherein the diarrhea is diarrhea during weaning diarrhea. A composition according to claim 1, intended to reduce the duration of diarrhea. 5. A composition according to claim 1, intended to reduce the severity of diarrhea. 6. A composition according to claim 1, intended to reduce the incidence of diarrhea. 7. A composition according to claim 1, intended to delay the onset of diarrhea. The composition of claim 1, wherein lactoferrin is added. The composition of claim 1, wherein the lactoferrin is provided as a fraction of milk. The composition according to claim 1, which is administered to infants or children, for example, babies born by Caesarean section, babies born in preterm birth, or babies with intrauterine growth retardation (IUGR). The composition according to claim 1, which contains lactoferrin in an amount corresponding to about 5-500 mg of lactoferrin / kg body weight / day, 15-400 mg of lactoferrin / kg body weight / day, 50-350 mg of lactoferrin / kg body weight / day, and / or 100-300 mg of lactoferrin / kg body weight / day. 12. A composition according to claim 1, which is administered at least daily, for example, at least 3 times every day or at least 5 times every day. A composition according to claim 1, which is administered to humans or animals, in particular companion animals or domestic animals. The composition of claim 1, which is selected from the group consisting of infant formula for feeding infants, an infant formula, a mixture for feeding newborn animals, a nutritional supplement, a nutritional supplement, a food product and a drink.1. Композиция, содержащая лактоферрин, для применения в предотвращении, уменьшении или лечении диареи.2. Композиция по п. 1, где диарея является неинфекционной диареей.3. Композиция по п. 1, где диарея
