1. An oral composition containing lactoferrin in a concentration of at least 0.1 g / 100 kcal of the composition. The composition according to claim 1, which is selected from the group consisting of food products, animal products, pharmaceutical compositions, nutritional formulations, nutraceuticals, beverages, dietary supplements, infant formula. A composition as claimed in any preceding claim wherein lactoferrin is delivered as part of milk or a lactoferrin-rich whey fraction. 4. The composition of claim 1, comprising a protein source, a lipid source, and a carbohydrate source. The composition of claim 4, wherein the protein source is present in an amount of 1.4-4.0 g / 100 kcal of the composition. The composition of claim 4, wherein more than 50% of the mass of the protein source is whey protein. The composition according to claim 4, wherein the lipid source provides 30-55% of the total energy value of the composition and / or the carbohydrate source provides 35-65% of the total energy value of the composition. The composition of claim 1, wherein the lactoferrin is present in a concentration range of about 0.01-100 g, preferably 0.1-50 g, even more preferably 2-25 g per 100 kcal. The composition according to any one of claims 1, 2 or 4, further comprising at least about 70 mg / l sialic acids, at least about 0.1% omega-3 fatty acids by weight of the total amount of fatty acids and / or at least about 0.25% omega-6 fatty acids by weight of the total amount of fatty acids. 10. A composition according to any one of claims 1, 2, 4-8, which is administered in an amount corresponding to the intake of at least 0.01 g of lactoferrin per kg of body weight per day. Composition�1. Композиция для приема внутрь, содержащая лактоферрин в концентрации, по меньшей мере, 0,1 г/100 ккал композиции.2. Композиция по п.1, которая выбрана из группы, состоящей из пищевых продуктов, продуктов для животных, фармацевтических композиций, питательных рецептур, нутрицевтиков, напитков, биоло
