Orsadin Inmun Kids 250ml is a food supplement in which three compounds have been combined: Lactoferrin, Lactoperoxidase and Zinc, which have scientifically proven their effectiveness and joint action with vitamin D3. Lactoferrin: protein present in mammalian milk and considered a “natural antibiotic” that has demonstrated its action against bacteria, viruses, parasites and fungi by different mechanisms, being considered one of the main mechanisms of the defense system against infections. Lactoperoxidase: is an enzyme present in human tissues and biological fluids, it is an active part of the non-immune or generic natural defense system, with a very important role in preventing microbial invasion of the mucous membranes. It is related to the intense antibacterial activity. Zinc influences growth and affects the development and integrity of the immune system. Numerous studies have shown that zinc intake: Decreases the frequency of recurrent upper respiratory tract infections and their duration, reduces the frequency of diarrhea, and promotes recovery. Vitamin D3 contributes to the normal functioning of the immune system.