It is a controlled, randomized, double-blind, parallel-group nutritional intervention study.~66 healthy elderly volunteers living in a nursing home will be randomly distributed into 2 equal groups: control group and intervention group.~For 36 weeks the volunteers will take the product immediately after lunch. During that time they will maintain their lifestyle and nutritional habits.~Every 4 weeks, the medical team of the residence will review the cases of respiratory diseases of infectious origin of the volunteers.
To analyze the efficacy of daily consumption of a combination of garlic and onion extracts on the incidence of respiratory infection symptoms in healthy elderly volunteers living in a residence.~The duration of symptoms and related medication will also be studied.