Intervention Study to Evaluate a Probiotic in Mild Atopic Dermatitis Young Patients

Inclusion Criteria: * patients that are 4 to 17 years of age. * Patients diagnosed of atopic dermatitis according to Hanifin and Rajka diagnostic criteria for atopic dermatitis. * Patients with a SCORAD score ranging from 20 to 40. * Patients that are actually using, or in which the use of topic corticosteroids to treat the atopic dermatitis flare-ups. * Patients whose parents or legal representative have signed the informed consent. If the patient is 12 year old or older, the patient has to sign a consent to enter the trial. Exclusion Criteria: * Pregnancy. * Breastfeeding. * Women of childbearing age that do not make a commitment to use any effective contraceptive method. * Phototherapy treatments to atopic dermatitis * Systemic corticoid therapy in the last two months. * Immunosuppressive or cytostatic treatment in the last two months. * Probiotic treatment in the last two months. * Systemic antibiotic in the last four months. * Fever (axillary temperature \> 37ºC or equivalent) * Severe allergic diseases- * Immunodeficiency or cancer related processes. * Other dermatological pathologies that could difficult the atopic dermatitis evaluation, or that require the continued use of topic corticosteroids. * Any contraindication to any product or drug used during the trial, according to their technical files. * Participation in any drug clinical trial in the last 3 months.