Table 1.

General inclusion and exclusion criteria and atopic group specific inclusion criteria.

General Inclusion criteria

Volunteers of both genders aged between 18 and 64 years old

Atopic inclusion criteria

Eczema/atopic dermatitis diagnosis Rhinitis or allergic conjunctivitis diagnosis Asthma diagnosis

General Non-inclusion/Exclusion criteria

Regular consumption of kefir or any probiotic strains (as supplements or pharmaceuticals) in the three months prior to the study or during the study Oncologic disease Women who were pregnant or breastfeeding Gastrointestinal disease diagnostic affecting bowel movement (such as Irritable Bowel Syndrome or Crohn’s Disease) Retinoid treatment in the three months prior to the study or during the study Antibiotic treatment in the 30 days prior to the study or during the study Topical treatment with corticosteroids/anti-inflammatories in the study area in the eight days prior to the study or during the study Chronic illness that involves taking regular (daily) medications such as insulin, oral antidiabetics, anti-inflammatories, or immunosuppressants Skin disease in the study areas Cosmetic treatment of the skin, scrubbing, or depilation at the study areas in the 30 days prior to the study, or during the study period Failure to comply with the guidelines of the study