Prospective Study to Determine the Factors Influencing Infant Colic

Inclusion Criteria: * Healthy infants from 2 to 12 weeks of age * Infants diagnosed with infant colic following Roma IV criteria for clinical research * Gestational age greater or equal to 37 weeks * Birth weight greater than 2100 g * Exclusively breastfed or formula fed with a maximum of one daily intake of breast milk. Exclusion Criteria: * Infants that are fed with solid food. * Infants whose parents can not appropriately follow the requirements of the study. * Antibiotics or probiotics administration to the infant (including infant formula with probiotics) 2 weeks prior the inclusion in the study. * Breastfed infants whose mothers have taken antibiotics and/or probiotics 2 weeks prior the inclusion in the study. * Infants fed extensively hydrolyzed infant formula * Specific medication use for the treatment of functional digestive disorder: antacids (IBP type or H2 blockers), laxative Polyethylene glycol (8PEG), lactulose, magnesia), lactase or simeticone. * Infants going through therapies related with acupuncture, homeopathy, medicinal herbs, or taking anti-inflammatory or antispasmodic drugs.