Lactobacillus Reuteri Supplementation in the Treatment of Infantile Colic

Inclusion Criteria: 1. Exclusively breastfed Infants 2. Infant aged of 29 days to 3 months 3. With a diagnosis of infantile colic as defined by the Rome III criteria 4. Birth at term and eutrophic (weight, height, head circumference) 5. Apgar score\> 7 at 5 minutes 6. Consent to the study signed by the two parents. 7. Availability during the study period Exclusion Criteria: 1. Associated severe chronic disease 2. Acute infectious disease 3. Personal or family first degree history of allergy to milk proteins 4. Several infants of the same family from a multiple pregnancy 5. Infants who received antibiotics one week prior to randomization 6. Infants who received probiotics one week prior to randomization 7. Mother who received antibiotics 1 week before randomization 8. Regular consumption of probiotics by the mother 1 week before randomization 9. Infants-included in another clinical study 10. Lack of insurance coverage by the french social security 11. Non exclusively breastfed infants