The purpose of this study is to evaluate the impact of a new Amino-acid based formula on allergic symptoms and growth of infants with cow's milk protein allergy and intolerant to extensively hydrolysed formulas;

Inclusion Criteria:

• less than 18 months old
• with a proven cow's milk protein allergy by a double blind placebo controlled food challenge or a positive Skin prick test (>=6mm) or specific immunoglobulin E >= 5 kilo-unit/L or combination
• still symptomatic while fed an extensively hydrolysed formula

Exclusion Criteria:

• Exclusively breast fed infants
• non allergic digestive enteropathy