Considered a rare disorder affecting both genders , it first becomes apparent during childhood with displays of language delay and behavioural symptoms.Main aim : To show whether the combination of @ mg/kg/day of ascorbic acid ( vitamin C ) and @ mg/kg/day of - tocopherol ( vitamin E ) reduces FXS symptoms among male patients ages @ to @ years compared to placebo treatment , as measured on the standardized rating scales at baseline , and after @ and @ weeks of treatment.Secondary aims : To assess the safety of the treatment .