This is not an easy problem as it is not clear whether your baby is allergic to milk or is lactose intolerant. Both of these conditions would improve on a soya formula. Your baby cannot continue on a soya formula as she is struggling with constipation. Try her on a low allergy formula first such as NAN HA. If she becomes windy again and colicky then change her to a lactose free formula such as NAN LF.
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