Galactosemia is a lifelong condition that children will not outgrow. However, galactosemia can be easily managed by following a galactose-free diet. Galactose is derived from the complex sugar, lactose, so any food containing lactose (milk and milk products) should be avoided as well. The majority of fruits, vegetables, grains, breads, fats, and sugars are safe to eat as long as they contain little or no galactose.