The statement contains some inaccuracies. Firstly, milk sugars (lactose) are not converted into fiber in the gut. Fiber is a type of carbohydrate found in plant-based foods, and lactose is a sugar specific to dairy products. The digestion of lactose primarily occurs in the small intestine with the help of the enzyme lactase.

Secondly, while goat milk does contain lactose, it does not naturally contain significant amounts of vitamin C. Vitamin C is more commonly associated with fruits and vegetables. Goat milk does provide various nutrients, including calcium and protein, but it's not considered a significant source of vitamin C.