Galactosemia vs. Lactose Intolerance

There are many similarities between these two disorders. However, it is important that we realize the difference between galactosemia and lactose intolerance. While both of them involve a negative reaction to milk, galactosemia is much more severe. Galactosemia can cause a deadly buildup of galactose in the body when milk is consumed, whereas lactose intolerance can only cause vomiting or indigestion. And, although both conditions are hereditary, galactosemia is a much more rare defect, and lactose intolerance is much more common. So, while both disorders are similar, galactosemia is much more rare and dangerous to those afflicted.