Can Lactulose cause hair loss?

You need to ask these questions to your doctor and explore why you are losing hair. Anorexia itself may also be a cause of hair loss. 

Lactulose doesn't usually cause hair loss. However the deficiencies (protein vitamin and mineral) associated with anorexia certainly can.  There are 100 reasons for hair loss. For an individual with anorexia, the hair loss may be related to anorexia or might not be related to anorexia. Only with a detailed medical history, carefully examination of the scalp and blood tests can one figure out if a person's anorexia is related to their hair loss or not. It may or may not be.