There is no available information or connection between creatine and hair loss. According to VeryWellHealth, "Hair loss can be caused by factors such as hormone changes, genetics, autoimmune conditions, illness, life events such as pregnancy, nutritional deficiencies, scalp conditions, and other considerations." Creatine side effects include water retention, nausea, diarrhea, dehydration, and muscle cramps. Although a 2009 study found that creatine supplements increased DHT, which can lead to hair loss, the study has not been replicated since.