Creatine Supplements May Increase DHT Levels And Possibly Hair Loss

College-aged rugby players taking creatine monohydrate supplementation for three weeks had their Testosterone and DHT measured. The results of these tests indicated a rise in DHT levels when using this supplement in their diet. A rise in DHT levels can accelerate, at least in theory, the hair loss seen in genetically balding patients.

https://www.ncbi.nlm.nih.gov/m/pubmed/19741313/