One study found that there was an increase in dihydrotestosterone levels after supplementing with creatine, which is a hormone associated with hair loss and male pattern baldness.
That said, a review study published in 2021 analyzed 12 studies on the relationship between creatine and hair loss, and found “the current body of evidence does not indicate that creatine supplementation increases total testosterone, free testosterone, DHT or causes hair loss/baldness.”[1]
In other words, the current body of scientific evidence shows that taking creatine won’t cause or accelerate hair loss.
1 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7871530/