The hormones that are most commonly associated with hair loss are the androgens (DHEA, testosterone, and DHT) and thyroid (hypothyroidism). There are others that are equally important, like cortisol, and another is prolactin, which rarely gets the attention it deserves.
While we understand the desire for a label or “official” diagnosis, it makes me scratch my head (no pun intended) that providers offer scalp biopsies because while they claim that they’ll help to determine an “accurate diagnosis,” they rarely change their treatment plan based on the results.
The FDA just approved the sixth iteration of JAK (Janus kinase) inhibitors for alopecia. But just because it’s newly approved doesn’t mean it’s great because none of the JAK inhibitors are great. In fact, the FDA has also issued a black box warning.