There is not a clear answer for this question. However, I do think that SD can cause severe hair loss if left untreated. I know you may be thinking, "why don't people with SD get antifungal treatments like Ketoconazole (Nizoral) to get rid of SD and save their hairs then?!" Sadly, the problem with SD is not the symptom, but the root cause. Why do you have SD in the first place? It's just like acne or eczema. Why do these conditions occur? This is a billion dollar question. All sorts of reasons like genetics, gut health, heavy metal toxicity, adrenal fatigue, diet, and lifestyle are out there, but genetics seems to be the most logical answer so far. I know that is not the answer we want, but we can at least try other "theories" to see if they help with SD or not.