it's not hard to tell at all. I had relatively slow hair loss, about 60% density before taking it and ZERO scalp inflammation at 33 years old. I took it and over 10 months, I lost literally half of my hair, down to 30% (people have seen pics), and my scalp became inflammed to the point where I couldn't even sleep. I had burning, itching, crawling, and I still have it to this day. Started two months after taking it, and never stopped. If you need MORE evidence - my hair loss is the worst now in the places I had / have this inflammation. The crown, midscalp, front. So, that's a coincidence? The moment I start taking this shit ALL OF THIS ^ happens to me. not hard to call at all.