Stimulants + Stress = Hair loss, is this true?

I've been experimenting with stimulants to give me a little oompf when I need it. The latest was Adderall (XR 20mg) while the assist impacted me in a great uptick in productivity, I started seeing hair thinning on my hairline above my forehead. Could be coincidence but then again, I'm not old. You could say young adults would lose hair coincidentally, but my family happens to be hairy and I for one can count as a mild 6-7.5/10 hairy. In either way, I wanted to see if my theory is correct, for those who take alternative nootropics, do you see any effects like hair loss or hair thinning? I've decided to take Biotin for example, 10,000 mcg per night or three nights a week seems to make me feel a bit better, I get those extra Vit. C. when I need it.