You said that you had switched from 15% to 5% minoxidil? Did you notice any permanent hair loss? I just finished my 13-months' experiment with 10-15% minoxidil in my temples and I returned to Kirkland (on which I have been for many years). Unfortunately, now I have been noticing hair loss in the areas, where I applied the high % minoxidil. I am afraid that it could be permanent.