Testosterone Supplement Caused Massive Hair Loss Within 4 Days

I’ve been taking propecia and using Rogaine for 8 months now with great results. Recently, I purchased and started to take a natural testosterone supplement. Within 4 days I witnessed an enormous amount of hair loss. I immediately stopped taking the product and since then my hair has stopped falling out. Will the hair I lost every come back? Will I recover from this stupid mistake?

While in theory what you describe is conceivable, it seems very strange a supplement can cause such rapid (in 4 days) hair loss — even if it was a testosterone supplement. I really do not have an opinion on whether your hair will grow back, since I really don’t know what caused your hair loss. You may consider seeing your doctor for his/her opinion and an in-person examination.