I’m taking Letrozole and have experienced some shedding but I’ve had far worse hair loss before cancer due to a blood condition, and found the Viviscal supplement helped but don’t know if it can be taken with medication. I’ve also taken Sun Chlorella A in the past and continue to do so now as I’ve been told by a pharmacist it’s safe to take. Did show it to my Oncologist, hadn’t heard of it but after reading the box, said it was okay! I found hair loss soul destroying and went to see dermatologists who specialised in hair loss and the trichologist Philip Kingsley, he was very good and said one of the most important things anyone can do for their hair is to eat some protein at breakfast to feed the hair. Lucinda Elleray is also worth looking into if things get bad, not cheap but her hair pieces and clip ins are excellent. I have a friend who lost a lot of hair after having too many extensions, she wears one of their hair clip ins every day and you would never know. Hope this helps x