My hair started feeling weak again out of sudden since early January, and I am now worried if I did more harm than good with the Estriol. The main problem is that I feel it weak again, as I said, and they are more thinner towards the root and they break more easily. I still cannot understand why so sudden, and I can't know because there are times that they will feel great and times that they will feel so bad. I am so confused. It doesn't make any sense, especially from Estrogens. Then, why this increment to my DHT levels as well? (Despite of being serum and even if it does not play the same role as scalp DHT, is still worrying) I read that DHT increases to compensate for the higher Estrogen levels. If so, then the systemic absorption of Estriol and the increment lead to an increment to scalp DHT as well? I cannot understand how Estrogens can work in a vice versa state and promote upside-down results since plenty of threads here sharing great success stories. As long as I used it, my shedding went down a bit but this, is not a clear assumption because I was completing my Finasteride 1 year, so I can't truly know. Generally, I didn't notice something odd until early January and after. I believe that something else is going on. Thank you very much for your time.