Quote from: AshleyP on July 26, 2017, 04:28:48 PMKay - I really don't have much of an understanding of CYP enzymes yet. In fact, first I'd heard of it. I'll look into it and ask my doctor. I've only ever taken E orally (though sometimes sublingually), and the only thing that I have to go on is lab results that show both T and E to be in the "desired" range.
"Desired" range means nothing. It's an arbitrary range set by endocrinologists who forgot to take into account that we are not ciswomen, that our history is very different (puberty, in-utero hormonal environment, etc.) and that every individual is UNIQUE. Besides, ciswomen's range varies widely, from as little as 20 pg/ml to up to 700+ and lab results are a number that is measured at a random time, nothing more so that at time Y, you can be in the "desired" range and at time X, you may NOT be. In transwomen, there has never been a level shown to produce optimal results, ever.
In recent studies, they even admit:
European Journal of Endocrinology (2008) 159 197–202"There are
no evidence-based recommendations for optimal hormonal treatment regimens for transsexuals, but there are a number of expert opinions in the literature (1–4)."
Lancet Diabetes Endocrinol. 2017 Apr;5(4):291-300."The precise concentration of oestradiol that results in adequate feminisation with the lowest risk of complications is not known.28"
Ann Endocrinol (Paris). 2016 Feb;77(1):14-21."There is currently no international recommendation for the optimal choice of the drugs, dosages and routes of administration."
We just don't know. But, we persist in aiming for a "desired" range as if we knew.

As regards to T levels, you need to also realize that spironolactone not only reduces T levels but ALSO BLOCKS T. So, blood test results are misleading because they don't tell you how much of what is measured is blocked by spiro.
If we were more rational, I think, it would make more sense to actually try and find the dose that is optimal for the INDIVIDUAL, starting with a low dose and then adjust according to how they are feeling and what kind of results they are seeing (i.e. breast growth, fat distribution, etc.)
Quote from: Dena on July 26, 2017, 06:48:34 PM
Lets see, 27 ng/dl testosterone and 103 pg/ml estradiol, it's a girl! Those numbers are golden and you should be feeling the full effects of feminine HRT.
I respectfully disagree. Some women may not respond effectively to these levels (or even respond to 'worse' levels), it depends. At double that level, measured 15 hours after my last dose, I had no breast growth, no nothing. My levels needed to be triple that for breasts to finally begin growing. Everyone is different, sensitivity varies and tests do not measure sensitivity, AFAIK.
Also, I bet she would have quite different levels at 1, 2, 4, 8 and 24 hours post dose. So, really, that number is one of many almost infinite numbers during a 29 hour range. Not very accurate, if you ask me.