The one and only way which estrone is produced is by aromatization of androstenedione, which involves the same enzyme responsible of creation of all estrogens: aromatase. Now, estrone can be converted into more potent estradiol by 17-beta hydroxysteroid dehydrogenase enzyme, but it's another story.
How could boldenone be converted into estrone? This means EQ has to be converted into androstenedione first and then aromatizated into estrone.
I think that boldenone "simply" aromatizes into estradiol but at a lesser rate of testosterone (due to the additional double bond in the A ring of the chemical structure).
All that estrone crap may derive from false bloodworks reading, because analitic metodicals are not calibrated on "exotical" compounds (we all know that tren gives false high e2 readings).
On the other hand, there is an old aromatase inhibitor which is derivative of boldenone: ATD. ATD is a steroidal and suicidal aromatase inhibitor like aromasin and who knows if boldenone may be converted in the body into ATD. This could explain why some folks complain low e2 symptoms when running EQ, especially whit low test.
While AD is the sole
endogenous substrate for aromatase that yields E1 as product in men, Boldenone does in fact yield E1 by aromatase. Gual, C., Morato, T., Hayano, M., Gut, M., & Dorfman, R. I. (1962). Biosynthesis of Estrogens. Endocrinology, 71(6), 920–925. doi:10.1210/endo-71-6-920.
Actually, even that is not exactly true: some people endogenously produce boldenone, presumably because they possess unusual gut bacteria that possess 1,2-dehydrogenase activity to convert T, or a precursor, to the 1,2-dehydro steroid. Schänzer W. Metabolism of anabolic androgenic steroids. Clin Chem. 1996 Jul;42 (7):1001-20.
Boldenone also may be a candidate for 17β-HSD1 inhibition, resulting in reduced serum E2. Its estrogen-like A-ring possessing a C-1,2 & C-4,5 double bond may confer inhibitory potency to this enzyme given its planar shape (greater saturation, more estrogen-like) and steroidal backbone vs. DHT that is able to bind 17β-HSD1. He, W., Gauri, M., Li, T., Wang, R., & Lin, S.-X. (2016). Current knowledge of the multifunctional 17β-hydroxysteroid dehydrogenase type 1 (HSD17B1). Gene, 588(1), 54–61. doi:10.1016/j.gene.2016.04.031.
Of course, the androst-1-ene-3-ones (e.g., 1-Testosterone ["DHB" as errata]) & 5α-androstan-3-ones possessing C-1,2 double bonds (e.g., Primobolan) might be even better at this (reducing serum E2) by this hypothesis.
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