Aromatase is an enzyme that is responsible for biosynthesis of estrogens from androgens; subsequently, aromatase inhibitors suppress the biosynthesis of androgens into estrogens.
Helping your body's androgens ( Testosterone ) to maintain ( maintenance ) their natural levels.
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Also, cruciferous plants are good sources of vitamins and minerals that appear to positively affect testosterone levels; for instance, Vitamin K and A and zinc.
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[1] https://en.wikipedia.org/wiki/Cruciferous_vegetables
For a list of cruciferous plants.
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[2] https://en.wikipedia.org/wiki/Testosterone#Regulation
> Nutrients: Vitamin A deficiency may lead to sub-optimal plasma testosterone levels. The secosteroid vitamin D in levels of 4001000 IU/d (1025 µg/d) raises testosterone levels. Zinc deficiency lowers testosterone levels but over-supplementation has no effect on serum testosterone. [2]
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[3] http://www.whfoods.com/genpage.php?tname=foodspice&dbid=9
> A third area of increasing research interest involves the metabolism of vitamin D. Broccoli is not a source of this vitamin, but it is an excellent source of vitamin K and also of vitamin A (in one of its precursor forms, beta-carotene). Many individuals have large vitamin D deficiencies that cannot be remedied through diet alone, and these deficiencies require sizable amounts of vitamin D to be provided through dietary supplementation. When large supplemental doses of vitamin D are needed to offset deficiency, ample supplies of vitamin K and vitamin A appear to help keep our vitamin D metabolism in the proper balance.[3]
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[7] https://en.wikipedia.org/wiki/Aromatase
> In particular, aromatase is responsible for the aromatization of androgens into estrogens.[7]
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[5] https://en.wikipedia.org/wiki/Androgen
> Testosterone, the major androgen.
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[6] https://en.wikipedia.org/wiki/Estrogen
> All of the different forms of estrogen are synthesized from androgens, specifically testosterone and androstenedione, by the enzyme aromatase. [6]
> Quantitatively, estrogens circulate at lower levels than androgens in both men and women. [6]
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[7] https://www.ncbi.nlm.nih.gov/pubmed/23090135
> The aim of this study was to evaluate the effect of white cabbage and sauerkraut juices of different origin and indole-3-carbinol (I3C) and diindolylmethane (DIM) on expression of CYP19 gene encoding aromatase, the key enzyme of estrogen synthesis. [7]
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[8] https://www.ncbi.nlm.nih.gov/pubmed/26840393
> indole-3-carbinol and diindolylmethane. These compounds occur as glucosinolate conjugates in cruciferous vegetables and are released when one chews or otherwise macerates the vegetable.
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[9] https://www.ncbi.nlm.nih.gov/pubmed/19524224
But of course this is nutritional science so there is lots of conflicting and grounding counter research.[9]
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My take away from all of this is that having a varied diet is the most important.
I said 'cruciferous plants' to actively avoid listing a single item as a cure all.
Also, my guess is that our diets have narrowed as we have stopped seasonally cooking for ourselves and buy processed foods with a lot of ingredient overlap likely confusing our bodies which were designed to function on the ingredients found in the varied foods we ate.