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Sex hormone-binding globulin (SHBG) or sex steroid-binding globulin (SSBG) is a glycoprotein that binds to androgens and estrogens. When produced by the Sertoli cells in the seminiferous tubules of the testis , it is called androgen-binding protein ( ABP ).
In a meta-analysis, high-dose vitamin D supplements given to women with vitamin D deficiency due to PCOS improved glucose levels, insulin sensitivity, and cholesterol levels, as well as lowering testosterone, sex hormone-binding globulin, and the free androgen index, all of which are associated with hyperandrogenism. [68]
[49] [50] Hormone levels are similar to those of males, including high testosterone levels and relatively low estradiol levels. [49] [50] However, luteinizing hormone (LH) levels are elevated while sex hormone-binding globulin (SHBG) levels are more consistent with those of females.
"Physicians should be looking at other labs including free T, sex hormone binding globulin, or SHBG, and several other biomarkers," says Simpson, especially for veterans in the gray area.
Sex hormone-binding globulin levels were mildly elevated (6.0–10.0 nmol/L), while thyroxine-binding globulin, corticosteroid-binding globulin, and prolactin levels were all normal. [7] Osteocalcin and bone-specific alkaline phosphatase levels were both substantially elevated (18.7–21.6 ng/mL and 33.3–35.9 ng/mL, respectively). [7]
Free Androgen Index (FAI) is a ratio used to determine abnormal androgen status in humans. The ratio is the total testosterone level divided by the sex hormone binding globulin (SHBG) level, and then multiplying by a constant, usually 100.
Emerging research [53] is showing that hormonal contraception methods like oral contraceptive pills (which rely on estrogen and progesterone together) are causing low libido in females by elevating levels of sex hormone-binding globulin (SHBG). SHBG binds to sex hormones, including testosterone, rendering them unavailable.
Estradiol benzoate (EB), sold under the brand name Progynon-B among others, is an estrogen medication which is used in hormone therapy for menopausal symptoms and low estrogen levels in women, in hormone therapy for transgender women, and in the treatment of gynecological disorders. [8] [12] [13] It is also used in the treatment of prostate ...