There are number of disease states that can increase blood levels of SHBG and therefore lower free T levels.
1.Testicular cancer,
2.Breast cancer, fibrocystic breast disease,
3.Elevated estradiol levels,
4.Elevated thyroid levels,
5.Aging,
6.Extreme weight loss as in anorexia nervosa.
7.Pregnancy,
8.Estrogen containing birth control pills,
9.Diets low in protein. In elderly men ages 40 to 70 years. Increased SHBG leads to lower FT and increased risk for fragility, low bone density, fractures, anemia, decreased sexual function etc. [J Clin Endocrinol Metab. 2000 Jan; 85 (1) 293-6]
10.Certain meds such as the Dilantin (a phentyoin) drug class, which can produce increased activity of the enzyme for SHBG synthesis.
11.Liver chirrosis (fibrosis) occurs from scar tissue in the liver , usually formed from excess alcohol abuse or maybe other drugs or chemicals over time. Liver chirrosis is associated with increased SHBG,
12.Cigarettes smoking leads to increased SHBG,
13.Any compromise of liver detoxification such as alcohol abuse, certain meds, heavy metals etc can decrease liver capacity to excrete excess estrogens from the body,
14.Any estrogen use, maybe even the plant estrogens (phytoetrogens) can increase SHBG,
15.Increased conversion T to E (aromatization).
https://www.excelmale.com/forum/sho...adiol-and-Sex-Hormone-Binding-Globulin-in-Men