We know that type II diabetes is associated with fat gain and obesity. According to research - approximately 90% of people with type 2 diabetes are overweight or obese, so obesity is seen as a significant contributory factor in its development.
ALLAN R. GLASS, RONALD S. SWERDLOFF, GEORGE A. BRAY, WILLIAM T. DAHMS, RICHARD L. ATKINSON, Low Serum Testosterone and Sex-Hormone-Binding-Globulin in Massively Obese Men, The Journal of Clinical Endocrinology & Metabolism, Volume 45, Issue 6, 1 December 1977, Pages 1211–1219, Low Serum Testosterone and Sex-Hormone-Binding-Globulin in Massively Obese Men
We conclude that, in massively obese men, 1) serum testosterone and sex-hormone-binding-globulin are low, 2) total serum testosterone and free testosterone correlate negatively with weight but do not correlate significantly with sex-hormone-binding-globulin, 3) responses to LHRH, HCG, and clomiphene indicate substantial reproductive hormonal axis reserve, and 4) a subpopulation (2/10) of the most massively obese subjects may have a defect in the hypothalamic-pituitary axis as suggested by its low free testosterone in the absence of elevated gonadotropins or hyper-response to LRH.
IMHO, low T should be treated along with type II diabetes and weight issues. Good reason to lower our intake of hi glycemic carbohydrates along with our total intake of carbohydrates and increase our intake of protein.