I've read this on a few forums also I found a study stating insulin drop shbg levels dramatically.Is that one of the main reasons why insulin has such a dramatic impact when combined with testosterone & other aas?I know the other major benefits of insulin but this aspect of insulin isn't talked about much online or in general.The relationship between serum levels of insulin and sex hormone-binding globulin in men: the effect of weight loss. - PubMed - NCBI
