Hormone Health Hub: Expert Insights on Testing, Balance & Better Living — Fasting Insulin

By Dr. Allison Smith, ZRT Laboratory Sex Hormone Binding Globulin (SHBG) is one of the most overlooked variables in hormone health. It directly controls how much testosterone is biologically active in your body — yet it rarely appears on standard blood panels. Whether you're dealing with symptoms of low testosterone, androgen excess, or unexplained hormonal imbalance, understanding SHBG is essential to getting the full picture. What is SHBG? SHBG is a protein produced primarily in the liver that binds tightly to testosterone — and to a lesser degree, oestradiol (E2) and dihydrotestosterone (DHT) — and carries them through the bloodstream....

Low libido in perimenopause is rarely just one thing — it’s a mosaic of hormonal, physical and lifestyle factors. From falling oestrogen and DHEA to thyroid dysfunction and metabolic syndrome, discover what’s really driving the loss of desire and how hormone testing can help.