16 biomarkers impacting weight gain and loss: Insulin Glucose Hemoglobin A1C (HbA1c) Thyroid Stimulating Hormone (TSH) Triiodothyronine (T3) Free Thyroxine (T4) Free Thyroglobulin Antibodies (TgAb) Thyroid Peroxidase Antibodies (TPO) Leptin Cortisol High-Sensitivity C-Reactive Protein (hs-CRP) Triglycerides Apolipoprotein B (ApoB) Vitamin D Magnesium Iron Many of these lab tests are often overlooked during routine check-ups, but advanced testing can expose these invisible issues. If you’re not s