GLOSSARY

Insulin Clearance describes insulin removal from circulation.

Synthesis, storage, secretion, transport and clearance are distinct processes. Blood concentration reflects entry and removal rather than directly measuring secretion; exercise-related plasma-volume changes can also affect it. Half-life depends on hormone form and method and is not identical to the duration of all effects. Comparisons therefore need sampling time, previous food and recent activity standardized or recorded rather than interpreting isolated concentration differences without context.

Insulin is secreted by pancreatic beta cells and coordinates nutrient use and storage rather than simply being a fat-making hormone. Important effects include muscle and adipose glucose uptake, suppression of hepatic glucose production and regulation of lipolysis. Not every cell needs insulin for glucose entry. Postmeal concentrations vary with meal composition, tissue sensitivity and clearance, so one insulin excursion cannot determine overall dietary quality or an athlete's nutritional needs.

Proinsulin processing produces insulin and C-peptide. C-peptide helps assess endogenous secretion but has different clearance from insulin, so concentrations and ratios need clinical context. Early and sustained secretion phases depend on stimulus and test method. One value cannot establish total beta-cell reserve, sensitivity across every tissue or medication need. Interpretation must distinguish secretion, precursor processing and removal rather than treating their biomarkers as identical measurements.

Whole-body, liver, muscle and adipose insulin sensitivity are not one interchangeable measurement. Suppression of glucose production matters in liver, stimulation of uptake in muscle and suppression of lipolysis in adipose tissue. Resistance can differ between tissues and coexist with compensatory secretion. One fasting test without method and context cannot map the entire condition, and a postexercise change is not automatically evidence of disease or a need to eliminate carbohydrate.

Exercise mode, intensity, duration, recruited muscle, training history and prior food influence hormonal responses. Acute changes differ from baseline adaptations after training. Higher concentration does not necessarily mean greater secretion or tissue effect, because clearance, plasma volume and receptors also matter. Performance develops through combined adaptations, so targeting a hormone peak is not sufficient for session design or supplement selection; actual recovery and performance must remain part of evaluation.

Hormonal imbalance is a broad description rather than a standalone diagnosis from an online symptom list. Deficiency, excess and resistance differ, and reference ranges depend on method, age and conditions. Medicines, illness, sleep and energy status also matter. Persistent symptoms need appropriate assessment to identify causes; choosing supplements or manipulating hormones from one isolated test cannot replace evidence-based evaluation or establish a universal athletic hormone target.