Glucose Metabolism Blood Markers
Glucose metabolism markers assess blood sugar regulation and insulin sensitivity. Growth hormone use significantly increases insulin resistance, and some bodybuilders use exogenous insulin (extremely dangerous). HbA1c provides a 3-month average of blood sugar control, while fasting glucose and insulin levels reveal acute metabolic status. GLP-1 agonists are increasingly used for managing GH-induced insulin resistance.
Glucose Metabolism Markers (5)
Glucose
Fasting Glucose
Blood sugar level. Elevated levels indicate diabetes risk.
PED: GH use can elevate fasting glucose and potentially cause insulin resistance. Important to monitor on GH, especially at higher doses. High carb diets can affect non-fasting values.
HbA1c
Glycated Haemoglobin
Average blood sugar over 2-3 months. Best marker for long-term glucose control.
PED: GH use can worsen HbA1c over time, indicating insulin resistance. More reliable than single glucose readings as it reflects 2-3 months average. High haematocrit from AAS can affect accuracy of some HbA1c assays. Target <5.5% for optimal metabolic health.
HbA1c (IFCC)
Glycated Haemoglobin (IFCC)
IFCC-standardised HbA1c measurement. Same marker as HbA1c % but in SI units. Normal: <42 mmol/mol. Pre-diabetes: 42-47. Diabetes: >=48. Conversion: mmol/mol = (% - 2.15) x 10.929.
PED: Equivalent to HbA1c % — same clinical significance. GH use can worsen HbA1c over time, indicating insulin resistance. High haematocrit from AAS can affect accuracy of some HbA1c assays. Australian labs report both units; mmol/mol is the IFCC standard.
Insulin
Fasting Insulin
Hormone that controls blood sugar. High levels indicate insulin resistance.
PED: GH use increases insulin resistance, requiring more insulin to control blood sugar. Some athletes use exogenous insulin (extremely dangerous -- can cause fatal hypoglycaemia). Low fasting insulin with normal glucose is optimal and indicates good insulin sensitivity.
HOMA-IR
Homeostatic Model Assessment of Insulin Resistance
Calculated index of insulin resistance derived from fasting glucose and fasting insulin. Lower values indicate better insulin sensitivity. The most practical tool for detecting early GH/peptide-induced metabolic dysfunction.
PED: Auto-calculated when both Fasting Glucose and Fasting Insulin are present in a blood test. Formula: (Glucose mmol/L x Insulin mIU/L) / 22.5. Lean, muscular athletes typically have lower baseline HOMA-IR (0.5-1.0) than sedentary adults. This means even 'normal' values (1.5-2.0) can represent a meaningful shift on GH or MK-677. Track the trend, not just the absolute number. A HOMA-IR that doubles from 0.8 to 1.6 over a GH cycle is a stronger signal than a single reading of 1.6 in isolation. GH, MK-677, and other GH-releasing peptides are the primary drivers of HOMA-IR elevation in this population. The index catches insulin resistance weeks before fasting glucose alone would flag a problem.
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Compounds That Affect Glucose Metabolism
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