Insulin

Types commonly used in bodybuilding:

• Rapid-acting (Humalog/NovoRapid/Fiasp): Onset 10-15 min, peak 1-2h, duration 3-5h
• Regular (Humulin-R): Onset 30 min, peak 2-3h, duration 5-8h
• Long-acting (Lantus/Levemir): For advanced users only — flat profile over 20-24h

Dosage:

• Beginner (rapid-acting post-workout): 5 IU with 50-75g fast carbs + 40g protein
• Intermediate: 5-10 IU post-workout, titrated based on glucose response
• Advanced: 10-15+ IU with meals, often combined with GH

Administration:

• SubQ injection, abdomen or love handles
• Insulin syringe (100 IU/mL)
• ALWAYS have fast-acting carbs immediately available (glucose tablets, juice, dextrose)

Key Notes:

• MOST DANGEROUS compound in bodybuilding — hypoglycaemia can cause seizures, coma, and death
• Rule of 10: consume at least 10g carbs per 1 IU of rapid-acting insulin
• NEVER use insulin without a glucose meter — check blood glucose before, during, and after
• NEVER use insulin alone — always with food/carbs
• NEVER use insulin and go to sleep during its active window
• NEVER start with long-acting insulin — rapid-acting only, so mistakes resolve within hours
• Synergistic with GH: GH causes insulin resistance, insulin counteracts it while both promote anabolism
• Chronic use causes insulin resistance and can lead to type 2 diabetes
• Monitor: fasting glucose, HbA1c, fasting insulin, C-peptide — before, during, and after use
• Signs of hypoglycaemia: shakiness, sweating, confusion, dizziness, rapid heartbeat — eat carbs IMMEDIATELY