Reconstitution Math — The Complete Guide
All peptide dosing math comes down to two formulas. Here they are with worked examples.
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Formula 1: Concentration
Concentration (mcg/mL) = (Vial mg × 1000) ÷ BAC water mL
Why × 1000? Because 1mg = 1,000mcg. We convert to mcg for dose precision.
Examples:
• 10mg BPC-157 + 3mL BAC = (10 × 1000) ÷ 3 = 3,333 mcg/mL
• 5mg Semaglutide + 2mL BAC = (5 × 1000) ÷ 2 = 2,500 mcg/mL
• 50mg GHK-Cu + 3mL BAC = (50 × 1000) ÷ 3 = 16,667 mcg/mL
• 1mg IGF-1 LR3 + 3mL BAC = (1 × 1000) ÷ 3 = 333 mcg/mL
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Formula 2: Dose Volume
Volume to inject (mL) = Desired dose (mcg) ÷ Concentration (mcg/mL)
Examples:
• 500mcg BPC-157 from 3,333mcg/mL: 500 ÷ 3,333 = 0.150 mL
• 250mcg Semaglutide from 2,500mcg/mL: 250 ÷ 2,500 = 0.100 mL
• 1,000mcg Tesamorelin from 5,000mcg/mL: 1,000 ÷ 5,000 = 0.200 mL
• 10mcg IGF-1 from 333mcg/mL: 10 ÷ 333 = 0.030 mL
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Formula 3: Insulin Syringe Units
A 1mL/100-unit insulin syringe: 1 unit = 0.01mL
Units to draw = Volume (mL) × 100
Examples:
• 0.150mL = 15 units
• 0.100mL = 10 units
• 0.200mL = 20 units
• 0.030mL = 3 units
Quick mental check: "units" on an insulin syringe = mL × 100
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Doses Per Vial
Doses per vial = (Vial mg × 1000) ÷ Dose mcg
Examples:
• 10mg BPC-157, 500mcg dose: (10 × 1000) ÷ 500 = 20 doses
• 5mg Semaglutide, 250mcg/week: (5 × 1000) ÷ 250 = 20 doses = 20 weeks
• 10mg Ipamorelin, 200mcg, 3x/day: (10 × 1000) ÷ 200 = 50 doses = 16 days
Questions
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