Apr 25 • General discussion
UNDERSTANDING THE MATH
🧪 Understanding mg, mcg, mL, and Units (Peptide Basics)
When working with peptides (or any compounds), you’ll see four common measurements:
1. Milligrams (mg) — Amount of substance
- What it is: A unit of mass (how much actual peptide you have)
- 1 mg = 1,000 micrograms (mcg)
👉 Think: “How much peptide is in the vial?”
Example:
- A vial labeled 10 mg GHK-Cu contains 10 mg of peptide powder
2. Micrograms (mcg) — Smaller amount of substance
- What it is: A smaller unit of mass
- 1 mcg = 0.001 mg
👉 Used when doses are very small
Example:
- A dose might be 200 mcg of BPC-157
- That’s 0.2 mg
3. Milliliters (mL) — Volume of liquid
- What it is: A unit of volume (how much liquid you add or inject)
👉 Think: “How much liquid is in the syringe or vial?”
Example:
- You add 3 mL bacteriostatic water to a peptide vial
- Now the peptide is dissolved in 3 mL of liquid
4. Units (on insulin syringes) — Measurement of volume
- What it is: A way to measure liquid using an insulin syringe
- Most peptide users use U-100 insulin syringes
👉 Key conversion:
- 100 units = 1 mL
- 10 units = 0.1 mL
- 1 unit = 0.01 mL
🔗 How They All Connect (This is the key)
Let’s walk through a real peptide example:
Example: 10 mg vial of BPC-157
Step 1: Reconstitute
- Add 2 mL of water
Now you have:
- 10 mg / 2 mL = 5 mg per mL
Step 2: Convert to mcg
- 5 mg = 5,000 mcg per mL
Step 3: Convert to “units” (insulin syringe)Since:
- 1 mL = 100 units
Then:
- 5,000 mcg ÷ 100 units = 50 mcg per unit
✅ Final result:
- 1 unit = 50 mcg
- If you want 250 mcg, you inject:5 units
🧠 Quick Reference Table
TermWhat it MeasuresSimple MeaningmgMassAmount of peptidemcgMass (smaller)Precise dosingmLVolumeLiquid amountUnitsVolume (syringe)How much you draw
⚠️ Common Beginner Mistake
People confuse:
- mg (amount of peptide)vs
- mL (amount of liquid)
👉 Adding more water (mL) does NOT increase the amount of peptide (mg)It just dilutes it
💡 Why This Matters in Peptides
- Peptides are often dosed in mcg
- Vials are labeled in mg
- You reconstitute with mL
- You inject using units
👉 So you must understand all four to dose correctly
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UNDERSTANDING THE MATH
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