MG vs Units Explained
One of the most common questions in peptide research is how milligrams (mg) relate to units on a syringe. The confusion comes from the fact that “units” do not represent a fixed amount of peptide. Instead, units depend entirely on how the peptide is mixed.
Once you understand this, dosing becomes much easier.
What Does MG Mean?
MG (milligrams) refers to the total amount of peptide in the vial before mixing.
For example:
A 10mg vial contains 10 milligrams of peptide total.
This number does not change, no matter how much water is added.
What Are Units?
Units are the markings on an insulin syringe.
100 units = 1ml
50 units = 0.5ml
10 units = 0.1ml
Units measure liquid volume, not peptide strength.
Why Units Change Strength
The strength of each unit depends on how much water is added during reconstitution.
Example:
10mg vial + 2ml water:
10 units = 0.5mg (500mcg)
10mg vial + 1ml water:
10 units = 1mg (1000mcg)
Same vial, different strength per unit.
Simple Rule to Remember
More water = weaker per unit
Less water = stronger per unit
This is why consistent mixing is critical.
Quick Comparison
10mg vial:
With 2ml water:
10 units = 500mcg
With 1ml water:
10 units = 1mg
Peptides That Follow This Rule
This applies to most peptides including:
BPC-157
TB-500
GHK-Cu
CJC-1295 DAC
The math stays the same across compounds.
Common Mistakes
Thinking units = strength
Not tracking how much water was added
Changing mixing ratios
Guessing doses
Final Thoughts
Understanding the relationship between mg and units removes confusion and allows for consistent dosing. The key is knowing your total mg and how much liquid was added.