Reconstitution & Vials
Fixed-Ratio Blend
Also called: peptide blend, pre-blended vial, multi-component vial
Definition
A single vial containing multiple labeled components in a set proportion to one another.
What Fixed-Ratio Blend means
When several components are already present in one vial, every liquid draw contains the same fraction of each component, assuming the vial is represented by the labeled fixed-ratio composition.
Why the distinction matters
Adding more liquid changes the concentration and draw volume, but it does not change the ratio between the components themselves.
Common confusion
A named blend does not guarantee one universal formulation. BACToBasics blend presets therefore prefill names only and require the actual vial-label masses.
See this concept in context
Open the BACToBasics tools and reference pages where this term is used.
Keep learning
Related glossary terms
Math & Measurement
Concentration
The amount of a substance contained in a given volume of liquid, such as mg/mL or mcg/mL.
Reconstitution & Vials
Reconstitution
The process of adding a liquid to a dry or lyophilized product so that it becomes a solution or suspension with a calculable concentration.
Math & Measurement
Milliliter (mL)
A metric unit of liquid volume equal to one-thousandth of a liter.
Published September 6, 2026. BACToBasics glossary pages are educational definitions only and do not provide medical, dosing, preparation, treatment, or product-selection advice.