Blend vials contain multiple compounds mixed into a single solution. The ratio between those compounds — whether equal or unequal — is locked at the point of reconstitution. Understanding how ratio math works helps you read the calculator output accurately and know what each draw is actually delivering.
Why Ratios Are Fixed After Mixing
Once compounds are reconstituted together, they share a single solution. There is no way to draw more of one compound without drawing more of all others at the same proportion. The blend ratio — defined by how much of each compound went into the vial — governs every draw.
The calculator works within this fixed ratio. You set an anchor target, and all delivered amounts follow from the ratio automatically.
Equal Blend Ratios
An equal blend has compounds present in a 1:1 (or 1:1:1 for three compounds) ratio, meaning the same mass of each compound went into the vial. When concentrations are equal, each draw delivers the same amount of every compound.
Vial: BPC-157 10 mg | TB-500 10 mg
Reconstitution: 2 mL BAC water
BPC-157 concentration: 5 mg/mL
TB-500 concentration: 5 mg/mL
Anchor: BPC-157 at 500 mcg → draw volume: 0.10 mL (10 units)
Delivered TB-500: 500 mcg
Equal inputs produce equal delivered amounts at any draw volume.
Unequal Blend Ratios
An unequal blend has compounds present at different masses. Because concentrations differ, each draw delivers proportionally different amounts of each compound — even though the draw volume is the same.
Vial: BPC-157 5 mg | TB-500 10 mg | GHK-Cu 20 mg
Reconstitution: 2 mL BAC water
BPC-157 concentration: 2.5 mg/mL
TB-500 concentration: 5 mg/mL
GHK-Cu concentration: 10 mg/mL
Anchor: BPC-157 at 500 mcg → draw volume: 0.20 mL (20 units)
Delivered TB-500: 1000 mcg (1 mg)
Delivered GHK-Cu: 2000 mcg (2 mg)
TB-500 delivers 2× anchor. GHK-Cu delivers 4× anchor.
How Anchor Logic Connects to Ratio Math
The anchor compound is the reference point the calculator uses to determine draw volume. Once draw volume is set, every other compound's delivered amount is calculated from its own concentration across that same volume.
In a 1:2:4 blend, if the anchor doubles, all delivered amounts double. If the anchor halves, all delivered amounts halve. The ratio between compounds never changes — only the scale.
Why BAC Water Does Not Affect Ratios
Reconstitution volume changes the concentration of all compounds equally. More BAC water lowers all concentrations by the same factor, which increases draw volume — but the ratio between compounds remains exactly the same.
BPC-157 5 mg + TB-500 10 mg in 1 mL BAC water:
BPC-157: 5 mg/mL | TB-500: 10 mg/mL | Ratio: 1:2 — unchanged
500 mcg BPC-157 anchor → 0.10 mL draw → 1000 mcg TB-500 delivered
Same vial reconstituted in 2 mL BAC water:
BPC-157: 2.5 mg/mL | TB-500: 5 mg/mL | Ratio: 1:2 — still unchanged
500 mcg BPC-157 anchor → 0.20 mL draw → 1000 mcg TB-500 delivered
Draw volume doubled. Delivered TB-500 is identical.
Adjusting Ratios
The only way to change the ratio between compounds is to change how much of each compound goes into the vial at the time of reconstitution. Once mixed, the ratio is fixed. The calculator cannot change it — it can only calculate within it.
Quick Reference
Blend ratio is set at reconstitution and cannot be changed after mixing
Equal ratios deliver equal amounts of each compound per draw
Unequal ratios deliver proportionally different amounts per draw
Changing the anchor target scales all delivered amounts equally
BAC water affects draw size — not the ratio between compounds
Common Mistakes
All compounds are locked in ratio. Adjusting the anchor scales everything. To change the ratio, re-blend at reconstitution.
BAC water dilutes all compounds equally. Ratios are preserved regardless of reconstitution volume.
A larger draw volume means more of everything — not a different ratio. Ratio only changes if vial inputs change.
This guide is for research-use calculator education only. It does not provide medical advice, treatment recommendations, or personalized dosing instructions.