# Your Peptide Pen’s Dead Volume Is Costing You Real Money - facts

Canonical page: https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money
Type: Lab article

## TL;DR

A reusable aluminium-alloy pen body holds a 3 ml glass cartridge and meters by draw-and-push. Here's how dead volume in your pen setup costs you real money.

## Facts Index

| Fact ID | Category | Entity | Attribute | Value | Source | Evidence |
|---|---|---|---|---|---|---|
| your-peptide-pens-dead-volume-is-costing-you-real-money:title | identity | Your Peptide Pen’s Dead Volume Is Costing You Real Money | title | Your Peptide Pen’s Dead Volume Is Costing You Real Money | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:published | identity | Your Peptide Pen’s Dead Volume Is Costing You Real Money | published | 2026-08-15 | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:author | identity | Your Peptide Pen’s Dead Volume Is Costing You Real Money | author | Preppin' Peppers Editorial Team | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:topics | identity | Your Peptide Pen’s Dead Volume Is Costing You Real Money | topics | peptide pen, reconstitution, research, v3 peptide pen | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:summary | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | summary | A reusable aluminium-alloy pen body holds a 3 ml glass cartridge and meters by draw-and-push. Here's how dead volume in your pen setup costs you real money. | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-1 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | What it is | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-2 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | Why a Metal Body Beats Plastic for a Reconstitution Pen | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-3 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | Glass Cartridge Tolerances and the Dead Volume Problem | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-4 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | Draw-and-Push Metering: Where Most of Your Accuracy Lives or Dies | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-5 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | Diluent Choice Directly Affects Your Pen's Performance | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-6 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | Making the V3 Part of a Repeatable Bench Routine | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:section-8 | content | Your Peptide Pen’s Dead Volume Is Costing You Real Money | section | What the research community gets wrong about peptide reconstitution pens and dead volume | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money |
| your-peptide-pens-dead-volume-is-costing-you-real-money:product-gansulin-metal-peptide-pen | products | Your Peptide Pen’s Dead Volume Is Costing You Real Money | references product | Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/products/gansulin-metal-peptide-pen |
| your-peptide-pens-dead-volume-is-costing-you-real-money:product-gansulin-3ml-cartridge | products | Your Peptide Pen’s Dead Volume Is Costing You Real Money | references product | Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://www.preppinpeppers.com/products/gansulin-3ml-cartridge |
| your-peptide-pens-dead-volume-is-costing-you-real-money:source-pubmed-ncbi-nlm-nih-gov | source | Your Peptide Pen’s Dead Volume Is Costing You Real Money | cites | Bohannon, Postgrad Med 1999: Insulin delivery using pen devices. Simple-to-use tools may help young and old alike - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://pubmed.ncbi.nlm.nih.gov/10560468/ |
| your-peptide-pens-dead-volume-is-costing-you-real-money:source-pubmed-ncbi-nlm-nih-gov-2 | source | Your Peptide Pen’s Dead Volume Is Costing You Real Money | cites | Chaves et al., Rev Esc Enferm USP 2017: Residual volume in vials of antibiotics used in pediatrics - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://pubmed.ncbi.nlm.nih.gov/28614439/ |
| your-peptide-pens-dead-volume-is-costing-you-real-money:source-dailymed-nlm-nih-gov | source | Your Peptide Pen’s Dead Volume Is Costing You Real Money | cites | Bacteriostatic Water for Injection, USP: FDA label on DailyMed, U.S. National Library of Medicine (0.9% benzyl alcohol) - dailymed.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/your-peptide-pens-dead-volume-is-costing-you-real-money) | https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=87d6e9dc-fe3b-4593-ac9a-d7493d1959c7 |

## FAQ

### What is dead volume in a peptide pen cartridge?

Dead volume is the small amount of liquid trapped in the cartridge tip and internal channel that cannot be expelled. In 3 ml glass cartridges it ranges from 0.06 to 0.15 ml depending on cartridge geometry and diluent viscosity.

### How do I verify my v3 pen's metering accuracy?

Fill a cartridge with bacteriostatic water, draw 0.50 ml (50 units; the V3 sets up to 60 units, 0.60 ml, per draw), push it into a graduated cylinder, and read the volume. Repeat ten times. A well-calibrated v3 peptide pen should hold within 0.02 ml of the target across all trials.

### Can I use any diluent with the v3 peptide pen?

Bacteriostatic water works best for consistent flow and dead volume. More viscous diluents like acetic acid solutions slightly increase dead volume. Avoid salt-containing buffers unless required, as salt crystals can scratch the glass bore.

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