Do all v2 pens use the same increment?

No. Many brands' v2 pens set the volume on a dial that clicks, and their per-click volume varies by manufacturer and model. Our V2 peptide pen is draw-and-push instead: its scale reads in 0.01 ml (1-unit) steps up to 60 units per draw. Always confirm your specific pen's increment rather than assuming it matches another brand's v2.

What is dead volume and why does it matter for reconstitution math?

Dead volume is the liquid trapped in the cartridge and needle hub that never dispenses. It varies by needle gauge, so measure it with plain water for your exact setup before relying on concentration calculations.

Can I lubricate the threads on a metal peptide pen?

A thin film of pen-safe lubricant on dry threads prevents metal-on-metal galling from over-tightening, a common failure mode on all-metal pen bodies.

PreppinPeppers › Facts › Lab article

Why your v2 peptide pen still wastes real vial volume

Machine-readable facts for this Lab article. The full page is https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume.

TL;DR

V2 peptide pen: why a draw-and-push pen still wastes vial volume, from dead volume and cartridge fit to the diluent and storage habits that matter most.

Facts Index

Fact ID	Category	Entity	Attribute	Value	Source
why-v2-peptide-pen-still-wastes-real-vial-volume:title	identity	Why your v2 peptide pen still wastes real vial volume	title	Why your v2 peptide pen still wastes real vial volume	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:published	identity	Why your v2 peptide pen still wastes real vial volume	published	2026-08-15	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:author	identity	Why your v2 peptide pen still wastes real vial volume	author	Preppin' Peppers Editorial Team	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:topics	identity	Why your v2 peptide pen still wastes real vial volume	topics	peptide pen, reconstitution, research, v2 reusable peptide pen	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:summary	content	Why your v2 peptide pen still wastes real vial volume	summary	V2 peptide pen: why a draw-and-push pen still wastes vial volume, from dead volume and cartridge fit to the diluent and storage habits that matter most.	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-1	content	Why your v2 peptide pen still wastes real vial volume	section	What it is	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-2	content	Why your v2 peptide pen still wastes real vial volume	section	What "v2" actually fixes	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-3	content	Why your v2 peptide pen still wastes real vial volume	section	Metal vs plastic: the trade-off that matters at the bench	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-4	content	Why your v2 peptide pen still wastes real vial volume	section	Dead volume: the hidden vial-waster	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-5	content	Why your v2 peptide pen still wastes real vial volume	section	Draw accuracy and where it drifts	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-6	content	Why your v2 peptide pen still wastes real vial volume	section	Diluent and storage habits that keep the pen honest	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-8	content	Why your v2 peptide pen still wastes real vial volume	section	Related reading	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:section-9	content	Why your v2 peptide pen still wastes real vial volume	section	What the research community gets wrong about the v2 reusable peptide pen	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:product-gansulin-metal-peptide-pen	products	Why your v2 peptide pen still wastes real vial volume	references product	Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units)	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:product-gansulin-3ml-cartridge	products	Why your v2 peptide pen still wastes real vial volume	references product	Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack)	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:source-pubmed-ncbi-nlm-nih-gov	source	Why your v2 peptide pen still wastes real vial volume	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/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:source-pubmed-ncbi-nlm-nih-gov-2	source	Why your v2 peptide pen still wastes real vial volume	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/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:source-pmc-ncbi-nlm-nih-gov	source	Why your v2 peptide pen still wastes real vial volume	cites	Lingen et al., Endocr Connect 2023: Advantages and disadvantages of connected insulin pens in diabetes management - pmc.ncbi.nlm.nih.gov	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:source-dailymed-nlm-nih-gov	source	Why your v2 peptide pen still wastes real vial volume	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/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)
why-v2-peptide-pen-still-wastes-real-vial-volume:source-www-sigmaaldrich-com	source	Why your v2 peptide pen still wastes real vial volume	cites	Sigma-Aldrich (Merck): Handling and Storage Guidelines for Peptides and Proteins - www.sigmaaldrich.com	Lab article (https://www.preppinpeppers.com/blogs/the-lab/why-v2-peptide-pen-still-wastes-real-vial-volume) (evidence)

FAQ

Do all v2 pens use the same increment?: No. Many brands' v2 pens set the volume on a dial that clicks, and their per-click volume varies by manufacturer and model. Our V2 peptide pen is draw-and-push instead: its scale reads in 0.01 ml (1-unit) steps up to 60 units per draw. Always confirm your specific pen's increment rather than assuming it matches another brand's v2.
What is dead volume and why does it matter for reconstitution math?: Dead volume is the liquid trapped in the cartridge and needle hub that never dispenses. It varies by needle gauge, so measure it with plain water for your exact setup before relying on concentration calculations.
Can I lubricate the threads on a metal peptide pen?: A thin film of pen-safe lubricant on dry threads prevents metal-on-metal galling from over-tightening, a common failure mode on all-metal pen bodies.