# Peptide Research Glossary - facts

Canonical page: https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary
Type: Lab article

## TL;DR

A plain-language glossary of peptide research terms: reconstitution, lyophilized, concentration, U-100, bacteriostatic water, aliquot, diluent, mcg, mg, IU.

## Facts Index

| Fact ID | Category | Entity | Attribute | Value | Source | Evidence |
|---|---|---|---|---|---|---|
| peptide-glossary:title | identity | Peptide Research Glossary | title | Peptide Research Glossary | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:published | identity | Peptide Research Glossary | published | 2026-07-10 | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:author | identity | Peptide Research Glossary | author | Preppin' Peppers Editorial Team | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:topics | identity | Peptide Research Glossary | topics | Reference, research | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:summary | content | Peptide Research Glossary | summary | A plain-language glossary of peptide research terms: reconstitution, lyophilized, concentration, U-100, bacteriostatic water, aliquot, diluent, mcg, mg, IU. | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-1 | content | Peptide Research Glossary | section | What it covers | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-2 | content | Peptide Research Glossary | section | Physical Form and Preparation | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-3 | content | Peptide Research Glossary | section | Water and Storage Terms | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-4 | content | Peptide Research Glossary | section | Amount Units: mcg, mg, and IU | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-5 | content | Peptide Research Glossary | section | Concentration and Syringe Terms | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-6 | content | Peptide Research Glossary | section | Related reading | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-7 | content | Peptide Research Glossary | section | Tools and supplies | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:section-9 | content | Peptide Research Glossary | section | What the research community gets wrong about peptide research terminology | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary |
| peptide-glossary:product-gansulin-metal-peptide-pen | products | Peptide Research Glossary | references product | Gansulin Pen · Reusable Click-Dial, 3 ml (1-60 Units) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/products/gansulin-metal-peptide-pen |
| peptide-glossary:product-gansulin-3ml-cartridge | products | Peptide Research Glossary | references product | Gansulin-Compatible 3 ml Glass Cartridge for Pens (10-Pack) | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.preppinpeppers.com/products/gansulin-3ml-cartridge |
| peptide-glossary:source-www-nist-gov | source | Peptide Research Glossary | cites | NIST, Metric (SI) Prefixes , definitions of milli (10^-3) and micro (10^-6) - www.nist.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.nist.gov/pml/owm/metric-si-prefixes |
| peptide-glossary:source-pubmed-ncbi-nlm-nih-gov | source | Peptide Research Glossary | cites | Fosgerau and Hoffmann, Drug Discov Today 2015: Peptide therapeutics: current status and future directions - pubmed.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://pubmed.ncbi.nlm.nih.gov/25450771/ |
| peptide-glossary:source-pmc-ncbi-nlm-nih-gov | source | Peptide Research Glossary | cites | de la Torre and Albericio, Molecules 2020: Peptide Therapeutics 2.0 - pmc.ncbi.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://pmc.ncbi.nlm.nih.gov/articles/PMC7287585/ |
| peptide-glossary:source-www-sigmaaldrich-com | source | Peptide Research Glossary | cites | Sigma-Aldrich (Merck): Handling and Storage Guidelines for Peptides and Proteins - www.sigmaaldrich.com | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://www.sigmaaldrich.com/US/en/technical-documents/technical-article/research-and-disease-areas/cell-and-developmental-biology-research/handling-and-storage |
| peptide-glossary:source-dailymed-nlm-nih-gov | source | Peptide Research Glossary | cites | Bacteriostatic Water for Injection, USP , FDA/DailyMed label (0.9% benzyl alcohol) - dailymed.nlm.nih.gov | Lab article (https://www.preppinpeppers.com/blogs/the-lab/peptide-glossary) | https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=87d6e9dc-fe3b-4593-ac9a-d7493d1959c7 |

## FAQ

### What does lyophilized mean in peptide research?

Lyophilized means freeze-dried. Water is removed from a frozen material inside a vacuum chamber, leaving a dry powder or cake that is more stable for shipping and long-term cold storage than a liquid solution.

### What is bacteriostatic water and how is it different from sterile water?

Bacteriostatic water is sterile water containing roughly 0.9% benzyl alcohol as a preservative. The additive slows bacterial growth inside the vial, giving reconstituted solutions a longer usable window under refrigeration than plain sterile water.

### What is the difference between mg and mcg in peptide labeling?

A milligram (mg) is one thousandth of a gram. A microgram (mcg) is one thousandth of a milligram—1,000 times smaller. So 1 mg equals 1,000 mcg, and 0.5 mg equals 500 mcg.

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