The Lab

Preppin Peppers' research library. Reconstitution guides, a growing peptide reference database, and bench-ready calculators, all in one place. For research and educational reference only.

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Peptide Reconstitution Math: Step-by-Step With Worked ExamplesBest Peptide Reconstitution Calculator: 5 Tools ComparedBest Reusable Pens for Research Reconstitution: The Gansulin Metal PenHow to Buy Genuine Bacteriostatic Water: A Verification GuideHow a precision click-dial pen works: reading the unit counter window and the click3 ml glass cartridges explained: the 300-unit standard, seals and storage
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Best Reusable Peptide Pen RedditDead volume is stealing doses from your peptide penPeptide Reconstitution Math: Step-by-Step With Worked ExamplesRetatrutide: Reference Overview and Reconstitution NotesWhat ruins your peptide during the vial-to-cartridge transferAdamax: Reference Overview and Reconstitution Notes
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Reusable Auto-Injector Pens vs. Click-Dial Pens: What Actually Matters on the BenchWhy a Cardiac Surgery Peptide Trial Matters at Your BenchAmber vs Clear Glass Cartridges: When Light Protection MattersWhy your GLP-1 peptide degrades before your assay doesWhy your protein condensates age into amyloid faster thanWhy your GLP-1 vials degrade faster than the data suggestsThe insulin mix-up that could ruin your peptide mathWhat actually makes a peptide vial risky in your research

The Lab

A glass vial of freeze-dried lyophilized powder
What Is a Peptide?

A plain-language reference explaining what a peptide is, how peptide bonds link amino acids, and how peptides are distinguished from proteins by chain length. Read more...
A glass vial of freeze-dried lyophilized powder
U-100 vs U-40 Syringes: What the Numbers Mean

A reference explainer covering what the U-100 and U-40 scales mean, the units-per-milliliter behind each, and why reading the wrong scale produces measuring errors. Read more...
Tirzepatide research image
Tirzepatide: Reference Overview and Reconstitution Notes

Tirzepatide is a synthetic dual GIP and GLP-1 receptor agonist peptide grouped under metabolic and weight-regulation research, and it is FDA-approved for specific indications. Read more...
TB-500 research image
TB-500: Reference Overview and Reconstitution Notes

TB-500 is a synthetic acetylated heptapeptide fragment of thymosin beta-4, grouped with healing and tissue-repair research peptides, and is a research-only compound that is not FDA-approved. Read more...
Survodutide research image
Survodutide: Reference Overview and Reconstitution Notes

Survodutide is an investigational glucagon receptor and GLP-1 receptor dual agonist peptide studied in the metabolic and weight-regulation category, and it is not FDA approved. Read more...
A glass vial of freeze-dried lyophilized powder
Sterile Technique for Handling Vials

A plain-language reference on aseptic handling of laboratory vials, covering clean work surfaces, wiping stoppers with alcohol, single-use swabs, and avoiding contact with the stopper or needle. Read more...
SS-31 research image
SS-31 (Elamipretide): Reference Overview and Reconstitution Notes

SS-31 (elamipretide) is a mitochondria-targeting tetrapeptide grouped with cellular energy and mitochondrial-function research compounds, now FDA-approved for one rare indication (Barth syndrome) while remaining investigational for all other uses. Read more...
A glass vial of freeze-dried lyophilized powder
Signs a Reconstituted Vial Has Gone Bad

A reference guide to the visual and physical cues, such as cloudiness, color change, and particulates, that indicate a reconstituted research vial should be set aside. Read more...
Semaglutide research image
Semaglutide: Reference Overview and Reconstitution Notes

Semaglutide is a GLP-1 receptor agonist peptide grouped under metabolic and weight-regulation research, and it is FDA-approved for specific indications including type 2 diabetes and chronic weight management. Read more...
Retatrutide research image
Retatrutide: Reference Overview and Reconstitution Notes

Retatrutide is a synthetic single-molecule triple agonist peptide (GIP, GLP-1, and glucagon receptors) studied in the metabolic and weight-regulation category, and it is investigational and not FDA-approved. Read more...
PT-141 research image
PT-141 (Bremelanotide): Reference Overview and Reconstitution Notes

PT-141 (bremelanotide) is a synthetic melanocortin receptor agonist peptide grouped with reproductive and sexual-health compounds, and it holds a narrow FDA approval for one specific indication. Read more...
Reconstitution supplies with the green Gansulin pen
Storage Guide: Fridge, Freezer, and Light

A plain-language reference on how lyophilized and reconstituted research peptides are stored across refrigerator and freezer temperatures, with notes on light exposure and freeze-thaw handling. Read more...
A glass vial of freeze-dried lyophilized powder
Peptide Research Glossary

A plain-language glossary defining common peptide research terms, including reconstitution, lyophilized, concentration, U-100, bacteriostatic water, aliquot, diluent, and the units mcg, mg, and IU. Read more...
MOTS-c research image
MOTS-c: Reference Overview and Reconstitution Notes

MOTS-c is a 16-amino-acid mitochondrial-derived peptide grouped with metabolic and mitochondrial-function research compounds, not FDA-approved for any indication and prohibited under the WADA Prohibited List as an AMPK activator. Read more...
MK-677 research image
MK-677 (Ibutamoren): Reference Overview and Reconstitution Notes

MK-677 (Ibutamoren) is a non-peptide, orally active small molecule in the growth-hormone secretagogue / ghrelin-mimetic class, studied within metabolic and growth-hormone-axis research, and it is not FDA-approved (research-only). Read more...
Ipamorelin research image
Ipamorelin: Reference Overview and Reconstitution Notes

Ipamorelin is a synthetic pentapeptide growth hormone secretagogue (a ghrelin receptor agonist) that is not FDA-approved for any indication and is prohibited in sport under the WADA Prohibited List. Read more...
Reconstitution supplies with the green Gansulin pen
Insulin Syringe Sizes and Gauges Explained

A plain-language reference to insulin syringe barrel volumes, needle gauge and length, and what the U-100 marking means. Read more...
Reconstitution supplies with the green Gansulin pen
How Reconstitution Works: Turning a Freeze-Dried Vial Into a Measured Solution

What reconstitution is, the simple math behind concentration and draw volume, and the handling steps that keep a solution clean and accurate. Read more...
GHK-Cu research image
GHK-Cu: Reference Overview and Reconstitution Notes

GHK-Cu is a copper-bound tripeptide (copper-peptide family) grouped in the healing, tissue-repair and skin research category, and it is research-only and not FDA-approved for any injectable indication. Read more...
CJC-1295 research image
CJC-1295: Reference Overview and Reconstitution Notes

CJC-1295 is a synthetic long-acting analog of growth-hormone-releasing hormone (GHRH), grouped as a growth-hormone secretagogue, that is not FDA-approved and is sold only as a research-use-only laboratory chemical. Read more...
Cagrilintide research image
Cagrilintide: Reference Overview and Reconstitution Notes

Cagrilintide is a long-acting amylin analog peptide grouped under metabolic and weight-regulation research, and it is investigational and not FDA-approved for any indication. Read more...
BPC-157 research image
BPC-157: Reference Overview and Reconstitution Notes

BPC-157 is a synthetic 15-amino-acid peptide grouped with healing and tissue-repair research compounds, and it is research-only and not approved by any drug regulatory agency for human use. Read more...
Units, milliliters and milligrams: reading a U-100 scale
Units, milliliters and milligrams: reading a U-100 scale

What a U-100 unit is, how it relates to milliliters, and how concentration turns units into milligrams, with a worked example and a free calculator. Read more...
How to load a cartridge pen
How to load a cartridge pen

A step-by-step walkthrough of seating a 3 ml cartridge in a reusable pen, attaching a needle, and priming out air, using the Gansulin metal pen as the example. Read more...