Last updated: 2026-06-10
Formula methodology
PepSync calculators use dimensional conversion only. They assume the vial amount, diluent volume, target dose, and syringe type entered by the user are correct, then convert those values into concentration, mL to draw, syringe units, and doses remaining.
The core formulas are: 1 mg = 1,000 mcg; concentration = total peptide divided by liquid volume; dose volume = target dose divided by concentration; syringe units = mL multiplied by the syringe scale, such as 100 for a U-100 syringe.
What the calculator does not decide
Product labels, pharmacy instructions, prescribing information, and clinician guidance should override generic educational content. PepSync cannot determine whether a product, diluent, storage window, or dose is appropriate.
The calculator also cannot verify sterility, product identity, compounding quality, storage conditions, expiration dates, individual suitability, or whether a protocol is medically appropriate.
Source categories users should check
For product-specific questions, users should confirm current product labeling, dispensing pharmacy instructions, prescriber or clinician guidance, and applicable regulatory information in their jurisdiction.
For calculator concepts, start with the reconstitution guide, unit conversion guide, and syringe units guide.
Primary references
PepSync's educational content draws on the following regulatory, pharmacopeial, and peer-reviewed references. Each citation links directly to the source.
Reconstitution and vial handling
References used for general vial handling, aseptic technique, and the limits of educational calculator guidance.
- Safe Injection Practices to Prevent Transmission of Infections to PatientsCDC · 2024
Supports cautious language around sterile needles, syringes, medication vials, and contamination prevention.
- Handling and Storage Guidelines for PeptidesBachem · 2024
Supports general peptide handling, lyophilized storage, solution stability, and moisture sensitivity context.
Bacteriostatic water and sterile water
References used for BAC water, benzyl alcohol preservative language, and diluent caution.
- Bacteriostatic Water for Injection, USPDailyMed / National Library of Medicine · 2024
Supports the description of bacteriostatic water as sterile water containing benzyl alcohol preservative.
- Bacteriostatic preserved saline for pain-free periocular injections: reviewPMC / National Library of Medicine · 2022
Provides peer-reviewed context on benzyl alcohol-preserved saline and bacteriostatic properties.
Syringe units and dose math
References used for U-100 unit conversion, medication measurement confusion, and calculator math framing.
- FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide productsFDA · 2024
Supports the importance of clear mg, mL, and unit conversion around vial-based products.
- Guidance on the Content of Premarket Notification [510(k)] Submissions for Piston SyringesFDA · 1995
Supports U-100 syringe marking context, including standard insulin syringe volumes and labeling.
- HUMALOG prescribing informationDailyMed / National Library of Medicine · 2025
Supports the definition of U-100 as 100 units/mL in a medication-label context.
Storage and beyond-use dates
References used for storage caution, beyond-use date variability, and pharmacy-label-first language.
- USP Compounding Standards beyond-use date fact sheetUSP · 2025
Supports the distinction between expiration dates and beyond-use dates for compounded preparations.
- The Pharmacist Guide to Assigning a Beyond-Use DateASHP · 2025
Supports pharmacy-led BUD assignment and conservative source-label guidance.
GLP-1 medications and vial dosing errors
FDA prescribing information and peer-reviewed trial data for the GLP-1 medications referenced in PepSync's calculator presets.
- FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide productsFDA · 2024
Supports caution around compounded injectable products, multiple-dose vials, and unit measurement errors.
- Mounjaro (tirzepatide) prescribing informationFDA · 2025
Authoritative tirzepatide dosing, titration, and storage reference.
- Ozempic (semaglutide) prescribing informationFDA · 2024
Authoritative semaglutide dosing, titration schedule, and storage reference.
- Triple-hormone-receptor agonist retatrutide for obesity — a phase 2 trialNew England Journal of Medicine · 2023
Peer-reviewed efficacy data for retatrutide; the dose ranges studied inform what is realistic to track.
BPC-157 research literature
Peer-reviewed reviews on BPC-157 cited as background for the BPC-157 calculator. PepSync does not make clinical claims; the calculator simply converts vial setup into dose volume.
- Stable gastric pentadecapeptide BPC 157 and wound healingPubMed / Frontiers in Pharmacology · 2018
Review of BPC-157 mechanisms in inflammation and tissue healing contexts.
- Brain-gut axis and pentadecapeptide BPC 157PubMed / Current Pharmaceutical Design · 2016
Reference review covering BPC-157's reported physiological effects.
TB-500 / Thymosin Beta-4 research literature
Peer-reviewed references for thymosin beta-4 (commonly sold as TB-500) cited as background for the TB-500 calculator.
- Thymosin β4 and cardiac protection: implication in inflammation and fibrosisPubMed / Annals of the New York Academy of Sciences · 2012
Reference review on thymosin beta-4 mechanisms relevant to repair contexts.
- Thymosin beta 4: a multi-functional regenerative peptidePubMed / Expert Opinion on Biological Therapy · 2012
Background review on thymosin beta-4 in wound and tissue repair.
CJC-1295 and Ipamorelin research literature
Peer-reviewed pharmacokinetic and pharmacodynamic references for the CJC-1295 and Ipamorelin compounds referenced in the calculator presets.
- Pharmacokinetic and pharmacodynamic studies with CJC-1295, a long-acting growth hormone releasing peptidePubMed / Journal of Clinical Endocrinology & Metabolism · 2006
Foundational pharmacokinetic data for CJC-1295.
- Ipamorelin, the first selective growth hormone secretagoguePubMed / European Journal of Endocrinology · 2001
Background reference on ipamorelin as a selective GHRH secretagogue.
Safety and regulatory notes
References used for unapproved peptide caution and safety notes on compounds discussed in calculator examples.
- Changes of melanocytic lesions induced by Melanotan injections and sun bed use in a teenage patient with FAMMM syndromePubMed · 2013
Supports cautious wording around melanocytic lesion changes reported after Melanotan 2 use in a case report.
- Melanotan Tanning Injection: A Rare Cause of PriapismPMC / National Library of Medicine · 2021
Supports cautious wording that adverse event reports exist for melanotan II use.
Editorial and review policy
PepSync pages are written to explain calculator mechanics and reduce unit-conversion mistakes. Content is reviewed for internal consistency, clear educational boundaries, and alignment with the formulas shown on this page.
We prioritize updates when calculator behavior changes, when a common search query reveals unclear wording, or when user feedback identifies an error in a worked example.
Correction process
If you spot an error, outdated explanation, or unclear wording, send the page URL, the specific sentence or calculation, and the reason it appears incorrect through the contact page.
Calculation errors are checked against the formula methodology above. If a page is corrected, the page updated date is refreshed and the surrounding example is reviewed for related mistakes.
Useful starting pages
The most important public calculator pages are the peptide reconstitution calculator, peptide dose calculator, and peptide concentration calculator. Dedicated peptide pages, such as semaglutide, tirzepatide, and BPC-157, apply the same formula structure to common peptide-specific examples.