Tesamorelin 20

This guide explains how to identify and verify a Tesamorelin 20 pen before research use, how to convert a target quantity into clicks using Veyvora’s 2026 reference values, and how to reconcile the arithmetic discrepancy between the stated per-click figure and the nominal label quantity.

Using Tesamorelin 20 for laboratory research requires four steps: confirm the batch number against the certificate of analysis (CoA), verify the pen delivers 67 µg per click across 300 clicks, calculate the click count for your reference amount, and keep the material within an in-vitro research workflow [1].

How to use Tesamorelin 20 for in-vitro laboratory research:

1. Confirm the batch number printed on the pen matches the batch number on the CoA before any research use.
2. Verify the pen specification: Tesamorelin 20 is a 3 mL, 300-click format delivering 67 µg per click [1].
3. Calculate the click count for your reference amount using the 67 µg-per-click figure (see the conversion table in the dosing section below).
4. Reconcile the arithmetic total (67 µg × 300 clicks = 20.1 mg) against the labelled nominal quantity and the CoA-reported measured quantity.
5. Store and handle the pen according to the cold-chain conditions confirmed at the time of dispatch [1].
6. Record all batch details, click calculations and storage conditions in your laboratory documentation before recording any results.

Tesamorelin 20 pen specification (2026 reference values) [1]

Tesamorelin is a synthetic growth hormone-releasing hormone (GHRH) analogue used as a research peptide in in-vitro laboratory research. Veyvora’s Tesamorelin 20 pen lists 67 µg per click and 300 clicks per pen as its 2026 reference values [1]. Every figure in this guide is a reference value derived from Veyvora’s documented product information; the pen is supplied for in-vitro research, not for human or veterinary use.

To use Tesamorelin 20 in laboratory research, confirm the research-use designation in your protocol first, then match the batch number to the CoA, inspect the packaging and gel pack on arrival, convert your reference amount into clicks using the 67 µg-per-click figure from Veyvora’s 2026 product documentation, and record all batch details before logging any result [1].

Research-use workflow, Tesamorelin 20 (2026):

1. Confirm the research-use designation. Check that your protocol designates Tesamorelin 20 as a research reagent before the pen is opened [1].
2. Match the product and batch number. Check that the batch number printed on the pen barrel matches the batch number on the CoA; results are recorded against the matching CoA [1].
3. Inspect the packaging and gel pack. On receipt, check that the insulated bag and gel ice pack are intact and that the parcel still feels cold before disturbing the carton. Veyvora ships cold in an insulated bag with a gel ice pack; a warm parcel or compromised packaging warrants setting the batch aside and notifying the supplier before use [1].
4. Convert the reference amount into clicks without premature rounding. Using Veyvora’s stated 67 µg per click, divide your target quantity in micrograms by 67 to obtain the exact click count before rounding to the nearest whole click [1]. For the mechanism behind the 67 µg figure, see Tesamorelin: the GHRH analogue explained.
5. Record batch details, handling conditions and protocol version. Log the batch number, CoA reference, storage temperature, click calculation and protocol version number in your laboratory documentation before recording any experimental result [1].

For guidance on how the high-performance liquid chromatography (HPLC) purity figure on the CoA is measured and reported, see how HPLC purity is measured.

Veyvora’s 2026 Tesamorelin 20 reference card lists three amounts alongside their corresponding click counts: 1 mg at 15 clicks, 1.5 mg at 23 clicks, and 2 mg at 30 clicks [1]. Each figure is a reference value for in-vitro laboratory research.

Reference Schedule Table

The table below reproduces the card’s displayed values, shows the arithmetic result at 67 µg per click, and flags where rounding means the calculated amount differs from the nominal label figure.

Reconcile these arithmetic conversions of Veyvora’s 2026 reference values with the current batch documentation before recording results [1].

Why the Click Counts Are Rounded

The 1 mg row is the most precise: 1,000 µg ÷ 67 µg = 14.93 clicks, which rounds to 15. The 1.5 mg row shows the largest nominal gap: 1,500 µg ÷ 67 µg = 22.39 clicks, rounded up to 23, producing 1,541 µg rather than exactly 1,500 µg, a 2.7% overshoot relative to the nominal label figure. The 2 mg row gives 2,000 µg ÷ 67 µg = 29.85 clicks, rounded to 30, yielding 2,010 µg.

These differences arise because 67 µg does not divide evenly into round milligram amounts. The printed card presents the nearest whole-click approximation; the arithmetic result is what the pen actually delivers at that click count, assuming the per-click volume is consistent across the barrel.

Precedence Rule

The printed dosing card and the current batch CoA take precedence over any figure reproduced here. Where the card supplied with a specific pen states a different per-click value, recalculate every row using that figure before logging results. For definitions of terms such as assay purity and endotoxin that appear on the CoA, the research peptide glossary provides batch-documentation context. Tesamorelin 20 sits within Veyvora’s Growth & Recovery research pens catalogue category, where batch documentation for the current stock is listed alongside the product.

Verify the Tesamorelin 20 batch against its CoA before any material enters an in-vitro laboratory research workflow. Complete the following steps in order, recording each outcome in your research log:

1. Photograph the unopened carton, capturing the printed batch number, expiry date and any tamper-evident seal.
2. Record the batch number from the carton label in your research log before opening.
3. Download or request the batch-specific CoA from Veyvora; the batch-matched document is the one to hold [2].
4. Confirm the product name on the CoA reads “Tesamorelin 20” and that the batch number matches the carton exactly; a single-character mismatch is grounds to pause and contact the supplier [2].
5. Inspect the mass spectrometry identity result: this test confirms the molecular identity of the peptide by matching the measured mass to the expected value for tesamorelin; purity and concentration are reported by the HPLC and content lines [2].
6. Review the HPLC assay result: Veyvora states a threshold of at least 98.0% assay purity for its 2026 batches, tested first by Asterion Analytics and then again by Veyvora’s own internal testing [1]. HPLC reports composition and purity; identity is confirmed by mass spectrometry, and long-term stability by a stability study [2].
7. Review the endotoxin assay result: this test addresses endotoxin contamination and reports the assay method, the result and the applicable limit, alongside the identity and purity tests [2].
8. Check the synthesis-partner traceability field on the CoA. Veyvora operates as a reseller; the CoA identifies the manufacturing synthesis partner separately, confirming the chain of custody from production to dispatch [1].
9. Log any mismatch between batch numbers, test results and stated thresholds, or missing fields, before using the material, and resolve mismatches with the supplier before proceeding.

What Each Test Reports

Veyvora’s 2026 quality-control process uses HPLC, mass spectrometry and endotoxin assay, conducted first by Asterion Analytics and then again by Veyvora’s own internal testing [1]. These three tests address different questions: HPLC assesses purity and peak profile; mass spectrometry confirms molecular identity; endotoxin assay screens for contamination. Potency retention after transit and long-term shelf-life are determined by a validated stability study.

For the detailed batch-number matching procedure that this guide summarises, see Veyvora’s verify a batch against its CoA page. For handling guidance after the receiving check, see research-peptide storage and stability.

The arithmetic is straightforward: 67 µg × 300 clicks = 20,100 µg, which equals 20.1 mg [1]. That 0.1 mg excess over the nominal “20” in the product name is small, and auditable research records account for it. Before logging any reference amount, reconcile three sources, the current batch label, the printed dosing card and the CoA, to confirm which figure governs.

Why the Numbers Diverge

Three distinct mechanisms can produce a gap between a displayed per-click figure and a nominal label quantity:

1. Rounding in the displayed click output. The true per-click delivery may be, say, 66.7 µg, with the card rounding to 67 µg; that rounding inflates the apparent total by approximately 0.1 mg across 300 clicks.
2. Nominal versus net fill. A 20 mg label may describe nominal content; the actual fill volume may be slightly higher to account for dead volume in the pen mechanism, meaning the usable delivered amount differs from both the label and the click-arithmetic total.
3. Batch-to-batch variation within specification. A CoA reporting a measured quantity above or below the nominal label value may fall within the supplier’s stated acceptance range. The Veyvora batch-specific CoA states which figure applies to a given pen.

The batch documentation settles which of these applies [1].

Three-Way Reconciliation Checklist

Run this check before recording any reference amount against a batch:

1. Read the batch label on the pen: note the stated nominal quantity in mg.
2. Read the printed dosing card: confirm the per-click figure (67 µg as of 2026 [1]) and the total click count (300 clicks [1]).
3. Multiply: 67 µg × 300 = 20,100 µg = 20.1 mg, record this as the arithmetic implied total; the CoA reports the net content.
4. Compare the arithmetic total against the CoA net-content result for that batch number.
5. Where the three figures align within the CoA’s stated tolerance, document the reconciliation and proceed.
6. Where any figure conflicts, contact the supplier before use and log the discrepancy.

Note: The CoA is the primary quality record; a product-page number is a reference convenience, and the batch CoA carries the batch-specific measurement [1].

At 67 µg per click, 300 clicks imply 20.1 mg, a 2026 arithmetic conversion of Veyvora’s stated reference values; net content is reported on the CoA [1]. For a fuller explanation of how the HPLC purity result on a CoA is read, see how HPLC purity is measured.

Researchers based in South Africa can order Tesamorelin 20 directly through Veyvora, which dispatches to the UK, Germany, Czechia, Spain, Portugal and South Africa as of 2026 [1].

Ordering Details

Before First Use

Veyvora’s documented quality-control process reconciles the batch number printed on the pen against the CoA before in-vitro work begins. Confirm the HPLC purity result, mass-spectrometry identity confirmation and endotoxin value are all present on the batch-specific document [2].

Unfamiliar with terms such as HPLC purity, endotoxin assay or lyophilised material? The research peptide glossary defines each in the context of laboratory reagent handling.

Verify your batch against its CoA before recording any result; that single step is the audit trail for the in-vitro record.