GLP-1 (S) Semiglutide 20mg
$150.00
- Free US shipping over $150
- HPLC-tested at 99%+ purity
- US-based fulfillment
Overview
Semaglutide
Semaglutide is a GLP-1–based peptide studied for its role in appetite regulation and metabolic signaling. It works by slowing gastric emptying and influencing satiety pathways, which may help reduce cravings and support improved blood sugar control. Many individuals incorporate GLP-1–based compounds into structured wellness programs focused on metabolic efficiency and body composition support. Commonly referenced for appetite control and weight management research applications.
Scientific Overview
Semaglutide is a glucagon-like peptide-1 (GLP-1) receptor agonist studied for its interaction with metabolic pathways related to insulin signaling, appetite regulation, and glycemic control. GLP-1 receptor activation has been explored in research settings for its potential effects on satiety hormones, gastric motility, and energy balance. Ongoing research continues to evaluate GLP-1–based compounds for their role in metabolic optimization and adiposity-related pathways.
Product Details
• Compound: Semaglutide (GLP-1 receptor agonist)
• Vial Size: 5mg
• Purity: ≥99%
Legal & Research Disclaimer
This product is intended strictly for laboratory research purposes only. It is not approved for human or veterinary use by the FDA or any other regulatory agency. Store in a cool, dry environment prior to reconstitution and handle using appropriate laboratory and aseptic techniques.
Frequently asked questions
Yes. Every batch of GLP-1 (S) Semiglutide 20mg undergoes independent third-party testing using High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS). The Certificate of Analysis is published and accessible from the product page.
GLP-1 (S) Semiglutide 20mg sold by MHS Longevity is verified to 99%+ purity, with the result documented in each batch's Certificate of Analysis. Anything below that threshold is rejected before release.
The Certificate of Analysis for GLP-1 (S) Semiglutide 20mg is available directly from the product page and on our Third-Party Test Results page. Each COA includes the batch identifier, test date, testing method, and verified purity percentage.
GLP-1 (S) Semiglutide 20mg ships from our US-based facility with standard or expedited options. Orders over $150 qualify for free standard US shipping. All orders are packaged discreetly with documented handling protocols.
No. GLP-1 (S) Semiglutide 20mg is supplied strictly for laboratory research purposes only. It is not approved by the FDA for human or veterinary use, and it is not intended to diagnose, treat, cure, or prevent any disease.
MHS Longevity is a veteran-owned operation focused on pharmaceutical-grade research compounds. We source from vetted manufacturers, batch-test independently with HPLC and Mass Spectrometry, and publish every Certificate of Analysis. Pricing is transparent and the testing process is documented end-to-end.
Semaglutide has a molecular weight of approximately 4113.6 g/mol. The empirical formula and exact monoisotopic mass are documented on each batch's Certificate of Analysis alongside the Mass Spectrometry result confirming the lipid modification was correctly incorporated.
FDA-approved pharmaceutical preparations of semaglutide are formulated solutions produced under pharmaceutical-manufacturing standards and distributed through prescription channels for human therapeutic use. Research-grade Semaglutide is a lyophilized peptide supplied for laboratory study only — it is not formulated, not pharmaceutical-grade, and not approved for human use. The molecule itself is the same active species; the regulatory status, formulation, and intended use are entirely different.
Semaglutide is sent to an independent third-party laboratory for HPLC and Mass Spectrometry analysis before each batch is released. The lab's identifier and test date are published on the Certificate of Analysis for that batch.
Semaglutide is a single-agonist at the GLP-1 receptor. Tirzepatide is a dual-agonist active at both the GLP-1 receptor and the GIP (glucose-dependent insulinotropic polypeptide) receptor. They are structurally distinct peptides with different amino-acid sequences and different receptor-binding profiles in the published research literature. We stock both as separately tested compounds.
Research & buying
The evidence behind GLP-1 (S) Semiglutide 20mg and the questions to ask any vendor before you order.
Research details — GLP-1 (S) Semiglutide 20mg
Semaglutide is a synthetic peptide analogue of glucagon-like peptide-1 (GLP-1), engineered for extended in-vivo stability through two amino-acid substitutions and a covalently attached fatty-acid side chain. It is one of the most-cited compounds in modern incretin-biology research. The form supplied here is for laboratory research only — it is not the same product as any FDA-approved pharmaceutical preparation, and nothing in this guide constitutes guidance for human use.
What is Semaglutide?
Semaglutide is a 31-amino-acid peptide structurally based on native GLP-1(7-37). It differs from native GLP-1 at two residues — an aminoisobutyric-acid substitution at position 8 to resist DPP-4 cleavage, and a lysine substitution at position 26 to which an 18-carbon di-acid fatty acid is attached via a γ-glutamic-acid / OEG-OEG spacer. The fatty-acid tail enables non-covalent binding to serum albumin in physiological systems, extending the molecule's half-life relative to native GLP-1. It is supplied as a lyophilized off-white powder for laboratory reconstitution.
Research context
Published research on semaglutide spans incretin-receptor pharmacology, glucose homeostasis models, gastric-emptying studies, and a substantial body of cardiometabolic-disease investigation. The molecule's mechanism centers on agonism at the GLP-1 receptor — a class-B G-protein-coupled receptor expressed in pancreatic beta cells, certain central-nervous-system neurons, and gastric tissues. Researchers should evaluate primary sources directly and consider that much of the published clinical-trial literature describes specific pharmaceutical formulations, which differ from research-grade lyophilized peptide.
How Semaglutide quality is verified
Semaglutide is structurally complex — it contains non-standard residues, a fatty-acid modification, and spacer chemistry — which makes high-quality analytical verification especially important. Every batch of MHS Longevity Semaglutide is submitted to an independent third-party laboratory before release:
- HPLC separates components by chemistry. Semaglutide's elution profile is distinctive due to the lipid modification; impurity peaks corresponding to des-fatty-acid forms or truncated synthesis products are flagged in the chromatogram. Anything below 99% target compound is rejected.
- Mass Spectrometry is critical for confirming that the lipid side chain and spacer were correctly incorporated. The expected mass shifts associated with the fatty-acid / OEG-OEG / γ-Glu architecture are documented for each batch.
What a Semaglutide Certificate of Analysis shows
- Compound name and structural designation. Semaglutide, with full sequence notation including the lipid modification and spacer architecture.
- Batch identifier. The unique ID linking certificate to vial.
- Test date. When the analysis was performed.
- Method. HPLC, MS, or both, with column and mobile-phase notes.
- Verified purity %. The HPLC result. We require 99%+.
- Lab and signatures. The independent lab performing the analysis.
Storage and handling (research lab context)
Lyophilized Semaglutide should be stored at -20°C or below for extended stability. Once reconstituted in bacteriostatic water, the solution is typically held at 2–8°C and used within the documented stability window. Repeated freeze–thaw cycles should be avoided. The lipid-modified architecture is sensitive to extreme pH and to repeated thermal cycling, so single-use aliquoting is good practice. Standard aseptic technique applies during reconstitution.
Where to buy GLP-1 (S) Semiglutide 20mg
The same eight questions apply whether you're buying GLP-1 (S) Semiglutide 20mgfrom us or anywhere else. Vendors who can't answer any of them are worth a closer look.
Vendor evaluation checklist
1. Is the Certificate of Analysis public and downloadable?
A vendor unwilling to publish HPLC/MS results for the batch you're buying has nothing to verify their purity claim against.
2. Which testing method was used — HPLC, Mass Spectrometry, or both?
HPLC measures purity. Mass Spectrometry confirms the molecule's identity. Reputable batches go through both.
3. What's the verified purity percentage on the published COA?
Industry research standard is 99%+. Below that, you're paying for a compound diluted with synthesis byproducts.
4. Where does the product ship from?
US-based fulfillment generally means shorter handling times, customs-free delivery, and clearer return remedies.
5. Is the price published at a single list rate, or hidden behind tier locks?
Opaque pricing is a yellow flag. Transparent vendors quote the same number to every customer.
6. What's the free-shipping threshold, if any?
Compare the all-in cost (product + shipping + handling) — not just the headline price.
7. How is the product stored prior to shipment?
Lyophilized peptides degrade with temperature swings. Vendors should disclose temperature-controlled storage.
8. Is there a documented damage-claim and return policy?
Discreet shipping carries handling risk. A clear, written policy protects you when something goes wrong.
MHS LongevityThis site - Price
- $150
- Purity
- 99%+
- Testing
- HPLC + MS
- COA public
- US-based
- Free shipping
- $150+
- Last checked
- May 13, 2026
| Vendor | Price | Listed purity | Testing method | COA public | US-based | Free shipping | Last checked |
|---|---|---|---|---|---|---|---|
MHS LongevityThis site | $150 | 99%+ | HPLC + MS | $150+ | May 13, 2026 |
Competitor data sourced from each vendor's public product page on the date shown. Listed purity reflects each vendor's own published claim; Certificate of Analysis availability is verified at the URL above. Data may have changed since last check.