Wholesale Predosed Pens
Retatrutide & Klotho — Dial-a-Dose Format for Clinics, Distributors & Private Label Buyers
SARMs-Direct supplies wholesale predosed research pens in Retatrutide and Klotho formats — prefilled delivery devices with a dial-a-dose mechanism designed for precision, repeatability, and ease of use in clinical and research settings. The pen format removes the need for manual vial reconstitution, syringes, and preparation steps, making it increasingly the preferred format for clinic supply, wellness programmes, and multi-site research operations.
Both compounds are available for B2B wholesale, private label, and white label supply. All pens are GMP-certified, independently tested, and supplied with full batch documentation and COA.
What Are Predosed Research Pens?
A predosed research pen is a prefilled, single-compound delivery device — similar in concept to insulin pens used in clinical settings. Each pen contains a sterile solution at a defined concentration, with a dial mechanism that allows the user to set and deliver a precise dose without the need for separate syringes, needles, or reconstitution equipment.
- Prefilled with sterile compound solution at a preset concentration
- Dial-a-dose mechanism — precise, repeatable dosing across study cohorts
- No vials, syringes, or manual reconstitution required
- Reduces handling steps and contamination risk
- Consistent dosing across multiple users or sites
- Discreet, professional design suitable for clinic and research environments
The pen format is particularly well-suited to clinic supply, wellness brand retail, and multi-site research programmes where consistency, ease of use, and professional presentation are important.
Available Pen Compounds
Retatrutide (LY3437943) Pens
Triple GLP-1/GIP/Glucagon agonist. Retatrutide pens are prefilled with sterile Retatrutide solution and are designed for weekly subcutaneous administration in research settings. The pen format eliminates the manual preparation steps associated with lyophilised powder reconstitution, reducing operational complexity for multi-site research programmes and clinic-based supply.
- Prefilled sterile Retatrutide solution
- Dial-a-dose mechanism for flexible dosing
- Cold-chain shipping included
- COA and full batch documentation per order
- Research use only
Klotho Pens
Longevity-associated protein. Klotho pens are prefilled with sterile Klotho solution and are designed for clinic supply, wellness brand retail, and longevity research programmes. Their dial-a-dose format makes them particularly well-suited to anti-ageing clinics and wellness businesses supplying clients with structured compound protocols.
- Prefilled sterile Klotho solution
- Dial-a-dose mechanism for precision and consistency
- Refrigerated storage required — temperature-controlled shipping available
- COA and full batch documentation per order
- Private label and white label options available
Why Choose the Pen Format for Wholesale Supply?
| Predosed Pen | Vial + Syringe | |
|---|---|---|
| Preparation required | None — prefilled and ready to use | Reconstitution, drawing, measuring |
| Dosing accuracy | High — dial mechanism | Variable — user-dependent |
| Contamination risk | Low — sealed, minimal handling | Higher — multiple handling steps |
| Equipment needed | None additional | Syringes, needles, BAC water |
| Multi-site consistency | High — standardised per pen | Lower — operator variability |
| Client / end-user experience | Professional, discreet | Clinical, more complex |
| White label potential | High — branded pen design | Moderate — label on vial only |
Who Orders Wholesale Pens
- Clinics & anti-ageing practices — predosed pens for structured client protocols
- Wellness brands — private label pen products for longevity and metabolic health programmes
- Distributors — pen format supply for regional clinic and retail networks
- E-commerce operators — branded pen products for direct-to-consumer wellness brands
- Research institutions — standardised dosing across multi-site cohort studies
- Private label buyers — custom branded pen products for longevity and metabolic health lines
See our Industries We Serve page for full B2B client detail.
Supply Options
Wholesale (unbranded)
Pens supplied in standard research-grade packaging with batch labelling, COA, and research-use documentation. Suitable for distributors, research institutions, and clinic supply.
Private Label
Your branding applied to the pen and outer packaging. Available subject to minimum order quantities. Contact us to discuss your design requirements and lead times.
White Label
Fully custom pen design, label, and packaging built around your brand identity. Available for established buyers with ongoing volume requirements. Contact us to discuss.
Custom Dose Configurations
Pen concentration and dose range can be configured to your research or commercial requirements. Contact us with your target dose, volume, and quantity for a tailored quotation.
Quality & Documentation
- GMP-certified manufacturing
- ISO quality management system
- HACCP-compliant production controls
- Sterile fill under controlled conditions
- Independent third-party testing — HPLC, MS, ICP-MS
- Certificate of Analysis (COA) per batch
- Batch and lot traceability records
- Research Use Only labelling and export documentation included
- Temperature-controlled shipping available
See our Lab Testing & QA page for full methodology detail.
Shipping & Storage
Pen shipments are dispatched in protective packaging with temperature control where required. Both Retatrutide and Klotho pens require refrigerated storage (2–8°C) and are shipped with temperature-controlled logistics to maintain compound integrity in transit.
We ship to EU, UK, USA, Canada, Australia, and other international markets. Full customs documentation, COA, and research-use labelling are included with every shipment. See our Shipping & Logistics page for full country-by-country detail.
Frequently Asked Questions
What are predosed research pens?
Prefilled delivery devices containing a sterile compound solution with a dial-a-dose mechanism. They eliminate manual reconstitution, syringes, and preparation steps — reducing handling time, contamination risk, and dosing variability in clinical and research settings.
Which compounds are available as wholesale pens?
Currently Retatrutide (LY3437943) and Klotho. Contact us for additional compounds and custom pen configurations.
What is the minimum order quantity for wholesale pens?
MOQ varies by compound and configuration. Contact us with your required compound, dose concentration, and target quantity for a tailored quotation.
Do you offer private label or white label predosed pens?
Yes. Private label and white label options are available for both Retatrutide and Klotho pens. Contact us to discuss branding, packaging, and volume requirements.
How are predosed pens shipped?
In protective packaging with temperature-controlled logistics. Both Retatrutide and Klotho pens require refrigerated shipping. Full customs documentation and research-use labelling are included.
Do predosed pens come with Certificates of Analysis?
Yes. A COA from an independent, accredited laboratory is included with every pen batch. Full batch documentation and lot traceability records are available on request.
Related Products
- Retatrutide (LY3437943) — full product page including lyophilised powder supply
- Klotho — full product page including vial supply and private label options
- Orforglipron (LY3502970) — oral GLP-1 agonist, complementary metabolic research compound
For peptide vials and related longevity compounds, visit our sister site Peptide-Direct.
Provide your compound, dose requirement, quantity, and shipping destination for a tailored quotation.
