RNX Research
RNX Research is a newer vendor with limited community history. They maintain a public per-batch COA library verified to be from an accredited third-party CRO, which supports their credibility in purity testing. However, there is no significant community presence on Reddit or Trustpilot, and their catalog is relatively small with only 7 listings. They offer credit card payments but lack multiple payment options. No FDA warnings or issues have been reported, indicating a clean regulatory record.
Score Breakdown
- Purity Testing20%85/100
- Community Reputation15%50/100
- FDA / Regulatory13%85/100
- Shipping & Fulfillment12%55/100
- Payment Security10%60/100
- Customer Service10%50/100
- Catalog Depth10%55/100
- Price Competitiveness10%60/100
Evidence
Pros & Cons
Pros
- Public per-batch COA library at /coas/ — every active SKU has a downloadable certificate with HPLC purity, FTIR identity, potency assay, batch lot, and tested date
- Independent testing by BTLabs (West Palm Beach, FL) — 25+ years pharmaceutical analytical experience, no affiliation to RNX
- Recent batch purity across the catalog: 99.5%–99.8% HPLC (Reta 99.6%, BPC 99.7%, TB-500 99.6%, MOTS-c 99.8%, Tesa 99.5%, Tirz 99.7%) — all batches tested 5/13/2026
- Tight 7-SKU catalog focused on the mainstream injectable peptides — less decision fatigue than 60+ SKU storefronts
- Volume discount tiers built into every SKU — 5 vials at 20% off, 10 vials at 40% off — for researchers running scaled protocols
- Mainstream GLP class covered — Tirzepatide 30mg + Retatrutide 10mg in stock alongside the staple healing peptides
- Public 20% off banner site-wide for any visitor — not affiliate-keyed but lowers entry-level pricing
Cons
- Very small SKU count (7 products total) — no Semaglutide, no bioregulators, no cognitive line, no blends
- BTLabs is a real third-party CRO but not the peptide-community-default tier (Janoshik / Finnrick / Kovera) — accreditation badges (ISO 17025 / A2LA) not surfaced on BTLabs' public site
- Newer entrant — limited Reddit / YouTube footprint
- Single vial size per compound (no per-compound mg tiering — only quantity tiering)
Specialties
Payment Methods
Shipping
- Domestic
- Standard carrier shipping
- International
- No
- Tracking
- Yes
- Carriers
- —
Testing Methodology
Public per-batch Certificate of Analysis library at /coas/ — every active SKU has a downloadable COA from BTLabs (5601 Corporate Way, Suite 206, West Palm Beach, FL 33407; btlabtesting.com), an analytical contract laboratory described by RNX as having no affiliation to the company. Each COA includes HPLC purity, FTIR identity confirmation, potency assay, batch lot number, and tested date. Recent batch purities (all tested 5/13/2026): Retatrutide 10mg 99.6%, BPC-157 10mg 99.7%, TB-500 10mg 99.6%, MOTS-c 10mg 99.8%, Tesamorelin 10mg 99.5%, Tirzepatide 30mg 99.7%.
FDA Warning History
No FDA warning letters on record.
Product Catalog
Every product we track from RNX Research, linked to its peptide research profile. Prices refreshed periodically — verify on the vendor site before ordering.
RNX Research — Frequently Asked
- Is RNX Research legit?
- RNX Research is a research-peptide vendor tracked in the Stacked directory, holding an independent Stacked Score of 63/100. Our score weighs third-party testing, reputation, transparency, and shipping — see the full breakdown above. No FDA warning letters are on record for RNX Research as of our last review.
- What is RNX Research's Stacked Score?
- RNX Research holds a Stacked Score of 63/100. RNX Research is a newer vendor with limited community history. They maintain a public per-batch COA library verified to be from an accredited third-party CRO, which supports their credibility in purity testing. However, there is no significant community presence on Reddit or Trustpilot, and their catalog is relatively small with only 7 listings. They offer credit card payments but lack multiple payment options. No FDA warnings or issues have been reported, indicating a clean regulatory record. The score is editorial and independent of our affiliate relationship.
- Does RNX Research third-party test its peptides?
- Public per-batch Certificate of Analysis library at /coas/ — every active SKU has a downloadable COA from BTLabs (5601 Corporate Way, Suite 206, West Palm Beach, FL 33407; btlabtesting.com), an analytical contract laboratory described by RNX as having no affiliation to the company. Each COA includes HPLC purity, FTIR identity confirmation, potency assay, batch lot number, and tested date. Recent b
- Does RNX Research ship internationally?
- RNX Research ships within the US. Typical domestic delivery runs Standard carrier shipping. Tracking is provided. Confirm current shipping terms on the vendor's site before ordering.
- Has RNX Research received any FDA warning letters?
- No FDA warning letters are on record for RNX Research as of our last review. We surface any that appear on the vendor profile.
Affiliate Disclosure
Disclosure
Stacked earns a commission on purchases via affiliate links on this page. This does not influence our Stacked Score methodology.