Last updated: May 2026
Summary: A reference glossary of the 20 most essential terms in the research peptide reseller industry. Designed for new resellers, supplement brands evaluating peptides, and procurement teams evaluating suppliers. Each entry includes the term, a concise definition, and the practical context where it matters.
Manufacturing and quality
COA (Certificate of Analysis)
A document produced by an independent analytical laboratory verifying the identity, purity, and contamination profile of a specific peptide batch. Reputable suppliers ship a COA with every batch. Without a per-batch COA, a peptide is essentially unverified product.
HPLC (High-Performance Liquid Chromatography)
The standard analytical technique for quantifying peptide purity. Reverse-phase HPLC separates a peptide from impurities and measures the percentage of target compound in the sample. A peptide labeled “99% purity by HPLC” has been independently measured.
Mass spectrometry (MS)
The standard analytical technique for confirming peptide identity. MS measures the molecular weight of the compound, which is compared against the theoretical molecular weight of the target sequence. Discrepancies indicate the wrong peptide or contamination.
SPPS (Solid-Phase Peptide Synthesis)
The dominant method for manufacturing synthetic peptides. SPPS builds a peptide one amino acid at a time on an insoluble resin support, then cleaves the finished peptide off for purification. Industry-standard for research-grade peptides.
Lyophilized
Freeze-dried. Most research peptides ship as lyophilized white powder, which is significantly more stable than the same peptide in solution. Lyophilized product is reconstituted with a sterile diluent at the point of use.
Counterion (TFA salt, acetate salt)
The non-peptide ion paired with the synthesized peptide. TFA (trifluoroacetate) is the most common, a residual from the SPPS purification process. Acetate-form peptides exist for research applications where TFA is incompatible. The COA documents the counterion form.
Endotoxin testing (LAL)
The Limulus Amebocyte Lysate (LAL) assay tests for bacterial endotoxin contamination. Relevant for research applications that require low-endotoxin material. Standard COAs may not include LAL by default — most suppliers run it on request.
Business model and fulfillment
Dropshipping
A fulfillment model where a reseller takes orders without holding inventory and the supplier ships directly to the end customer. The reseller’s role is customer acquisition, brand, and customer support; the supplier’s role is manufacturing, QC, and shipping. See the peptide dropshipping guide for a deep dive.
MOQ (Minimum Order Quantity)
The smallest quantity a supplier will sell in a single order. Direct manufacturer relationships often have MOQs of 1,000+ units; dropshipping platforms typically have zero MOQ. MOQ is a major capital-commitment factor in supplier selection.
White-label
A fulfillment model where supplier-manufactured product ships under the reseller’s brand — your label, your packaging, your inserts, but the supplier’s underlying formulation. The supplier is invisible to the end customer. Cheapest and fastest path to a branded peptide business.
Private-label
A fulfillment model where the supplier manufactures a custom SKU specifically for the reseller — custom pack sizes, custom formulation, or custom presentation. Higher minimums than white-label, longer setup, but defensible product differentiation. See the white-label vs. private-label guide.
Wholesale tier
A pricing band that activates at a specified monthly purchase volume. Higher tiers unlock lower per-unit costs. Most peptide dropshipping suppliers operate 3–5 tiers ranging from no-minimum entry to high-volume strategic-partner tiers.
3PL (Third-Party Logistics)
A fulfillment provider that handles warehousing, packing, and shipping on behalf of a reseller who holds inventory. 3PL is the alternative to dropshipping for resellers who choose to hold their own inventory. Examples include ShipBob, ShipMonk, and many supplement-specialized 3PLs.
Compliance and labeling
RUO (Research Use Only)
The labeling and marketing framework under which research-grade peptides are legally sold in the United States. RUO requires that products are labeled “for research use only — not for human consumption” on all packaging and customer-facing materials. The framework is the foundation of peptide-reseller compliance.
FDA disclaimer
The required statement on US-sold research peptide product pages, packaging, and customer communications: “These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any condition. For research purposes only — not for human consumption.” Critical for compliance and payment processor approval.
Restricted-products policy
A storefront platform’s (Shopify, BigCommerce, Amazon, etc.) written policy listing product categories with special handling requirements. Research peptides commonly require additional age-gating, labeling, and category-specific approval. A single violation can trigger account suspension.
Age-gating
A storefront feature that requires visitors to confirm they are 18 or 21+ before accessing product pages. Required in some US states for research peptide stores; recommended universally as a compliance signal to payment processors and platforms.
Sales and pricing
API integration
A programmatic connection between a reseller’s storefront and the supplier’s fulfillment system, used for real-time inventory sync, automated order routing, and tracking webhooks. Essential for scaling past a few orders per day without manual operations overhead.
LTV (Customer Lifetime Value)
The total revenue a reseller expects to earn from a single customer over their entire relationship. Peptide LTV is typically higher than commodity-supplement LTV because of repeat-purchase behavior and higher per-order values. A key metric for marketing budget decisions.
CAC (Customer Acquisition Cost)
The cost of acquiring a single customer. Peptide CAC is often higher than mainstream e-commerce niches because paid ads (Google, Meta, TikTok) restrict peptide advertising. Most peptide resellers rely on SEO, content, and community-driven acquisition where CAC is lower but slower to scale.
Net margin per unit
The dollar margin remaining after wholesale cost, payment processing, fulfillment fees, and any white-label premium. Typical research-peptide net margin is 40%+ — meaningfully higher than commodity dropshipping niches.
Peptide synthesis chemistry
Amino acid residue
The chemical unit that makes up a peptide. Most natural peptides use the 20 standard amino acids, though synthetic peptides often include modified or non-natural amino acids (e.g., D-amino acids, Aib, ornithine). The number of residues defines peptide length — a “pentapeptide” has 5 residues, a “29-mer” has 29.
N-terminal / C-terminal
The two ends of a peptide chain. The N-terminus has a free amine group; the C-terminus has a free carboxyl group. Many synthetic peptides are modified at one or both terminals (e.g., N-terminal acetylation as in TB-500, C-terminal amidation as in Ipamorelin) to change stability or activity in research contexts.
Disulfide bridge
A covalent bond between two cysteine residues that creates a loop or constrains the peptide’s three-dimensional structure. Common in larger peptides (e.g., AOD-9604, oxytocin). The disulfide bridge is part of the molecular identity — a peptide with the bridge unformed is a different compound, which is why mass spectrometry verification on a disulfide-containing peptide must confirm the bridge.
Lyophilization (freeze-drying)
The process of removing water from a frozen peptide solution under vacuum, leaving stable solid powder. Lyophilized peptides typically have shelf lives measured in years at −20°C; the same peptides in solution can degrade in days. All research-grade peptides ship lyophilized for this reason.
Reconstitution
The process of dissolving lyophilized peptide powder back into a solvent (typically bacteriostatic water or sterile saline for research applications) for use. Once reconstituted, peptide stability decreases significantly — most reconstituted peptides need refrigeration and have stability windows measured in weeks rather than years.
Bacteriostatic water
Sterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative. Common solvent for reconstituting research peptides because it extends post-reconstitution stability by preventing microbial contamination. Available as a research-grade diluent for laboratory applications.
Acetate vs. TFA salt
The two most common counterion forms for synthetic peptides. TFA (trifluoroacetate) is the standard byproduct of SPPS purification. Acetate is used when TFA is incompatible with the research application (e.g., some in-vivo studies). Switching between salt forms requires a separate ion-exchange step and is documented on the COA.
Business model and operations
Wholesale tier upgrade
The process of moving from one wholesale pricing tier to the next based on accumulated monthly order volume. Most peptide dropshipping platforms (including PeptideDropship) re-evaluate tier eligibility quarterly. Partners that grow into a higher tier benefit from lower per-unit costs.
Reseller markup
The difference between the wholesale price a reseller pays the supplier and the retail price the reseller charges their end customer. For research peptides, typical markup is 2-3× wholesale, producing 40-50%+ net margin per unit after payment processing fees.
Dropship vs. inventory model
Two operational paths for reselling peptides. Dropship: the reseller takes orders without holding inventory; the supplier ships directly to end customers. Inventory: the reseller buys stock from a supplier and warehouses it, shipping to end customers themselves (or via 3PL). Dropship has lower capital requirements; inventory gives more control over fulfillment.
Cold-chain shipping
Temperature-controlled shipping for products requiring refrigeration or freezing during transit. Most lyophilized research peptides are stable enough at room temperature for short-duration transit (≤7 days), but reconstituted peptides, sensitive longer-sequence peptides, or specific research applications may require cold-chain.
Tamper-evident closure
Vial sealing (typically heat-shrink seal or aluminum flip-off cap) that visibly shows whether a vial has been opened. Required for any research-grade peptide product because tampered or previously opened vials cannot be sold as new and represent a chain-of-custody failure.
Compliance and regulatory
Research-use-only (RUO) labeling
The required labeling framework for synthetic peptides sold for laboratory research in the United States. Every product page, every vial, every customer communication must carry “For research use only — not for human consumption.” Distinct from FDA-approved clinical labeling, which requires a different regulatory pathway.
FDA disclaimer
The required statement on US-sold research peptide pages: “These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any condition. For research purposes only — not for human consumption.” Combined with RUO labeling, these form the baseline compliance framework for research-peptide resellers.
Chain of custody
Documented record of the path a peptide takes from manufacturing through end customer. Includes batch number, manufacture date, COA, shipping records, and partner handoffs. A complete chain of custody is what enables traceability if a quality issue arises post-shipment.
Restricted-products policy (storefront)
The written policy on storefront platforms (Shopify, BigCommerce, WooCommerce-based hosts) listing product categories with special handling requirements. Research peptides are commonly listed under “restricted products” — sellers must comply with platform-specific requirements (age-gating, specific labeling, no consumer-health claims) or face account suspension.
YMYL (Your Money or Your Life)
Google’s classification for content categories where inaccurate information could harm users — including health, finance, and safety topics. Research peptide content sits in a YMYL-adjacent zone: strict research-context framing keeps a site out of consumer-health YMYL scoring; drift into consumer-health language pulls a site INTO YMYL scoring, where ranking requires much stronger E-E-A-T signals.
E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness)
Google’s framework for evaluating content quality, especially in YMYL categories. For research-peptide content, E-E-A-T signals include: named authors with relevant credentials, transparent compliance documentation, third-party COAs, clear About and Contact pages, real testimonials with attribution, and citations to primary scientific sources.
High-risk merchant account
A payment processor category for merchants in regulated, restricted, or chargeback-prone industries — including research peptides, nutraceuticals, and some health-adjacent products. High-risk accounts typically have higher fees (3-5% vs. standard ~2.9%), longer hold periods, and stricter documentation requirements. Payment processor selection is consistently the single hardest operational step for new peptide resellers.
Get started
If you’re new to the research peptide reseller space, start with the peptide dropshipping guide for a full business model overview, then the how to start a peptide business guide for a 30-day launch playbook. To apply for verified partner access with PeptideDropship, start here.
This glossary is for reference only and does not constitute legal, regulatory, or business advice. Resellers are responsible for compliance with applicable state, local, and international regulations. PeptideDropship sells research-grade peptides exclusively to verified B2B partners under research-use-only labeling. These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any condition. For research purposes only — not for human consumption.
Ready to evaluate PeptideDropship?
Apply for verified partner access. Verification typically completes within 1–3 business days. After approval you get partner-specific wholesale pricing, sample COAs, compliance templates, and payment processor introductions (subject to third-party approval).
Start a Partner Application →B2B only. Research use only. Not for human consumption.