NAD+ Supplier China: 100mg to 1000mg COA Guide

Define NAD+ as a dinucleotide, not a peptide

Write the full controlled name nicotinamide adenine dinucleotide and specify the oxidized NAD+ form requested. Include the approved synonym, CAS number where applicable, molecular formula and mass, counterion or salt status, hydration state, physical form, nominal quantity, Research Use Only scope and required documents. Do not let a catalog category, vial image or the phrases NAD peptide and longevity molecule replace chemical identity. The quotation, specification, COA, label, invoice and packing list should all map to one controlled material name, SKU and batch.

Keep NAD+, NADH and related abbreviations separate

NAD+ and NADH are the oxidized and reduced forms of the dinucleotide and are not interchangeable product names. NADP+, NADPH, NMN, NR and nicotinamide are also separate substances, even though search pages may discuss them together as cofactors or precursors. Require the supplier to state the exact form and expected molecular information, and review identity evidence against that target. If an alternative form is offered, create a new line item and technical review rather than accepting a silent synonym. A matching nominal amount or similar white appearance cannot establish identity.

Control 100mg, 500mg and 1000mg as separate SKUs

Create a distinct RFQ row for each format with nominal amount per unit, unit count, total requested material, fill tolerance, physical form, packaging, parent lot, finished lot and price basis. A 1000mg unit is not documented by simply multiplying the 100mg label because filling records, containers, formulation and lot genealogy may differ. Ask whether the stated amount means dry NAD+ equivalent, total salt or hydrate, total lyophilized mass, or another basis. Compare cost per documented target amount only after those definitions are aligned, and prohibit strength substitution without approval.

Separate chromatographic purity, assay and vial content

A chromatographic area percentage describes the relative signal under a stated method; it does not automatically prove chemical identity, dry-basis assay or finished-unit quantity. A useful batch review distinguishes identity, related substances or chromatographic purity, assay, water content where relevant, and quantitative content per unit. For a UV-based method, ask for the wavelength, reference standard, integration and method scope instead of treating a single 99 percent result as universal proof. Review sample ID, expected and observed information, specification, actual result, units, dates and authorization for the offered batch.

Build a traceable NAD+ documentation and change-control gate

Request the signed batch COA, complete analytical attachments appropriate to the specification, SDS, approved specification, supplier-supported storage statement and label proof before dispatch. Map the legal seller, material manufacturer, testing laboratory, filler, release authority, inventory owner and shipper. Require advance notice for changes to production route, form, counterion, hydration state, testing, filling, packaging or critical subcontractors. At receiving, reconcile product, strength, lot, quantity, seals and documents and quarantine unexplained identity, amount, color, packaging or certificate differences until a documented investigation is complete.

Build one comparable wholesale RFQ matrix

Send every candidate the same fields: controlled identity, strength, vial count, total material, target purity or composition, identity method, quantitative-content basis, offered lot, testing status, packaging, documents, MOQ, lead time and shipping term. Mark missing answers as exceptions instead of filling gaps with assumptions. Separate testing, setup, customization and transport costs from recurring unit price. A standardized matrix gives scientific, purchasing and quality reviewers one auditable record and prevents an incomplete offer from appearing cheaper simply because it describes less work.

Apply a batch-focused quality-control review

Define every required attribute, acceptance criterion, method and record before purchase. Use the quality-control framework to connect each supplier claim to evidence and its method scope. Check sample identifiers, dates, report numbers, units and lot relationships across the complete reports. Batch-specific evidence is more decision-useful than a representative certificate. Preserve original files, record revisions and investigate contradictions before approving shipment. Where risk warrants, arrange independent testing under a documented sampling and custody plan.

Create a documentation gate before dispatch

List the required batch COA, analytical attachments, SDS, specification, supported storage statement, label proof, invoice and packing list in the RFQ and purchase order. Reconcile product, strength, lot, quantity and revision across records with the documentation guide. Require replacement documents when the offered lot changes. The importer remains responsible for current destination requirements. Research-use wording improves clarity but cannot guarantee customs entry or replace destination-specific legal and broker review.

Verify supplier and batch ownership

Document the legal seller, manufacturing site, analytical laboratory, filling or packaging site, inventory owner, release authority and dispatch entity for the exact SKU. A trading or coordination company can work with qualified partners, but roles and accountability must be transparent. Ask who owns the batch record, authorizes release, handles deviations and provides corrective action. Require advance notification when a critical party changes. Business-registration evidence supports identity but does not replace technical qualification of the offered lot.

Plan logistics and receiving controls

Confirm dispatch location, carrier, shipping term, packaging configuration and realistic production, release and transit windows. Reject guarantees of customs clearance or misleading declarations. On receipt, document package condition, seals, product, strength, lot and quantity, then connect internal inventory to the supplier batch. Store according to the applicable approved specification and quarantine unexplained damage, label conflicts, quantity differences or excursions until a documented quality decision is completed.

Use actual performance for repeat-order approval

A controlled evaluation order should use the same specification and evidence expectations planned for wholesale scale. Assess document accuracy, packaging, delivery time, communication and corrective response. Update a supplier scorecard from observed performance rather than catalog breadth or claims. For every new lot, repeat the batch review and approve current documents before dispatch. Require notification before changes to material specification, manufacturing, testing, filling, labels, packaging or other buyer-approved conditions.

Related products and same-category guides

• NAD+ 100mg
• NAD+ 500mg
• NAD+ 1000mg
• NAD+ vs Glutathione Sourcing Guide
• GHK-Cu Bulk Purity Guide

Frequently asked questions