Frequently Asked Questions

Peptide pricing depends on product, pack size and quantity, and our factory-direct rates change with raw material markets. Send us your product list via email or WhatsApp and you will receive a complete quotation within 12 hours — usually much better than posted "web prices" from resellers.

Every batch is analyzed by reverse-phase HPLC (purity ≥99+%) and mass spectrometry (molecular weight confirmation) in our own laboratory. The COA and chromatogram for your exact batch are provided with your order on request.

There is no hard minimum for catalog items — single kits are welcome. Volume pricing kicks in from 50 vials, with significant improvements at 500+ vials and for OEM production runs.

In-stock products ship within 48 hours of payment confirmation. We deliver to 40+ countries via express carriers with door-to-door tracking. All shipments use insulated, temperature-controlled packaging.

Lyophilized vials: 2–8 °C for short-term storage, −20 °C for long-term (24+ months). Reconstituted solutions should be refrigerated and used within the timeframe your protocol specifies. We also supply portable mini medicine fridges for convenient storage.

Yes. We synthesize custom sequences from 2 to 60+ amino acids at mg-to-kg scale, and we source or produce most "hard to find" compounds. Send the sequence, CAS number or product name for a quotation.

Yes — we regularly produce private-label vials, boxes and inserts for distributors and clinic brands. Minimum volumes apply (typically 500+ vials per SKU). Contact us with your brand requirements.

Standard with every order: packing list and tracking. On request at no extra cost: COA, HPLC chromatogram, MS spectrum and MSDS for your specific batch. Export/customs paperwork is prepared according to destination country.

We are the factory. Guangzhou Weitai Biotechnology Co., Ltd. owns the synthesis, purification, lyophilization, QC and packing operations at our Baiyun District, Guangzhou campus. Factory visits are welcome by appointment.

We support bank transfer (T/T), and additional payment methods can be arranged for your region. Payment details are provided with every quotation.

Absolutely — we welcome factory visits by appointment at our Guangzhou campus. Remote customers can request a live video tour of the production and QC areas.