Do you offer bulk discounts?

Yes! We offer automatic volume discounts on most products (shown on each product card), plus our Prosperity Sale tiered discounts: Orders $500+ get 5% OFF + Free Express Shipping, Orders $1,000+ get 10% OFF, Orders $2,500+ get 20% OFF. For institutional or wholesale orders, contact us on Telegram for custom pricing.

What is your return policy?

We never ask you to return products. For any quality issues: Full refund to your original payment method, Free replacement shipped at our cost, or Store credit at 110% value (bonus 10%). Claims can be filed within 60 days of order date. We require minimal evidence — usually just a photo. We stand behind every product we sell.

Direct Manufacturer — Nantong, China

Research-Grade Compounds
Factory Direct 源

Q: What are the shipping times?

Standard shipping: $25 worldwide with full tracking — 7-15 business days from our Nantong, China warehouse. We ship to all countries with discreet packaging. Express Priority shipping: $50 — fully tracked via USPS Priority Express (US), Royal Mail Special Delivery (UK), DHL Express (EU), and equivalent priority couriers worldwide.

Q: What payment methods do you accept?

We accept Visa, Mastercard, Apple Pay, Google Pay, Revolut, and bank transfer through our secure, PCI-compliant payment processor. You pay the exact USD amount shown — your card is charged in dollars just like any regular online purchase. We also accept cryptocurrency (BTC, ETH, USDT, USDC, SOL, XRP, LTC, BNB) with 10% off your order. All payments are processed through 256-bit encrypted channels.

Q: How do you ensure product quality?

Every product is independently tested by Janoshik Analytical — the industry's gold standard laboratory for purity and potency verification. Our products consistently achieve 99.5%+ purity, confirmed via HPLC and mass spectrometry analysis. We have Janoshik verified test reports with full certificates of analysis (COA) available. We are also a Finnrick verified vendor.

Q: What is your delivery guarantee?

We offer a 100% delivery guarantee. If your package does not arrive, we reship your entire order at no cost. Customs seizure: We reship immediately upon receiving the seizure letter. Lost packages: If tracking shows no update for 30+ days, you get a free reship or full refund. Damaged goods: Full replacement shipped at our expense. Your purchase is always protected.

Q: How can I contact support?

Telegram: Message our team — fastest response, typically within minutes during business hours. Email: support@gycpeptides.net — response within 1-24 hours. We provide pre-sale support, order tracking, and post-delivery assistance. For urgent matters, Telegram is strongly recommended.

350+ Janoshik-tested peptides, SARMs, injectables & raws manufactured in Nantong (南通), China — shipped from local warehouses in the US, UK, Canada, EU & Australia.

Browse Products Full Price List Test Reports

Janoshik Tested Finnrick Verified Buyer Protection

繁荣 Prosperity Sale Ends in --

$500+ 5% OFF + Free Express

$1,000+ 10% OFF

$2,500+ 20% OFF

Enquiries: Telegram | WhatsApp | Email

Secure Payment Methods

Visa / Mastercard

Apple Pay

Google Pay

Revolut

Bank Transfer

Crypto 10% OFF

Trust & Quality 品质信赖

Independently verified and trusted across leading research forums

Janoshik Analytical

Every batch independently tested — 99.5%+ purity via HPLC & mass spectrometry. Full COA available.

View Test Reports

Finnrick Verified

Verified vendor with customer ratings and reviews on Finnrick marketplace.

View Profile

GLP1Forum Verified

Verified on GLP1Forum with community reviews and bloodwork results.

View Thread

350+ Products

100% Janoshik Tested

99.5%+ Avg Purity

4.9/5 Reviews

Global Shipping

How It Works

Simple 5-step ordering process

Browse & Order

Choose from 350+ products and add to cart

Secure Payment

Pay with card, crypto, or bank transfer

Processing

Quality-checked and packed within 24 hours

Tracked Shipping

Worldwide delivery with full tracking

24/7 Support

Post-delivery assistance always available

Frequently Asked Questions

Nantong Guangyuan Chemical Co., Ltd. (GYC) is a direct manufacturer and exporter based in Nantong, China. We produce and supply 350+ research-grade compounds including peptides, SARMs, injectable oils, oral tablets, and raw materials. All products are independently tested by Janoshik Analytical with certificates of analysis (COA) available. We are a Finnrick verified vendor with Verified on GLP1Forum.

All orders must be placed through our website. Browse our products page, add items to your cart, and proceed to checkout. Fill in your shipping details, then choose your payment method — we accept Visa, Mastercard, Apple Pay, Google Pay, Revolut, bank transfer, or cryptocurrency (BTC, ETH, USDT, USDC, SOL, XRP, LTC, BNB). Crypto payments receive a 10% discount. For questions or support, message us on Telegram.

Standard shipping: $25 worldwide with full tracking — 7-15 business days from our Nantong, China warehouse. We ship to all countries with discreet packaging.
Express Priority shipping: $50 — fully tracked via USPS Priority Express (US), Royal Mail Special Delivery (UK), DHL Express (EU), and equivalent priority couriers worldwide.

We accept Visa, Mastercard, Apple Pay, Google Pay, Revolut, and bank transfer through our secure, PCI-compliant payment processor. You pay the exact USD amount shown — your card is charged in dollars just like any regular online purchase. We also accept cryptocurrency (BTC, ETH, USDT, USDC, SOL, XRP, LTC, BNB) with 10% off your order. All payments are processed through 256-bit encrypted channels and your card details are never stored by us.

Every product is independently tested by Janoshik Analytical — the industry's gold standard laboratory for purity and potency verification. Our products consistently achieve 99.5%+ purity, confirmed via HPLC and mass spectrometry analysis. We have Janoshik verified test reports with full certificates of analysis (COA) that you can view here. We are also a Finnrick verified vendor.

Yes! We offer automatic volume discounts on most products (shown on each product card), plus our Prosperity Sale tiered discounts:
• Orders $500+ — 5% OFF + Free Express Shipping
• Orders $1,000+ — 10% OFF
• Orders $2,500+ — 20% OFF
For institutional or wholesale orders, contact us on Telegram for custom pricing.

We offer a 100% delivery guarantee. If your package does not arrive, we reship your entire order at no cost. Specifically:
• Customs seizure: We reship immediately upon receiving the seizure letter
• Lost packages: If tracking shows no update for 30+ days, you get a free reship or full refund
• Damaged goods: Full replacement shipped at our expense
Your purchase is always protected.

Yes, we offer OEM services and custom synthesis for bulk orders. We can accommodate custom formulations, dosing, packaging, and labeling. Contact us on Telegram or email support@gycpeptides.net to discuss your specific requirements and receive a quote.

Telegram: Message our team — fastest response, typically within minutes during business hours
Email: support@gycpeptides.net — response within 1-24 hours
We provide pre-sale support, order tracking, and post-delivery assistance. For urgent matters, Telegram is strongly recommended.

We never ask you to return products. For any quality issues:
• Full refund to your original payment method
• Free replacement shipped at our cost
• Store credit at 110% value (bonus 10%)
Claims can be filed within 60 days of order date. We require minimal evidence — usually just a photo. We stand behind every product we sell.

Research-Grade CompoundsFactory Direct 源