QSC (Qingdao Sigma Chemical)
Chinese direct manufacturer and the largest peptide supplier discussed in bodybuilding and research forums. Operates domestic warehouses in the US, EU, Canada, and Australia for faster delivery. Known for extremely competitive pricing but controversial community presence including forum bans and doxxing incidents.
Score Breakdown
Weighted scoring: COA Quality (20%), Transparency (15%), Community Reputation (15%), Product Range (10%), Pricing (10%), Shipping Speed (10%), Website Experience (10%), Payment Flexibility (10%)
Pros & Cons
Pros
- Lowest prices in the market
- Massive product range
- Domestic warehouses in 4+ countries
- Direct manufacturer
Cons
- Crypto/wire only payment
- History of doxxing forum members
- Banned from MESO-Rx multiple times
- No proper website checkout
- Inconsistent customer service
- Quality concerns with some batches
Product Catalog
| Peptide | Amount | Price | In Stock | |
|---|---|---|---|---|
1-Testosterone Cypionate 100G Raw Powder | DHB unknown $1550.00 Yes | ||||
1-Testosterone Cypionate 1KG Raw Powder | DHB unknown $11500.00 Yes | ||||
5-Amino-1MQ 100G Raw Powder | NNMT Inhibitor unknown $1100.00 Yes | ||||
5-Amino-1MQ 10mg | 10-Vial Kit | NNMT Inhibitor 10mg $200.00 Yes | ||||
5-Amino-1MQ 10mg | 20-Vial Kit | NNMT Inhibitor 10mg $350.00 Yes | ||||
5-Amino-1MQ 500G Raw Powder | NNMT Inhibitor unknown $4200.00 Yes | ||||
5-Amino-1MQ 50mg | 10-Vial Kit | NNMT Inhibitor 50mg $220.00 Yes | ||||
5-Amino-1MQ 50mg | 20-Vial Kit | NNMT Inhibitor 50mg $390.00 Yes | ||||
5-Amino-1MQ 50mg Tablets | 100-Count | NNMT Inhibitor 50mg $290.00 Yes | ||||
5-Amino-1MQ 5mg | 10-Vial Kit | 50mg Total | NNMT Inhibitor 5mg $190.00 Yes | ||||
5-Amino-1MQ 5mg | 20-Vial Kit | 100mg Total | NNMT Inhibitor 5mg $330.00 Yes | ||||
A Ret 0.025% | 3 × 20gm (60gm) | TRETINOIN unknown $110.00 Yes | ||||
A Ret Gel 0.05% | 3 × 20gm (60gm) | TRETINOIN unknown $110.00 Yes | ||||
A Ret Gel 1% | 3 × 20gm (60gm) | TRETINOIN unknown $110.00 Yes | ||||
A Ret Hc Cream | 3 × 20gm (60gm) | TRETINOIN unknown $110.00 Yes | ||||
Abiranamo 250mg Tablets | 120-Count | ABIRATERONE 250mg $170.00 Yes | ||||
Abortab 200mg Tablets | 100-Count | MIFEPRISTONE 200mg $320.00 Yes | ||||
Acarbose 50mg Tablets | 100-Count | ACARBOSE 50mg $110.00 Yes | ||||
Accufine 10mg Tablets | 100-Count | ISOTRETINOIN 10mg $100.00 Yes | ||||
Accufine 30mg Tablets | 100-Count | ISOTRETINOIN 30mg $120.00 Yes | ||||
Accufine 40mg Tablets | 100-Count | ISOTRETINOIN 40mg $120.00 Yes | ||||
Accufine 5mg Tablets | 100-Count | ISOTRETINOIN 5mg $100.00 Yes | ||||
Certificate of Analysis (COA)
Some Janoshik third-party testing available. Concerns about cherry-picking favorable test results. Not all products have COAs.
Shipping Information
Shipping Information
Payment Methods
Crypto and wire transfer only. No credit card or PayPal options available. No proper website checkout system.
Peptides Available
Quick Facts
- Type
- Chinese Direct
- Location
- Qingdao City, Shandong Province, China
- Founded
- 2008
- Website
- qsc-usa.com
- Last Verified
- 2026-02-09
- Overall Score
- 5.7
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