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 | |
|---|---|---|---|---|
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 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 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 | ||||
5-Amino-1MQ 60mg Tablets | 1000-Count | NNMT Inhibitor 60mg $1000.00 Yes | ||||
ADAMAX 10mg | 10-Vial Kit | Metabolic Modulation 10mg $280.00 Yes | ||||
ADAMAX 10mg | 20-Vial Kit | Metabolic Modulation 10mg $510.00 Yes | ||||
ADAMAX 5mg | 10-Vial Kit | Metabolic Modulation 5mg $270.00 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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Peptides (32)
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