ZC Labs is a U.S. research peptide supplier that leads with one claim: every new batch is tested by an independent lab and the results are posted for anyone to read. This review looks at what ZC Labs says it tests, how its catalog, pricing, shipping and guarantees work, and what to double-check before you order. Everything below comes from the company’s own site as of late October 2026, so verify current terms before you buy.
ZC Labs at a Glance
| Focus | Research peptides and lab supplies, sold for laboratory research use only |
| Testing | 7-test panel at ILS Laboratories; also lists Freedom Diagnostics as a second U.S. lab |
| Published average purity | 99.53% across 26 lab reports (self-reported) |
| Dispatch | Within 24 hours; orders by 12pm ET |
| Shipping | Free FedEx 2Day over $199 after discounts; $12.99 flat under that |
| Guarantees | 30-day money-back guarantee; $50 off if delivery takes longer than 5 business days |
| Discount code | ZBONUS |
Discount: use code ZBONUS at checkout. Visit ZC Labs →
Lab Testing and COAs
Testing is the main reason to consider any research supplier, so this is where ZC Labs spends most of its page real estate. The company says each new batch goes through seven tests at ILS Laboratories:
- Purity
- Identity (does the vial contain what the label says)
- Amount in vial
- Fentanyl screen
- Heavy metals
- Sterility
- Endotoxins
It also lists Freedom Diagnostics as a second independent U.S. lab, and offers a batch lookup so you can pull up a signed, dated certificate of analysis (COA) by code. The headline number is a 99.53% average purity across 26 published lab reports. ZC Labs notes that 20 of those used the newer 7-test panel while earlier ones used a 4-test panel, and that the figure was updated in August 2026. That disclosure is a good sign, since it is a plain statement of where the average comes from.
Keep the limits in mind. An average purity is a company-reported summary, not a guarantee for the vial you receive. The useful check is to match the lot number on your vial to a published COA and confirm the test date and lab. Our COA red flags checklist walks through exactly how.
Catalog and Pricing
The catalog is broad, with roughly 30 listings across peptide, metabolic, endocrine, neuro, cellular and melanocortin categories, plus lab supplies. Examples of listed prices at the time of writing (some items show a sale price):
| Product | Size | Listed price |
|---|---|---|
| BPC-157 | 10mg | $27.99 (list $29.99) |
| TB-500 | 10mg | $41.99 (list $44.99) |
| GHK-Cu | 100mg | $29.99 |
| GHK-Cu raw powder | 1g | $39.99 |
| KPV | 10mg | $27.99 (list $44.99) |
| MOTS-c | 10-40mg | $34.99 (list $39.99) |
| NAD+ | 500-1000mg | $34.99 (list $44.99) |
| Selank | 5-10mg | $18.99 (list $19.99) |
| Epithalon | 50mg | $44.99 |
| KLOW blend | 80mg | $69.99 (list $79.99) |
| ZC-RT | 10-30mg | $34.99 (list $49.99) |
| ZC-TZ | 10-30mg | $24.99 (list $29.99) |
The catalog also includes ipamorelin and CJC blends, Semax, DSIP, SS-31, Melanotan 1 and 2, glutathione, laboratory diluent solution, a peptide vial case and a GHK-Cu face cream. Prices change often during sales, so treat the table as a snapshot.
Volume pricing
ZC Labs applies tiered pricing automatically at checkout, with no code needed. It advertises savings of up to 29% at 5 vials and up to 48% at 10 vials. Reviewers on the site also mention periodic buy-one-get-one sales.
Shipping and Guarantees
- Dispatch: orders placed by 12pm ET are advertised to ship within 24 hours.
- Carrier and cost: FedEx 2Day, free on orders of $199 or more after discounts, otherwise $12.99 flat.
- Delivery promise: if an order takes longer than 5 business days to arrive, ZC Labs says it will automatically send a $50 coupon toward your next $100+ order, valid for 90 days, limited to one per 90 days.
- Quality guarantee: a 30-day money-back guarantee covers a purity issue, a wrong item or damage, with a full refund or free replacement and nothing to return. It is limited to one claim per customer and applies to retail orders. Read the full terms on their site.
What Customers Say
The ZC Labs homepage shows dozens of five-star testimonials. Common themes are fast shipping, secure packaging, small free extras such as vial cases and caps, a photo of your order before it ships, responsive support and an active Discord community. These testimonials are hosted on the company’s own site, so they are not an independent sample. Look at third-party review sites and community forums as well before forming an opinion.
Pros and Cons
Pros
- Seven-test panel at an independent U.S. lab, with batch lookup of signed COAs.
- Transparent note on how the average purity figure was calculated.
- Wide catalog with frequent sales and automatic volume discounts.
- Fast stated dispatch, free 2-day shipping over $199, and a written delivery guarantee.
- 30-day money-back guarantee on retail orders.
Cons and things to check
- The headline purity and the “25,000+ orders shipped” figure are company-reported and not independently verified.
- At the time of writing, a few listings, such as Melanotan 1 and Semax, did not show a “COA Verified” badge, so confirm a COA exists for the specific product and lot before ordering.
- Earlier published reports used a 4-test panel rather than the full seven.
- Testimonials are on-site and curated.
- Products are labeled for laboratory research use only.
How to Order Smart
- Pick your compound and open its page to find the “COA Verified” mark.
- Look up the lot on the batch verification page and check the lab, date and the purity, identity and sterility results.
- Apply code ZBONUS at checkout and compare the total with volume tiers before adding more vials.
- When the package arrives, match the lot number on the vial to the COA you saw.
Also see how ZC Labs stacks up against other suppliers in our supplier comparison, and browse background on specific compounds in the peptide directory.
Frequently Asked Questions
Is ZC Labs legit?
ZC Labs publishes independent lab results and offers batch lookup, which is more transparency than many sellers provide. We have not independently tested its products, so check each lot’s COA yourself.
What is the ZC Labs discount code?
Use ZBONUS at checkout. Shop ZC Labs →
Where does ZC Labs ship from and how fast?
It states 24-hour dispatch on orders by 12pm ET through FedEx 2Day, with a $50 coupon promise if delivery takes more than 5 business days.
Are ZC Labs products for human use?
No. ZC Labs sells its compounds for laboratory research use only, not for human or veterinary use.
Verdict
ZC Labs earns attention mainly for its testing transparency, broad catalog and clear shipping and guarantee terms. The weak points are the usual ones for this industry: key numbers are self-reported, and COA coverage should be verified product by product. If you do buy, check the lot against the lab report and keep your receipts. Get started at ZC Labs with code ZBONUS →
Disclosure: This post contains affiliate links. If you buy through them, Peptide News may earn a commission at no extra cost to you. Information is from the company’s website and may change. Products discussed are sold for laboratory research use only and are not intended for human or veterinary use. This is not medical advice.
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