Specification first
We start from your target profile — assay, appearance, solubility, residual solvents, microbial limits. If we cannot meet it, we say so before the quote.
Peptide & fermentation manufacturing · Xi'an, China
Peptides and actives,
made to be verified.
Eastling Biotech supplies catalog peptides, custom synthesis and natural fermented ingredients to formulators, distributors and research teams — with batch-level documentation as standard, not as an extra.
95
Catalog products
99%
Typical HPLC purity
24h
Quotation response
100%
Batch COA coverage
Why Eastling
A supply partner that shows its work.
Purity is a claim; documentation is proof. Every lot we release is tested against a written specification and shipped with the data to support it — so your QA team can file it, audit it, and pass it on to your own customers.
Analytical transparency
HPLC chromatograms and LC–MS identity data accompany every commercial batch. Third-party verification can be arranged with the laboratory of your choice.
Batch traceability
Fermentation, isolation, purification and packing are recorded lot by lot, from raw material intake to the sealed vial in your hand.
Responsive sourcing
Quotations within one working day, samples in days rather than weeks, and a named contact for every account — not a shared inbox.
Analytical suite
HPLC · LC–MS · Microbiology
What we supply
Two lines,
one quality standard.
Peptides for formulation and research, and fermentation-derived actives for supplements and personal care. Different chemistry, the same release criteria.
Peptides
Peptide products
Fifty-six catalog peptides across four research families, plus custom synthesis against your sequence.
View peptide lines
Fermentation
Natural fermented actives
Thirty-nine fermentation-derived ingredients for dietary supplement, functional food and personal care formulations.
Browse the catalog
Custom
Custom synthesis & OEM
From gram-scale feasibility to commercial batches, produced to your specification, your packaging and your label.
Start a projectSelected from the catalog
In stock, in specification.
A short view of the fermentation portfolio. Each entry carries a batch number, a measured assay and a certificate of analysis on release.
EA001
99%
NMN
β-Nicotinamide mononucleotide · Nucleotide
Request
EA013
99%
Spermidine
Spermidine trihydrochloride · Cellular health
Request
EP003
99%
Glutathione
Reduced L-glutathione · Antioxidant
Request
EA012
99%
L-Ergothioneine
Fermentation-derived thione · Antioxidant
Request
EA004
98%
PQQ
Pyrroloquinoline quinone disodium salt · Coenzyme
Request
EA017
80–100M Da
Sodium hyaluronate
High molecular weight · Cosmetic active
Request
Quality & documentation
Every batch arrives
with its story.
Not a generic spec sheet — the actual data for the lot that was packed for you. Nothing leaves the facility until the file is complete.
- Certificate of analysisAssay, appearance, loss on drying
- HPLC chromatogramPurity profile per lot
- LC–MS identityMolecular weight confirmation
- Specification sheetWritten release criteria
- Safety data sheetHandling, storage, transport
- Third-party testingOn request, buyer-nominated lab
Certificate of Analysis
Batch no.ES26-0412-SPD
Rev. 02
- Product
- Spermidine trihydrochloride
- Appearance
- White crystalline powder
- Assay (HPLC)
- 99.2%
- Water content
- 0.4%
- Heavy metals
- < 10 ppm
- Total plate count
- < 100 cfu/g
- Storage
- 2–8 °C, protected from light
- Retest date
- 24 months
Released by QA · Eastling Biotech
QCPassed
Lot released
Lot released
How it works
From enquiry
to container.
No portals, no silence. A specialist owns your file from the first message to the shipping documents.
01
Brief us
Send the product, specification, quantity and destination. We reply with availability, lead time and the documentation we can supply.
02
Approve the lot
Review the COA, request a sample, and confirm packaging and terms. Nothing ships without your written approval.
03
Production & dispatch
We schedule the batch, release it against specification, and hand over the export file with the shipment.
Quality control laboratory · Xi'an
About Eastling
Based in Xi'an.
Built for export.
Eastling Biotech works at the intersection of fermentation and peptide chemistry. Our team handles the part most suppliers leave to chance: turning a specification into a repeatable batch, and a batch into a file your auditors will accept.
We are deliberately small on the commercial side and deliberately strict on the technical side. That is why customers stay for the second order.
95Catalog products
4Product ranges
6Continents served
Next step
Tell us what you need to make.
A specification, a quantity, a destination. We will tell you honestly whether we can meet it — and exactly how we would.