When importing psyllium husk from India, price is only part of the purchasing decision. The real cost usually appears after the shipment arrives — failed lab tests, an FDA hold, or product that doesn't match the spec sheet you negotiated against.
The Certificate of Analysis (CoA) is your best tool for catching these problems before dispatch. Yet most buyers only glance at it. This checklist covers exactly what to verify, parameter by parameter, and the numbers that matter.
What Is a Certificate of Analysis?
A CoA is a laboratory document confirming that a specific production batch — not the product line in general — has been tested against defined quality standards. Unlike a spec sheet or brochure, it contains actual results for the batch being shipped to you.
A professional CoA includes: batch number, manufacturing date, testing date, product description, test methods, laboratory results, acceptance specifications, and authorized laboratory sign-off.
If any of these are missing, ask why before approving dispatch.
Why Psyllium Husk Quality Varies So Much
Nearly all of the world's psyllium comes from a concentrated growing region in Gujarat and Rajasthan, India — but "same origin" does not mean "same quality." Batch quality depends on raw material grade, cleaning and dehusking processes, moisture control during storage, and packaging. The CoA turns claims like "Premium Export Grade" into measurable data you can hold the supplier to.
1. Moisture Content
Moisture is the parameter most likely to cause problems during a 25–40 day sea transit to the USA, Canada, or Europe. Excess moisture leads to mold growth, clumping, microbial activity, and shortened shelf life — problems that develop inside the container and only appear at destination.
What to check: Most buyers specify moisture at 12% maximum, with many food and nutraceutical applications requiring 10% or lower. Confirm the reported value against your purchase specification, not against the supplier's general spec sheet.
2. Swelling Index
For food, nutraceutical, and pharmaceutical buyers, swelling index is the single most important performance indicator. It measures how much water the husk absorbs — the property your customers are actually paying for.
What to check: Quality psyllium husk typically shows a swelling index of 40 ml/g or higher; pharmaceutical-grade applications often require more. Define your acceptable range in the purchase order, and confirm the CoA reports it using a stated method (USP or equivalent).
3. Purity
Psyllium husk is traded in standard purity grades — commonly 85%, 95%, 98%, and 99%. The difference is the proportion of genuine husk versus seed fragments, dust, and foreign matter.
What to check: The CoA should state the purity grade explicitly and it should match your contract. A shipment invoiced as 99% but testing at 98% is a specification failure, not a rounding error — it affects your processing costs and your customers' results.
4. Microbiological Testing
Microbial safety is where shipments get rejected, not just downgraded. The CoA should report:
- Total Plate Count (TPC)
- Yeast and mold
- Coliforms
- E. coli
- Salmonella
Salmonella deserves particular attention. US FDA requirements treat Salmonella as a zero-tolerance adulterant in ready-to-eat food ingredients — the standard test requires absence in 25 g, and detection means the shipment is adulterated regardless of every other parameter. Psyllium has been the subject of Salmonella-related import alerts and recalls before, so US buyers should treat this line as non-negotiable.
What to check: The CoA must state "Salmonella: Absent in 25 g" (or per the tested quantity). "Not tested" or a missing line is a reason to hold dispatch and request testing — not a formality to overlook.
5. Aflatoxin Testing
Aflatoxins are toxic mold byproducts that develop under poor storage conditions. The US FDA action level for total aflatoxins in food is 20 ppb (parts per billion); the EU applies stricter limits — typically 4 ppb total aflatoxins and 2 ppb for aflatoxin B1 on many food categories.
What to check: Ask for total aflatoxin and aflatoxin B1 results, reported in ppb, with the test method stated. If your supplier hesitates to test for aflatoxin, that tells you something about their storage conditions.
6. Heavy Metal Analysis
Food manufacturers increasingly require heavy metal screening: lead, arsenic, cadmium, and mercury. California's Proposition 65 and EU contaminant regulations have pushed these tests from "optional" to "expected" for many buyers.
What to check: Even if you don't require it on every shipment, a supplier who can produce heavy metal results on request has better quality systems than one who can't.
7. Batch Identification and Traceability
Every CoA must reference the exact production batch being shipped, and that batch number must match across the packaging labels, invoice, packing list, and shipping documents.
What to check: One mismatched batch number breaks your traceability chain — a serious problem under FSMA in the US and equivalent food safety systems elsewhere. Verify the numbers match before the container is sealed, not after it arrives.
8. Test Date
A CoA dated eight months before shipment may describe a different lot sitting in different storage conditions. Testing date, manufacturing date, and shipment schedule should logically correspond.
What to check: For psyllium, a CoA issued within a reasonable window of dispatch — and clearly tied to the shipped batch — is what makes the document meaningful.
9. Laboratory Credentials
An internal factory report and an independent laboratory report are not equivalent documents. Independent testing removes the conflict of interest.
What to check: In India, look for reports from NABL-accredited laboratories (National Accreditation Board for Testing and Calibration Laboratories — India's ISO/IEC 17025 accreditation body). NABL accreditation means the lab's methods and quality systems are independently audited to international standards.
10. Specification Consistency — the Check Most Buyers Skip
The biggest CoA mistake is checking whether the document exists rather than whether it matches the agreed specification. Consider:
Purchase order: Moisture ≤12% · Purity ≥99% · Salmonella absent
CoA received: Moisture 12.8% · Purity 98% · Salmonella not reported
A CoA was provided. The shipment still fails on all three parameters. Compare every result line against your contract before approving dispatch — this five-minute review is the cheapest quality control you will ever do.
Why Psyllium Shipments Actually Get Rejected
Rejections rarely trace back to price negotiations. The common causes are: high moisture, Salmonella detection, missing microbiological reports, mismatched batch documentation, incomplete CoAs, and results that don't match the purchase specification. Almost all of these are visible on paper before the container leaves India — if someone looks.
Questions to Ask Your Supplier Before Dispatch
- Can you provide the batch-specific CoA — not a generic one?
- Which laboratory performed the testing, and is it NABL-accredited?
- What is the moisture level for this batch?
- Is Salmonella reported as absent in 25 g?
- Can you provide aflatoxin results in ppb on request?
- Can you provide heavy metal analysis if required?
- Does the batch number match all shipping documents?
A professional exporter answers these confidently. Evasive answers before payment are a preview of communication after payment.
Final Thoughts
The Certificate of Analysis is the strongest tool procurement teams have for verifying quality before a shipment leaves the exporter. A careful review of moisture, swelling index, purity, Salmonella, aflatoxin, batch traceability, and laboratory credentials takes minutes — and prevents the expensive problems that show up weeks later at a destination port.
Make the CoA review part of every purchase, not just the first order from a new supplier.
Request Today's Specification and CoA
At RPM Global Exports, we source psyllium husk directly from the Unjha region of Gujarat and provide batch-specific, NABL-accredited laboratory Certificates of Analysis with every shipment — along with free pre-shipment samples and lot photos before dispatch. We're happy to share our documentation before you commit to anything.