Why Every Hemp Brand Needs Third-Party Lab Testing

TL;DR

• Third-party lab testing confirms what’s in a hemp product (cannabinoid potency) and what’s not in it (common contaminants).
• A Certificate of Analysis (COA) is the lab report you can use to verify batch details, potency, and safety screening.
• Independent testing helps brands support accurate labeling—a known issue in the hemp/CBD market (e.g., a 2017 JAMA study found many online CBD products were mislabeled).
• For shoppers, the fastest check is: match the batch/lot number, confirm cannabinoid totals, and review contaminant panels.

Hemp products have expanded far beyond tinctures—today you’ll see everything from
THCa flower to gummies, vapes, and minor-cannabinoid formulas.
With that variety comes a simple consumer question: “How do I know this is what the label says it is?”

Third-party lab testing is one of the clearest, most defensible ways a hemp brand can demonstrate quality control.
It produces a batch-specific Certificate of Analysis (COA) that documents cannabinoid potency and screens for common contaminants.
Below is what third-party testing is, how it works, why it matters for trust and compliance, and how to read a COA in under two minutes.

What Is Third-Party Lab Testing in Hemp?

Third-party lab testing means sending a finished hemp product (or sometimes raw material and in-process samples)
to an independent laboratory that is not owned or controlled by the brand. The lab analyzes the sample and issues a COA.

What labs typically test for

• Cannabinoid potency (e.g., CBD, CBG, and THC variants such as Delta-9 THC)
• Contaminants such as heavy metals, pesticides, residual solvents (for extracts), and microbial impurities
• Additional chemistry (often terpenes) depending on product type and brand standards

Potency testing is especially important for hemp products because U.S. federal hemp law defines hemp by its
Delta-9 THC concentration (≤ 0.3% by dry weight) in the plant material. Rules and enforcement can vary by state and product category,
so brands commonly use COAs as part of their compliance and quality documentation.
For background, see our guide to Delta 9 THC.

Independent testing also helps address a well-documented labeling problem. In a peer-reviewed study of online CBD products,
researchers found that many were inaccurately labeled for cannabinoid content:
Bonn-Miller MO, et al. “Labeling Accuracy of Cannabidiol Extracts Sold Online.” JAMA (2017).
Read the study.

How Third-Party Testing Works (From Batch to COA)

1. A batch is produced (flower, extract, edible, topical, etc.).
2. A sample is collected and submitted to an independent lab (sampling method can affect results).
3. The lab runs validated methods (commonly HPLC for cannabinoids; other methods vary by analyte).
4. A COA is issued with results, dates, and identifiers (batch/lot number, sample ID).
5. The brand publishes or provides the COA, ideally tied to the exact batch you can buy.

A practical rule: a COA is most useful when it’s batch-specific and easy to match to the product in your hand.
If you can’t find a lot number match—or the COA is outdated—ask the brand for the correct report.

Quick COA Checklist (60 seconds)

COA Item	What to Look For	Why It Matters
Batch/Lot number	Matches your product label	Confirms the COA applies to what you bought
Test date	Recent and relevant to the batch	Older COAs may not represent current inventory
Cannabinoid potency	CBD/CBG/THC values align with the label	Supports accurate dosing and labeling integrity
Delta-9 THC	Reported clearly (often % and/or mg/g)	Key compliance marker for hemp definition
Contaminant panels	“Pass” results with stated limits	Reduces risk of avoidable exposure

Benefits: Trust, Safety Screening, and Better Label Accuracy

1) Consumer trust through transparent documentation

In hemp, trust is earned with receipts—COAs are one of the most concrete receipts available.
Shoppers comparing products (whether they’re learning about CBG or exploring new formats)
can verify potency and screening results instead of relying on marketing claims.

2) Safety screening for common contaminants

Hemp is a bioaccumulator, meaning it can absorb certain compounds from its growing environment.
That’s a reason many brands choose to screen for heavy metals and pesticides, and why extract-based products often include
residual solvent testing as well. A COA cannot guarantee “risk-free” products, but it can show whether a batch met the lab’s
stated limits for the analytes tested.

3) More consistent products and fewer surprises

Reliable potency data helps brands dial in formulations and helps customers dose more consistently.
This is particularly relevant for products where small differences in potency can change the user experience.
For related education, see terpenes and strain profiles.

Who Third-Party Lab Testing Helps Most

• First-time hemp shoppers who want a simple way to verify product legitimacy.
• Experienced users who compare cannabinoid profiles and want batch-to-batch consistency.
• People with sensitivity concerns who prioritize contaminant screening and clear labeling.
• Retailers who need documentation to support responsible merchandising decisions.

If you’re shopping for hemp online, prioritize brands that make COAs easy to find and clearly tied to each batch.
You can browse Wild Orchard Hemp’s lab-tested products in our shop.

Wild Orchard Hemp’s Commitment to Lab-Tested Transparency

At Wild Orchard Hemp, we treat third-party lab testing as a core quality practice—not a marketing add-on.
We work with independent labs and publish batch-level COAs so customers can verify cannabinoid potency and review
available safety screening results before they buy.

If you’re learning how to choose the right product strength, our educational guides can help, including
consumption methods and dosing guidance.

FAQs

What is a Certificate of Analysis (COA)?

A Certificate of Analysis (COA) is a lab report for a specific batch that lists cannabinoid potency and, when included,
results for contaminant screening (such as heavy metals, pesticides, microbes, or residual solvents).

How is third-party testing different from in-house testing?

Third-party testing is performed by an independent lab not controlled by the brand, which helps reduce conflicts of interest.
In-house testing can be useful for internal R&D, but it’s not the same as independent verification.

Does a COA prove a product is legal?

A COA can support compliance by showing reported cannabinoid levels (including Delta-9 THC) for a batch, but
legality depends on your state’s rules, product type, intended use, and how regulators interpret applicable laws.
When in doubt, check local regulations or consult qualified counsel.

What should I check first when reading a COA?

Start by matching the batch/lot number to your product label, then review the test date,
cannabinoid potency, and any contaminant panels shown as pass/fail with stated limits.

Can I request COAs from hemp brands?

Yes. Reputable brands typically post COAs online or provide them on request. If a brand cannot provide a batch-specific COA,
consider that a transparency red flag.

References

• Bonn-Miller MO, et al. (2017). Labeling Accuracy of Cannabidiol Extracts Sold Online. JAMA.
  https://jamanetwork.com/journals/jama/fullarticle/2661569
• Agriculture Improvement Act of 2018 (2018 Farm Bill), Pub. L. 115–334.
  https://www.congress.gov/bill/115th-congress/house-bill/2

About the Author

Taylor Moss is an award-winning freelance journalist focused on sustainable hemp farming and innovative product trends.
Drawing from 12 years of experience, Taylor emphasizes trust, potency, and ethical sourcing in the cannabis space.

Disclaimer

This article is for educational purposes only and does not provide medical or legal advice. Hemp-derived products may affect people differently.
Consult a qualified healthcare professional before using hemp products—especially if you are pregnant or nursing, have a medical condition,
or take medications. Always follow local laws and review product labels and COAs.