No products in the cart.
Third-Party TestedHealth Level One Inc. · July 28, 2026
92.77 mg/mLEGCG (Epigallocatechin gallate)
140.78 mg/mLTotal Polyphenols
Every production lot of Chi Tea is independently tested to verify key quality measurements. We believe customers should be able to review the same laboratory information we do before choosing a supplement. The current Certificate of Analysis for Chi Tea Ultimate Green Tea was issued by Health Level One Inc. on July 28, 2026, and its results are published in full below — as readable text, not only as a PDF. Prior certificates remain available in our lab report archive.
2026 Certificate of Analysis — Laboratory Results
| Test | Result |
|---|---|
| Certificate Date | July 28, 2026 |
| Laboratory | Health Level One Inc. · Hauppauge, NY |
| Product | Chi Tea Ultimate Green Tea |
| EGCG (Epigallocatechin gallate) | 92.77 mg/mL |
| Total Polyphenols | 140.78 mg/mL |
| Lot Number | 26061801 |
| Sample Received | July 22, 2026 |
| Lab Control Number | CH14045226 |
| EGCG Method | HPLC (SOP-TP-18) |
| Polyphenol Method | UV-VIS spectrophotometry (SOP-TP-17) |
Values are taken directly from the Certificate of Analysis dated July 28, 2026. Results are reported per millilitre of liquid extract; the 92.77 mg/mL EGCG figure is consistent with the 76 mg of EGCG per 30-drop serving stated on the product label.
What These Results Mean
What is EGCG?
EGCG, or epigallocatechin gallate, is the most abundant and most studied catechin in green tea. It is the compound most green tea research is actually about, and it is the single most useful number on a green tea Certificate of Analysis, because it tells you how much of the active constituent is present rather than simply how much green tea material is in the bottle. At 92.77 mg/mL, the 2026 lot is a concentrated liquid extract rather than a brewed beverage. You can read more in our guide to the science of green tea extract, purity and potency.
What are polyphenols, and why do they matter?
Polyphenols are the broader family of plant compounds that catechins such as EGCG belong to. Where the EGCG figure measures one specific molecule, the total polyphenol figure — 140.78 mg/mL in the 2026 lot — measures the full antioxidant fraction of the extract. Reading the two numbers together is what tells you the extract is both potent in its headline compound and broad in its overall polyphenol profile, instead of being spiked to hit a single marketing number.
Why standardized testing matters
Green tea is an agricultural product. Leaf chemistry shifts with cultivar, harvest, growing season and extraction method, so two bottles that carry identical label copy can differ substantially in what they actually deliver. Standardized testing — here, HPLC for EGCG and UV-VIS spectrophotometry for total polyphenols, each run against a documented laboratory method — produces a number that can be compared across lots, across years, and against other products. Without a published assay, “high potency” is a claim rather than a measurement.
Why independent labs matter
The dietary supplement category is not pre-approved by the FDA before it reaches shelves, which places the burden of verification on the manufacturer. A Certificate of Analysis from an outside laboratory removes us from our own grading. Health Level One Inc. received the sample, ran the assays and issued the certificate independently; we publish that certificate unedited, together with the lot number it covers, so that anyone — a customer, a practitioner, a retailer or a researcher — can check our claims against the underlying document.
Download the Official Report
The complete 2026 Certificate of Analysis is reproduced below and available for download.
View prior lab reports & Certificates of Analysis →
Lab Report Archive
We keep prior certificates online rather than replacing them, so the testing history stays open to inspection.
| Report | Laboratory | Product & Lot | What was tested |
|---|---|---|---|
| 2026 Certificate of AnalysisCurrent July 28, 2026 | Health Level One Inc. Hauppauge, NY | Chi Tea Ultimate Green Tea Lot 26061801 | EGCG (92.77 mg/mL); Total Polyphenols (140.78 mg/mL) |
| 2021 Certificate of Analysis January 20, 2021 | Eurofins Food Chemistry Testing US, Inc. | Chi Tea Pro Lot 2011165 | EGCG; caffeine; total polyphenols; heavy metals; fluoride; inorganic bromide; dithiocarbamates; 60+ pesticide multi-residue panel |
| March 2021 Laboratory Report March 2021 | Independent contract laboratory | Legacy formulation (pre-rebrand) | Archived scanned report retained for continuity of record |
Contaminant Screening — 2021 Eurofins Panel
Potency is only half of a purity question. The 2021 Eurofins Food Chemistry Testing US panel screened Chi Tea Pro (lot 2011165) for heavy metals, fluoride and a multi-residue pesticide screen. Those results are reproduced here because a Certificate of Analysis focused on potency, such as the 2026 report above, does not by itself speak to contaminants.
| Contaminant | Result | Notes |
|---|---|---|
| Lead | 16.2 ppb | Parts per billion |
| Arsenic | 13.2 ppb | Parts per billion |
| Cadmium | 5.54 ppb | Parts per billion |
| Mercury | <5.00 ppb | Below the reporting limit |
| Fluoride | 0.791 ppm | Parts per million |
| Total dithiocarbamates | <2.00 mg/kg | Below the reporting limit |
| Inorganic bromide | <125 mg/kg | Below the reporting limit |
| Pesticide multi-residue panel | Pass | 60+ compounds screened, all below detection limits |
Source: Eurofins Food Chemistry Testing US, Inc., report dated January 20, 2021, Chi Tea Pro lot 2011165. Contaminant screening is performed periodically rather than on every lot; the potency certificate above is the current lot-specific document.
Extract Standardization — Manufacturing Specification
Separate from the lot-specific laboratory results above, Chi Tea extracts are produced to a fixed manufacturing specification. These are the standards the raw extract is made to, not third-party assay results, and we list them separately so the distinction is clear.
| Specification | Standard | What it describes |
|---|---|---|
| Total Catechins | 80% standardized | Full-spectrum green tea catechin fraction of the extract solids. |
| Total Polyphenols | 95% standardized | Polyphenol fraction of the extract solids used in the formulation. |
| Solvent Residue | 0.00% | Steam-water extraction; no alcohol or chemical solvent carrier. |
Why We Publish Our Lab Reports
Transparency. A supplement label is a claim. A Certificate of Analysis is evidence. Publishing the certificate in full — including the lot number, the testing laboratory and the assay method — lets anyone verify the claim instead of taking it on trust.
Quality control. Testing is not only a marketing asset; it is how we find out whether a production run met its own specification. A lot that does not test to specification does not ship.
Consistency over time. Keeping an archive of prior certificates rather than deleting them shows whether potency holds up across years and formulations. A single report proves one batch; a record proves a process.
Third-party accountability. The laboratories that test Chi Tea have no stake in the result. That independence is the point, and it is why the certificate carries the laboratory’s own control number and signatory rather than ours.
Liquid Delivery vs. Capsules
Potency on a certificate and potency delivered to the body are different questions. The comparison below summarises why Chi Tea uses a pre-solubilized liquid format; the underlying evidence is set out in our page on the science of liquid bioaccessibility.
| Performance Metric | ChiTea Liquid Protocol | Standard Capsules/Tablets |
|---|---|---|
| Absorption Rate | Up to 98% Bioavailable | 10% – 50% Bioavailable |
| Time to Assimilation | 1 – 4 Minutes | 20 – 30+ Minutes |
| Digestive Effort | Zero (Pre-solubilized) | High (Requires breakdown of binders/fillers) |
| Systemic Reach | Mucosal & Sublingual Entry | Lower GI Tract Only |
| Potency Retention | Full Spectrum Standardized | Variable (Degradation during compression) |
Comparative data based on the Physicians’ Desk Reference (PDR) regarding liquid vs. solid pharmaceutical delivery.
Frequently Asked Questions
Why does Chi Tea publish lab reports?
Because a supplement label is a claim and a Certificate of Analysis is evidence. Publishing the certificate in full — with the lot number, the testing laboratory, the assay method and the result — allows customers, practitioners and retailers to verify our potency claims against an independent document rather than taking our word for them.
What is EGCG?
EGCG stands for epigallocatechin gallate. It is the most abundant catechin in green tea and the compound most green tea research studies. On a Certificate of Analysis it is the clearest measure of a green tea extract’s active potency. The 2026 Chi Tea Ultimate Green Tea certificate reports 92.77 mg/mL of EGCG.
What are polyphenols?
Polyphenols are the wider family of plant antioxidant compounds that catechins such as EGCG belong to. The total polyphenol figure measures the whole antioxidant fraction of the extract rather than one molecule. The 2026 certificate reports 140.78 mg/mL of total polyphenols.
Which laboratory tested Chi Tea?
The current Certificate of Analysis was issued by Health Level One Inc. of Hauppauge, New York, on July 28, 2026, under lab control number CH14045226. EGCG was measured by HPLC and total polyphenols by UV-VIS spectrophotometry. Earlier contaminant and pesticide screening was performed by Eurofins Food Chemistry Testing US, Inc.
How often are Chi Tea products tested?
Potency is verified on a per-production-lot basis, and each certificate names the specific lot it covers — the current report covers lot 26061801. Broader contaminant and pesticide screening is performed periodically on the extract rather than on every lot.
Can laboratory values vary from lot to lot?
Yes. Green tea is an agricultural raw material, and catechin content varies with cultivar, harvest, growing conditions and extraction. Small lot-to-lot variation in EGCG and total polyphenol values is normal and expected. That is precisely why each lot is tested and why we publish the lot number alongside the result instead of quoting a single permanent figure.
What lot does the current certificate cover?
Lot 26061801 of Chi Tea Ultimate Green Tea. The sample was received by the laboratory on July 22, 2026 and the certificate was issued on July 28, 2026.
Continue reading: the Science of Green Tea: Purity, Potency & EGCG, the Science of Liquid Bioaccessibility, and the ChiTea Research & Science Library.