ZProtein 5lbs Third-Party Lab Test
ZPROTEIN Lab Test Results: 77.8% Protein and Less Than 0.1% Lactose
ZPROTEIN has been independently tested by an ISO/IEC 17025-accredited laboratory in California. The Certificate of Analysis reports 77.8 grams of protein per 100 grams of powder and less than 0.1 gram of lactose per 100 grams. Based on the tested serving size of 32 grams, this equals approximately 24.9 grams of protein and less than 0.032 gram of lactose per serving.
Key ZPROTEIN laboratory results
| Test information | Reported result |
|---|---|
| Product tested | Z-PROTEIN |
| Flavor/sample description | Chocolate-flavored brown powder |
| Lot number | 1500 |
| Serving size | 32 grams |
| Protein result | 77.8 g per 100 g |
| Calculated protein per 32 g serving | Approximately 24.9 g |
| Lactose result | Less than 0.1 g per 100 g |
| Calculated lactose per 32 g serving | Less than 0.032 g |
| Sample received | April 15, 2026 |
| Certificate date | May 4, 2026 |
| Sample ID | M2502212682 |
| Laboratory order number | L2502218982 |
| Laboratory | Tentamus California |
| Laboratory accreditation | ISO/IEC 17025 |
These figures are taken directly from the Certificate of Analysis issued for the submitted ZPROTEIN sample.
What did the ZPROTEIN laboratory test confirm?
The laboratory analysis confirmed two important product characteristics:
- ZPROTEIN contained 77.8 grams of protein per 100 grams of powder.
- The lactose concentration was below 0.1 gram per 100 grams of powder.
For a tested serving size of 32 grams, the laboratory result converts to approximately:
- 24.9 grams of protein per serving
- Less than 0.032 gram of lactose per serving
The calculation for protein is:
77.8 g × 32 g ÷ 100 g = 24.896 g protein
Rounded to one decimal place, the tested sample contained approximately 24.9 grams of protein per 32-gram serving.
For lactose:
Less than 0.1 g × 32 g ÷ 100 g = less than 0.032 g lactose
This means the tested sample contained a very low amount of lactose—below the laboratory’s reported quantification level.
ZPROTEIN protein content: 77.8 grams per 100 grams
The laboratory measured the protein content of ZPROTEIN using the Kjeldahl technique, with the method reference listed as AOAC 2001.11, modified.
The Kjeldahl method is a recognized laboratory procedure used to determine nitrogen content and calculate the protein concentration of food and nutritional products.
The reported result was:
Protein: 77.8 g/100 g
This means protein represented approximately 77.8% of the tested powder by weight.
Because the submitted serving size was 32 grams, the result corresponds to approximately 24.9 grams of protein in each 32-gram serving.
Direct answer
How much protein was found in the tested ZPROTEIN sample?
The laboratory found 77.8 grams of protein per 100 grams, equal to approximately 24.9 grams of protein per 32-gram serving.
ZPROTEIN lactose result: less than 0.1 gram per 100 grams
The laboratory tested ZPROTEIN for lactose using gas chromatography with flame ionization detection, commonly identified as GC-FID.
The reported lactose result was:
Lactose: less than 0.1 g/100 g
The laboratory certificate lists a limit of quantification, or LOQ, of:
0.1 g/100 g
Therefore, the amount of lactose in the submitted sample was below the quantity the method could reliably measure and report numerically.
For a 32-gram serving, the result represents:
Less than 0.032 gram of lactose per serving
That is equivalent to less than 32 milligrams of lactose per 32-gram serving.
Direct answer
How much lactose was detected in ZPROTEIN?
The tested ZPROTEIN sample contained less than 0.1 gram of lactose per 100 grams, equivalent to less than 0.032 gram, or 32 milligrams, per 32-gram serving.
The laboratory result should be described precisely as “less than 0.1 g/100 g” rather than as absolute zero, because the result was below the test method’s quantification limit.
Who tested ZPROTEIN?
The Certificate of Analysis was issued under the Tentamus California laboratory network. https://www.tentamus.com/tentamus-california-labs/
The document states that the testing was performed at an ISO/IEC 17025-accredited Tentamus laboratory. ISO/IEC 17025 is an international standard covering the competence, consistency and quality systems of testing and calibration laboratories.
The certificate was digitally signed and certified by:
Adamson Analytical Laboratories, Inc.
The certificate date was May 4, 2026, and the sample was received by the laboratory on April 15, 2026.
This was a laboratory analysis of the submitted ZPROTEIN sample identified as:
- Sample ID: M2502212682
- Lot number: 1500
- Description: Chocolate-flavored brown powder
- Serving size: 32 grams
Why independent laboratory testing matters for protein powder
Protein powder buyers often see nutritional claims printed on product labels. A third-party Certificate of Analysis provides additional verification by reporting what was measured in an actual submitted sample.
For ZPROTEIN, the laboratory report provides measurable data for two product characteristics frequently considered by whey protein consumers:
Verified protein concentration
The laboratory reported 77.8% protein by weight, providing an independent reference point for the amount of protein in the tested sample.
Very low measured lactose
The lactose result was below 0.1 gram per 100 grams, indicating that the submitted sample contained only a minimal amount of measurable lactose.
Identifiable production lot
The report identifies lot number 1500, allowing the test result to be connected to a specific submitted production lot rather than functioning as a general, unsupported marketing statement.
Recognized test methods
The certificate identifies the analytical techniques and method references used for both protein and lactose testing. This makes the report more transparent and easier to evaluate.
Understanding the difference between label claims and laboratory results
A nutrition label presents the manufacturer’s declared values using required serving-size and rounding rules. A laboratory report presents the measured result for a particular submitted sample.
Small differences may occur because of:
- Permitted label rounding
- Normal manufacturing variation
- Flavoring and ingredient variation
- Differences between analytical methods
- Moisture content
- Sampling conditions
For the ZPROTEIN sample tested, the measured protein result was approximately 24.9 grams per 32-gram serving before nutritional-label rounding.
The result applies specifically to the sample and lot submitted for testing. The certificate itself states that test results apply only to the tested sample and are not automatically representative of other samples, production runs or lots.
ZPROTEIN laboratory test summary
The May 4, 2026 Certificate of Analysis provides the following verified information:
- ZPROTEIN lot 1500 was tested by an ISO/IEC 17025-accredited laboratory.
- The submitted sample was chocolate-flavored powder.
- The serving size listed for testing was 32 grams.
- Protein content was 77.8 grams per 100 grams.
- Calculated protein content was approximately 24.9 grams per serving.
- Lactose was less than 0.1 gram per 100 grams.
- Calculated lactose was less than 0.032 gram per serving.
- Protein was tested using the Kjeldahl technique.
- Lactose was tested using GC-FID.
The key conclusion is straightforward:
The tested ZPROTEIN sample delivered approximately 24.9 grams of protein per 32-gram serving while containing less than 32 milligrams of lactose per serving.
Frequently asked questions
Is ZPROTEIN independently laboratory tested?
Yes. The submitted ZPROTEIN sample was tested through Tentamus California at an ISO/IEC 17025-accredited laboratory. The Certificate of Analysis was dated May 4, 2026.
How much protein is in ZPROTEIN?
The tested sample contained 77.8 grams of protein per 100 grams of powder. Based on a 32-gram serving, this equals approximately 24.9 grams of protein per serving.
How much lactose is in ZPROTEIN?
The laboratory reported lactose at less than 0.1 gram per 100 grams. This equals less than 0.032 gram, or 32 milligrams, per 32-gram serving.
Is the lactose level exactly zero?
The laboratory did not report absolute zero. It reported a result of less than 0.1 g/100 g, meaning the lactose concentration was below the method’s limit of quantification.
What method was used to test ZPROTEIN protein?
Protein was analyzed using the Kjeldahl technique, with the certificate referencing AOAC 2001.11, modified.
What method was used to test lactose?
Lactose was analyzed using GC-FID, or gas chromatography with flame ionization detection.
Which ZPROTEIN lot was tested?
The Certificate of Analysis identifies the tested product as Z-PROTEIN, lot number 1500.
When was the ZPROTEIN sample tested?
The sample was received on April 15, 2026, and the laboratory certificate was issued on May 4, 2026.