Third Party Testing

100% Transparency—Every Batch, Every Time

At Darko, transparency is our promise. We believe that you have the right to know exactly what’s in your supplements—and that’s why every single batch of our 8 premium formulas undergoes rigorous third-party testing by ISO-accredited, independent labs. No exceptions, no shortcuts.

Our third-party testing ensures that our products meet our strict standards for purity, potency, and safety. We test for active ingredient potency, contaminants, heavy metals, and adulteration—so you can trust that what’s on the label is exactly what’s in the bottle.

What We Test For

Every Darko supplement batch is tested for the following criteria, by an independent third-party lab:

• Active Ingredient Potency: Verify that the amount of each active ingredient matches the label claim (no under-dosing or over-dosing).
• Contaminants & Microbials: Test for harmful bacteria (E. coli, salmonella, staph), mold, yeast, and other microbial contaminants.
• Heavy Metals: Test for lead, arsenic, mercury, cadmium, and other heavy metals (meets or exceeds FDA and California Prop 65 standards).
• Adulteration: Test for unlisted ingredients, banned substances, and synthetic additives (no hidden fillers).
• Purity: Test for residual solvents, pesticides, and other unwanted chemicals (all ingredients are pesticide-free and solvent-free).
• Label Accuracy: Verify that all ingredients (active and inactive) are correctly listed on the label, with no hidden proprietary blends.

Our Testing Process

Our third-party testing process is rigorous and comprehensive, with multiple quality control checks at every stage of production:

1. Raw Ingredient Testing: All raw ingredients are tested before production, to ensure they meet our purity and potency standards.
2. In-Process Testing: We conduct in-process testing during manufacturing, to ensure consistent quality and formulation.
3. Finished Product Testing: Every batch of finished product is sent to an independent third-party lab for full testing (no batch is released without a passing test report).
4. Test Report Review: Our quality control team reviews all third-party test reports, and only batches that pass all criteria are shipped to customers.
5. Test Report Publication: All third-party test reports are published on our website—you can view the test report for any Darko product batch by entering the batch number (found on the product bottle) in our test report portal.

Our Independent Testing Partners

We partner with leading ISO-accredited, independent labs in the USA to conduct our third-party testing. Our testing partners are fully certified and follow strict GLP (Good Laboratory Practice) guidelines, ensuring accurate, reliable test results.

Our labs are independent of Darko—they have no financial or operational ties to our company, so their test results are completely unbiased and objective.

View Our Test Reports

You can view the third-party test report for any Darko product batch at any time—transparency is non-negotiable for us.

To view a test report: 1. Locate the batch number on your Darko product bottle (printed on the bottom/back label). 2. Visit our website and navigate to the "Third Party Testing" portal (under the Links menu). 3. Enter the batch number and product name—your test report will be displayed as a PDF (includes all test results and lab certification).

If you need help finding a test report, or if you would like a copy of a test report sent to your email, contact our customer support team at darko@darko.company.

Our Commitment to Quality

Third-party testing is just one part of our commitment to quality. All Darko products are manufactured in FDA-registered, GMP-certified (Good Manufacturing Practice) facilities in the USA, with strict quality control at every stage of production.

We never cut corners on quality—our mission is to provide you with the purest, most effective, and most transparent supplements on the market. When you choose Darko, you choose a brand that you can trust.