Kratom Urine Drug Test Strip for 7-OH – KRA/500

Kratom Urine Drug Test Strip for 7-OH Screening

This Serenity KRA Test kratom urine drug test strip provides a qualitative, preliminary screen for kratom-related alkaloids in human urine. Unlike a general drug panel, this assay is calibrated specifically to 7-hydroxymitragynine at 500 ng/mL. Its insert also lists positive reactivity to mitragynine at 6,000 ng/mL.

The strip is labeled Forensic Use Only. It is not presented as a home diagnostic test, a CLIA-waived clinical test or a DOT drug test.

Key Features

• Calibrated to 7-hydroxymitragynine at 500 ng/mL
• Listed mitragynine response level of 6,000 ng/mL
• Human urine specimen
• Qualitative, presumptive immunoassay
• Preliminary result read at 5 minutes
• Do not interpret after 10 minutes
• 25 strips per canister
• Forensic Use Only
• Quantity pricing available on the product page

Verified Serenity KRA Test Specifications

What Does the KRA/500 Strip Detect?

For this exact model, KRA/500 refers to a 7-hydroxymitragynine-calibrated urine screen with a 500 ng/mL cutoff. The insert’s specificity table also lists mitragynine as producing a positive response at 6,000 ng/mL.

This distinction matters because KRA assays are not necessarily identical. Another strip, cartridge or multi-panel cup may use a different calibrator, cutoff or cross-reactivity profile. Always compare the product code and current insert before use.

The test does not quantify the amount present. It cannot determine whether a person used natural kratom leaf or a concentrated 7-OH product, which compound caused the preliminary response, the dose, the time of use or whether the person is impaired.

For a detailed explanation, read What Is 7-OH? Kratom, Drug Testing and the 2026 Federal Update.

Forensic Use Only

The KRA-U12 strip is labeled Forensic Use Only. Organizations are responsible for determining whether that classification is appropriate for their program and jurisdiction.

Do not use this product page to claim:

• CLIA-waived status;
• FDA clearance for home or clinical diagnosis;
• compliance with DOT testing requirements;
• proof of intoxication or impairment; or
• definitive identification without confirmation.

How to Use the KRA Urine Test Strip

Follow the current package insert supplied with the product.

1. Bring the strip and urine specimen to room temperature, 15-30°C.
2. Remove one strip from the canister and use it promptly. Close the canister tightly.
3. Hold the printed end and avoid touching the membrane.
4. Dip the strip vertically in the urine specimen for at least 10-15 seconds. Do not immerse beyond the MAX line.
5. Remove the strip and place it on a flat, non-absorbent surface.
6. Read the colored lines at 5 minutes. Do not interpret the result after 10 minutes.

Use a clean, dry urine collection container. The insert specifies human urine and does not authorize testing beverages, powders, product contents or other liquids.

How to Read KRA Strip Results

Negative

Two colored lines appear: one control line (C) and one test line (T). A faint test line is still interpreted as negative when the control line is present, subject to the insert.

Preliminary Non-Negative

The control line appears and the test line does not. The manufacturer’s insert describes this as positive, but it is a preliminary screening result and requires appropriate laboratory confirmation.

Invalid

No control line appears. Discard the test, review the procedure and repeat with a new strip.

Test Limitations and Confirmation

This test is qualitative and preliminary. It does not report concentration, dose, frequency of exposure, time of use or impairment. A negative result does not rule out exposure because an analyte may be below the assay’s response level or outside the period in which it is detectable in the specimen.

Incorrect timing, insufficient specimen volume, contamination, adulteration, improper storage or an expired device may produce unreliable results. Check the expiration date and canister condition before testing.

A preliminary non-negative result should be confirmed using an appropriate definitive laboratory method and reviewed according to the testing program’s written procedures.

Forensic Use Only

The KRA-U12 strip is labeled Forensic Use Only. Organizations are responsible for determining whether that classification is appropriate for their program and jurisdiction.

Do not use this product page to claim:

• CLIA-waived status;
• FDA clearance for home or clinical diagnosis;
• compliance with DOT testing requirements;
• proof of intoxication or impairment; or
• definitive identification without confirmation.

Strip, Cartridge or Multi-Panel Cup?

Bulk KRA Test Strip Ordering

The product page displays quantity-based pricing for KRA strips. Organizations planning a large order should confirm current inventory, lot expiration dates and that the supplied canister is model KRA-U12 before ordering. Contact DrugTestingCup for distributor quantities or documentation questions.

Frequently Asked Questions

What does this kratom urine drug test strip detect?

The KRA-U12 insert identifies 7-hydroxymitragynine as the calibrator at a 500 ng/mL cutoff and lists mitragynine positive reactivity at 6,000 ng/mL.

Does the KRA/500 strip directly detect 7-OH?

Yes. This exact model is calibrated to 7-hydroxymitragynine at 500 ng/mL in human urine.

Can the strip distinguish 7-OH from mitragynine?

No. The immunoassay responds to the compounds at the levels listed in its insert, but a preliminary result does not definitively identify which compound produced the response.

How quickly should the result be read?

Read the result at 5 minutes. Do not interpret it after 10 minutes.

What does a faint test line mean?

Any visible test line is interpreted as negative when the control line is present, subject to the current product insert.

Is this a home or CLIA-waived test?

No. The KRA-U12 insert labels the device Forensic Use Only.

Does a preliminary non-negative result prove impairment?

No. The strip does not measure impairment, dose, frequency or time of use. A preliminary non-negative result requires appropriate laboratory confirmation.

How accurate is the KRA-U12 strip?

The manufacturer insert reports greater than 97% agreement with commercially available tests at the same cutoff in the comparison it describes. This is not the same as claiming perfect or definitive accuracy, and screening results remain subject to the insert’s limitations and confirmation requirements.