Bayer Ketostix Urinalysis Ketone Test Strips (50 Tests)

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Bayer Ketostix Urinalysis Ketone Test Strips (50 Tests)

Bayer Ketostix are rapid urine ketone reagent strips for quick, at-home or point-of-care screening. Each single-use strip features a ketone-specific test pad that reacts with acetoacetic acid in urine, producing a clear colour change you compare against the bottle chart. Results are available in about 15 seconds, helping you monitor ketosis during illness or dietary programs, or flag rising ketones that may require clinical advice. The 50-strip vial includes a desiccant to protect integrity between uses.

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Active Reagents / Test Principle

• Sodium nitroprusside (nitroprusside reaction) with buffer system — detects acetoacetic acid; colour shifts from beige to pink/purple in proportion to ketone concentration.

• Absorbent test pad & backing on a plastic strip for dip-and-read convenience.
  Note: Does not measure blood β-hydroxybutyrate (BHB); urine acetone is detected poorly. These are urine strips, not blood ketone tests.

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Reasons to Use

• Diabetes sick-day monitoring to check for rising ketones when unwell, under professional guidance.

• Tracking nutritional ketosis during low-carb/ketogenic diets or fasting programs.

• Quick checks for pregnancy-related or exercise-related ketonuria when advised by a clinician.

• Fast, simple workflow: dip → wait ~15 sec → compare to chart; no meter required.

Reasons Not to Use

• Do not use to make treatment decisions without professional advice, especially if symptomatic (nausea, vomiting, abdominal pain, rapid breathing, confusion).

• Do not use expired, uncapped, moisture-exposed, or discoloured strips.

• Not for blood testing; not a substitute for blood BHB monitoring when clinically indicated.

• Heavily pigmented urine or certain medications/dyes can affect readability—seek guidance if results seem inconsistent.

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Advantages

• Rapid visual result (~15 seconds).

• Easy dip-and-read method; no instrumentation.

• Economical 50-test vial with desiccant for reliability.

• Helpful trend tool alongside symptoms and professional care plans.

Disadvantages

• Semi-quantitative (colour scale); not an exact concentration.

• Primarily detects acetoacetate, not the predominant blood BHB in some clinical states.

• Susceptible to storage/handling and sample interferences.

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Frequently Asked Questions (FAQ)

Q: What do Ketostix measure?
A: Urine acetoacetic acid (ketone) via the nitroprusside reaction. Read against the bottle chart as Negative, Trace, Small, Moderate, or Large.

Q: How do I use a strip correctly?
A: Collect a fresh urine sample. Briefly dip the test pad, remove immediately, and wipe the edge on the container to remove excess. Hold horizontally and read at ~15 seconds by matching the pad to the colour chart. Do not interpret after the time window stated on the label.

Q: When should I test?
A: Follow your care plan. Common times include when unwell, if blood glucose is running high (for people with diabetes), or at set times during a keto/fasting regimen. First-morning urine is often more concentrated.

Q: What indicates a concerning result?
A: Moderate to large ketones, rising readings, or any ketones with symptoms (nausea, vomiting, abdominal pain, rapid breathing, confusion) warrant urgent medical advice.

Q: Why do my urine results differ from blood ketone tests?
A: Urine strips reflect acetoacetate and can lag behind blood changes. Blood meters measure β-hydroxybutyrate (BHB)—the predominant blood ketone.

Q: What causes false results?
A: False positives: strong urine pigments, some drugs/dyes, oxidising contaminants (e.g., bleach in containers).
False negatives/low readings: very dilute urine, prolonged sample standing (ketones degrade), or testing outside the time window.

Q: How should I store the strips?
A: Keep tightly capped with the desiccant in the original vial, at room temperature, dry, and away from light/heat. Do not refrigerate or freeze. Use before expiry and within the in-use period after opening.

Q: Can I touch the pad or cut the strip?
A: No. Oils/moisture from fingers and cutting can impair accuracy. Strips are single-use.

Q: Do I need controls?
A: For clinical settings, follow your facility’s quality control protocol. For home use, carefully follow the instructions and discuss unexpected results with your health professional.

Q: Are they suitable for children or pregnancy?
A: Use only under professional guidance for children or during pregnancy.

ALWAYS READ THE LABEL ON THE PRODUCT AND FOLLOW THE DIRECTIONS FOR USE UNLESS DIRECTED BY YOUR HEALTHCARE PROFESSIONAL.

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