The linked GCMS hormone-metabolite and LCMS diurnal-hormone I instructions are for dried-urine collection. A closely matched store test is the U-342 Advanced Neurotransmitter & Diurnal Hormone Test, which lists four timed dried-urine collections. If the code on your kit differs, use the instructions supplied for that exact panel.
Why are there four collection times?
The U-342 product page describes a 42-marker panel that combines urinary neurotransmitters and related metabolites with diurnal hormone measurements. Four timed samples are collected on the designated day, and the resulting report includes daily hormone curves. The four collections are separate timed specimens, not one sample to combine.
Prepare before collection
Read the full PDF and confirm the collection day and timetable before you begin. Food, drink, nicotine, medicines and supplements may affect urinary results. The U-342 product page notes that the laboratory guidance may include avoiding alcohol, nicotine and certain foods, including bananas, pineapple and walnuts, for a specified period. Follow the exact restrictions and timing in your kit instructions rather than applying a general rule from another test.
Record all medicines and supplements on the requisition form. Do not stop prescribed medication or change treatment unless your prescribing clinician advises you to. If you are pregnant, breastfeeding, under 18, have kidney disease or are receiving treatment for a diagnosed condition, the product page recommends discussing suitability with a healthcare professional before ordering.
Collect and dry the samples
At each time listed in the PDF, collect the dried-urine sample using the supplied filter card and the method shown in your kit instructions. Keep each timed collection separate and follow the guide for any labels or paperwork. Allow the cards to dry fully before packaging them. The exact collection times and handling steps are in the PDF, so keep it with your kit throughout the collection day.
Return the kit and receive results
Once all cards are dry, package them with the completed requisition and return them according to the kit’s instructions. The U-342 product page says results are normally emailed within 3–5 working days after the laboratory receives the samples.
Explore dried urine tests
Browse the Dried Urine Spot Tests collection or read the U-342 test details. Urinary findings describe substances excreted in urine; they do not directly measure neurotransmitter activity in the brain or diagnose a condition. Discuss results with a qualified healthcare professional.
This article is general sample-collection information, not medical advice, diagnosis or treatment guidance. Follow the instructions supplied with your kit and ask your clinician or laboratory if anything is unclear.