Calcium + Magnesium

Test Details

Lab Company: Mosaic Diagnostics 
Sample Type: Urine 
Collection Location: At Home

This test measures calcium and magnesium in the urine. It is a useful alternative to a blood test.    

🔑 Key Details 📦 Shipping
Preparation & Timing 📊 Results
🧪 Collection Instructions 📚 More Resources
💳 Requisition & Payment
💬 Questions?

Key Details 

  • Do not collect your sample while menstruating. 
  • You will collect your sample upon waking. 
  • Freeze your sample before shipping.
  • Your sample may only be shipped Monday through Thursday. 
  • DO NOT register your kit online.

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Preparation & Timing

  • Save the cardboard test kit box - you will use this to ship back your sample.
  • If your practitioner has ordered Mosaic Diagnostics tests with multiple sample types, consult THIS DOCUMENT to determine the order in which you should collect your samples.
  • DO NOT collect your sample while menstruating.
  • The day of collection 
    • You will collect your sample upon waking.
    • DO NOT eat or drink prior to collecting your sample. 

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Collection Instructions

  1. Collect your first morning urine in the provided collection cup. 
    1. Collect prior to eating or drinking. 
    2. You will need a minimum of 10 mL for each urine test ordered.
  2. Screw the collection cup lid on tightly.
  3. Write the following information on the barcode stickers.
    1. Your full name
    2. Date of collection 
    3. Time of collection 
  4. Check the box "Check if Frozen" on the barcode stickers.
  5. Place a barcode sticker on the collection cup.
  6. Place the following items into the freezer.
    1. Collection cup
    2. Provided gel pack (lay it flat!)
  7. The sample and gel pack should remain in the freezer for a minimum of 4 hours prior to shipping.
    1. Keep them in the freezer until ready to ship.
    2. Your frozen sample is only viable for 30 days after collection.
  8. Complete the test requisition form following the directions HERE.
    1. DO NOT register your kit online.
  9. When you are ready to ship your sample, place the collection cup into the biohazard zip-lock bag along with the absorbent sheet.
  10. Place the frozen gel pack and the sample into the silver thermo bag.
  11. Place the silver thermo bag into the cardboard test kit box.
    1. If the sample is not in the box, it will be rejected by UPS.
  12. Place the completed test requisition form into the box and close the lid.

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Requisition & Payment

  • Your kit has been prepaid. You DO NOT need to pay anything extra.
  • Instructions on how to fill out your requisition can be found HERE.
    • Since you pre-paid for your tests, you do not need to fill in the payment information on this form.
    • DO NOT register your kit online.

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  • Your sample must be frozen for a minimum of 4 hours prior to shipping.
  • To prepare your sample for shipping,    
    • Place the collection cup into the biohazard zip-lock bag. 
      • Ensure the absorbent sheet is in the bag as well. 
    • Place the frozen gel pack into the silver thermo bag.
    • Place the biohazard zip-lock bag into the silver thermo bag.
    • Place the silver thermo bag into the cardboard box. 
    • Place the completed test requisition form into the box.
    • Seal the cardboard box. 
    • Place the cardboard box into the provided UPS Laboratory Pak.
    • Seal the Laboratory Pak.
  • Make a note of your tracking number (found on the Return Label) so that you can track your sample back to the lab. 
  • Ship via UPS, Monday - Thursday only.
    • You can take your sample to the nearest UPS location.
    • DO NOT place your sample in a UPS drop box. 
    • You can also schedule a UPS pickup by calling 1 (800) 742-5877.

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  • Results should be released to your provider 2-3 weeks after your sample is received at the lab. We cannot guarantee processing time. 
  • Your provider will notify you when your results are in and schedule a follow-up appointment for you to review them together. 

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More Resources

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For general questions, email Rupa Health at For test-specific questions, contact Mosaic Diagnostics by calling 1-800-288-0383 or emailing