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Homocysteine (add-on only)-Cell Science Kit:

Note: This is a test kit that will be mailed to you and requires a blood draw. It is your responsibility to arrange the blood draw for your kit.


Coupon Codes not valid for this testing.

Fasting Required: No
Lab: Cell Science Systems
Specimen: Blood
Results: Average processing time 10-12 business days
Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Medication and Supplement Instructions for CSS Testing:
  • Testing does not need to be delayed because of medication or supplement use.
  • Medications that are part of your daily routine should be continued as they are considered part of your normal physiological state.
  • If possible, please avoid taking any oral medications, IV infusions, intramuscular (IM) injections, or oral supplements for 4 hours before blood draw.
  • If you are taking medications that may impact white blood cell counts, it is recommended to collect an additional blood tube at the time of your draw.
  • For short term medications (such as antibiotics) that will be discontinued, it is best to wait at least 2 weeks after completing the medication before completing your blood draw.
  • If you are taking methylene blue, it is recommended to wait at least 72 hours after your last dose before proceeding with your blood draw for the Cellular Nutrition Assay.
  • Fasting is not necessary


Description: Homocysteine is a precursor in the biosynthesis of L-cysteine for glutathione; glutathione is important for the detoxification of electrophilic compounds (metals).