Different samples have different expiration dates. In general, stool and blood (from blood draw) have shorter viability, and we would suggest that you collect those later than some other samples such as urine and Dried Blood Spot (DBS).
Please see list below for guidance on sample viability:
- Hair – No expiration date
- Buccal Swab for DNA Methylation – 2 months
- Saliva for Hormones Test – 2 months (frozen)
- Urine* – 30 days (frozen)
- Dried Blood Spot (DBS) – 21 days
- Stool – 5 days after day 2 collection
- Blood Draw (all types) – Ship immediately on the same day
*Urine – Porphyrins Test is viable for 14 days (frozen)