Testing & Diagnostics
ZRT Saliva 4-Point Cortisol (S-120)
ZRT Laboratory
Mail-in saliva kit: you collect 4 saliva samples across one day (morning, noon, evening, night) and mail them to ZRT's lab, which reports free cortisol at each time point against its ranges in a graph. Price: $119 (checked Oct 2, 2026). Related kits: S-121 Adrenal Stress (adds DHEA-S) $143; S-122 Cortisol Awakening Response (6 tubes) $175. Lab: CLIA-certified (ZRT Laboratory, Beaverton, OR; confirmed in CMS CLIA records, 38D0960950). Doctor's order not included; state rules vary. Availability: ZRT's shipping policy blocks orders to New York and Maryland; California orders need authorization from a California-licensed provider. Results 5-7 business days after the lab receives samples. HSA/FSA: not stated. Directory: Testing & Diagnostics > Hormone tests.
Links go to the maker. Affiliates are off. BiohackList may earn commissions from qualifying purchases in the future.