SKU: 57176235104

ZRT Cortisol Test

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Description

ZRT Cortisol TestTHIS TEST INCLUDES A 30 MINUTE CONSULTATION WITH ONE OF OUR DIETITIANS UNLESS THE "NO REVIEW" OPTION IS SELECTED During this consultation your consulting dietitian will email you the results of your test, go over the report, create a plan of action and answer any questions you may have. After purchasing a staff member of Vidal Coaching will contact you within 1 2 business days to acquire any additional information and to schedule your consultation.

THIS TEST INCLUDES A 30-MINUTE CONSULTATION WITH ONE OF OUR DIETITIANS UNLESS THE "NO REVIEW" OPTION IS SELECTED

During this consultation your consulting dietitian will email you the results of your test, go over the report, create a plan of action and answer any questions you may have.

After purchasing a staff member of Vidal Coaching will contact you within 1 – 2 business days to acquire any additional information and to schedule your consultation.

All Lab Sales are Final


SHIPPING INCLUDED*

*For U.S. order only. ADDITIONAL FEES MAY APPLY FOR INTERNATIONAL SHIPPING.*

 

 

Cortisol Patterning 

Cortisol is synthesized by the adrenal glands and released into the bloodstream in response to stress signals from the brain. In the bloodstream cortisol is mostly bound up by Cortisol Binding Globulin (CBG) and albumin, leaving only about 1-3% bioavailable to enter tissues and invoke a biological response. The bioavailability of cortisol can vary considerably due to different levels of CBG; liver synthesis of CBG is controlled by various hormones, such as estrogens, thyroid, and cortisol itself. Salivary cortisol reflects the amount of cortisol that escapes binding proteins, and enters the tissues throughout the body, including the salivary glands and saliva.

As such, saliva is representative of the bioavailability of cortisol to target tissues throughout the body. Saliva collection at four time points throughout the day (morning, noon, evening, and night) provides a simple and convenient means for assessing not only the bioavailability of cortisol but also its circadian pattern of synthesis

 

SALIVA TESTING

Saliva testing is used for measuring hormones like cortisol, estrogen and testosterone, and its non-invasive collection asks patients to spit into a plastic tube. This sampling method allows patients to collect saliva at home at specific times, which is important for accurately measuring hormone levels.

Why do we test hormones in saliva? Steroid hormones in the bloodstream are 95-99% bound to carrier proteins, and in this form are unavailable to target tissues. Saliva testing measures the amount of hormone available to target tissues – the bioavailable amount. For this reason, saliva testing better relates to specific symptoms of excess or deficiency, and is a good option for monitoring hormone therapy.

ZRT is one of the first labs to measure hormones in saliva, and helped establish the method that made saliva hormone testing commercially viable for health care providers and patients around the globe.

This test includes:

  • C(x4)

 

These labs are for nutrition analysis only. They are not intended to diagnose, treat, cure, or prevent disease. They are not intended to replace the advice of a physician. Always consult your physician on any matters regarding your health and before nutritional changes.


ADDITIONAL FEES MAY APPLY FOR INTERNATIONAL SHIPPING. If you live outside of the United States, please contact [email protected]. The additional international shipping fee will be invoiced after the purchase of the lab. 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 57176235104

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4.2 ★★★★★
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IGs4me
Omaha, US
★★★★★ 3
Talalay pillow
Size: Queen (Mid Loft), Number of Items: 1
Much too soft. I have to purchase a second pillow in order to raise my head up sufficiently.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 23, 2025
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carol
Draper, US
★★★★★ 5
Awesome
Size: Queen (High Loft), Number of Items: 1
Great pillow
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Reviewed in the United States on April 19, 2026
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Verified Purchase
M. Hollar
Natrona Heights, US
★★★★★ 5
LOVE this pillow!!!! I have 2!!!!
Size: Queen (Mid Loft), Number of Items: 1
Well…..I have a love affair with these latex pillows. I purchased 2 of them. I have been allergic to feathers since birth and could only use latex pillows growing up. But, they became very hard to find for many years. I tried all the other kinds of pillows on the market and hated them all!!! “Won’t go flat!”….. whatever! They would go flat almost immediately. Or “Good for side sleepers!”….. NOPE!! I had a stiff neck for a week!! DONE with all of them. So,I finally got on Amazon and found this pillow. Ahhhhhh!! Loved it. Slept like a log! All night! Didn’t go flat!! No stiff neck!!! A winner!!!! Frankly,I don’t care about the cost… yeah…I know….we call have to count our change……including me. I saved to buy this pillow…..both times. AND, I would do it AGAIN!!!! And…proud to do it! So, if you have had it with all of those new prefangled so-called pillows…try this one. I would only avoid it like the plague if you are allergic to latex. Otherwise,I would definitely recommend this pillow! Wherever I go….my pillow goes. Camping, on a trip, to visit relatives…..my pillow will travel!!!!
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Reviewed in the United States on October 3, 2025
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Melissa
Omaha, US
★★★★★ 5
The Perfect Pillow
Size: Queen (Low Loft)
Finally found the right pillow for me. I have purchased quite a few latex pillows attempting to find the right one. I was apprehensive due to the support description being "extra soft". Yes, it's super soft when you pick it up and squeeze it, but it provides the perfect amount of support for side and back sleeping.
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Reviewed in the United States on May 6, 2026
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T. Simard
Massapequa, US
★★★★★ 5
These pillows are AWESOME!
Size: Standard (Mid Loft)
Absolutely awesome pillow! My sister and I used to have pillows like these as kids and always look to replace them. These are wonderful. Cool and comfortable and the perfect amount of firm and support . Spouses fight us for them!!
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Reviewed in the United States on August 10, 2025

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