{"product_id":"female-cortisol-awakening-response-car-test","title":"Female Cortisol Awakening Response (CAR) Test (LCMS) | Specialist Doctor Report Included","description":"\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eTest ID: S-122\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eFemale Cortisol Awakening Response (CAR) Test (LCMS)\u003c\/strong\u003e is the most detailed at-home adrenal function test available for women, measuring \u003cstrong\u003ecortisol at six precise time points throughout the day\u003c\/strong\u003e — including three readings in the critical waking window — plus \u003cstrong\u003eDHEAS\u003c\/strong\u003e. Together, these markers provide a complete picture of how your HPA axis activates in the morning, sustains energy through the day, and winds down at night.\u003c\/p\u003e\n\u003cp\u003eThe Cortisol Awakening Response is one of the most clinically informative hormonal patterns in women’s health research. It is uniquely disrupted by the hormonal changes of the menstrual cycle, perimenopause, chronic stress, and burnout — and its dysfunction is strongly linked to PMS, fatigue, mood disorders, sleep problems, and worsening menopausal symptoms. This test gives you the granular evidence to understand exactly where your cortisol rhythm is breaking down and why.\u003c\/p\u003e\n\u003cp\u003eTest from home with confidence — no clinic visit required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat Is the Cortisol Awakening Response (CAR) and Why Does It Matter for Women?\u003c\/h2\u003e\n\u003cp\u003eIn a healthy pattern, cortisol rises by approximately 50% within the first 30 minutes of waking — a surge that prepares the brain and body for the demands of the day. This is the Cortisol Awakening Response. It then continues to decline gradually until it reaches its lowest point at night, supporting melatonin production and restorative sleep.\u003c\/p\u003e\n\u003cp\u003eIn women, this rhythm is directly modulated by oestrogen and progesterone — meaning it shifts across the menstrual cycle, worsens during perimenopause, and is profoundly affected by chronic stress:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA blunted or flat CAR\u003c\/strong\u003e — the most common pattern in burnout and adrenal fatigue; associated with profound morning exhaustion, inability to get going, emotional flatness, and immune suppression in women\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn exaggerated CAR\u003c\/strong\u003e — associated with anxiety, heart palpitations on waking, high perceived stress, and premenstrual mood worsening; common in women with high-demand lifestyles or trauma history\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElevated evening or night cortisol\u003c\/strong\u003e — prevents progesterone and melatonin from rising, causing insomnia, racing thoughts, night sweats, and PMS mood symptoms in the luteal phase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow DHEAS alongside cortisol dysregulation\u003c\/strong\u003e — signals adrenal exhaustion and depleted oestrogen and testosterone precursor supply; strongly linked to worsening perimenopause symptoms, low libido, and accelerated ageing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat This Test Measures\u003c\/h2\u003e\n\u003ch3\u003eCortisol — 6 Time Points\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCortisol Upon Waking\u003c\/strong\u003e (within 5 minutes) — your baseline adrenal output on waking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCortisol +30 Minutes After Waking\u003c\/strong\u003e — the peak of the Cortisol Awakening Response; should be approximately 50% higher than the waking value in healthy adrenal function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCortisol +60 Minutes After Waking\u003c\/strong\u003e — the start of the decline; assesses how quickly the CAR resolves and adrenal regulation quality\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMidday Cortisol\u003c\/strong\u003e — assesses sustained stress response and energy maintenance; elevated midday cortisol in women is linked to blood sugar instability, anxiety, and luteal phase worsening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvening Cortisol\u003c\/strong\u003e — should be declining significantly; elevated evening cortisol in women blocks progesterone and melatonin, disrupting sleep and hormonal restoration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNight Cortisol\u003c\/strong\u003e — should be at its lowest; elevated night cortisol is a primary driver of insomnia, racing thoughts, and night sweats — particularly in perimenopause and menopause\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDHEAS (Dehydroepiandrosterone Sulfate)\u003c\/h3\u003e\n\u003cp\u003eThe adrenal precursor to oestrogen and testosterone in women. DHEAS reflects total adrenal reserve and long-term stress burden. Low DHEAS is associated with persistent fatigue, low libido, poor stress resilience, worsening perimenopause symptoms, and accelerated hormonal ageing. It declines naturally from the mid-30s but can fall much faster under chronic stress or burnout.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHow and when to collect your saliva samples: \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1885\/4859\/files\/saliva-testing-instructions.pdf?v=1648122023\" title=\"Saliva Testing Instructions\"\u003e\u003cstrong\u003e\u003cem\u003eSaliva Testing Instructions\u003c\/em\u003e\u003c\/strong\u003e\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eClick to see \u0026gt;\u0026gt; \u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1885\/4859\/files\/Saliva_Hormone_Test_Profile-III.pdf?11230793016030073961\"\u003eSample Saliva Test Result Report\u003c\/a\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWho Should Consider This Test?\u003c\/h2\u003e\n\u003cp\u003eThis test is particularly relevant for women who experience:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWaking exhausted despite adequate sleep — unable to get going in the morning\u003c\/li\u003e\n\u003cli\u003eAnxiety, heart palpitations, or a sense of dread on waking\u003c\/li\u003e\n\u003cli\u003ePersistent fatigue that does not respond to rest\u003c\/li\u003e\n\u003cli\u003eInsomnia, night waking, or racing thoughts at bedtime\u003c\/li\u003e\n\u003cli\u003ePMS that has worsened — particularly mood symptoms, anxiety, and irritability in the luteal phase\u003c\/li\u003e\n\u003cli\u003eIrregular, heavy, or missed periods\u003c\/li\u003e\n\u003cli\u003ePerimenopausal or menopausal symptoms including hot flushes, night sweats, and low mood\u003c\/li\u003e\n\u003cli\u003eChronic stress, burnout, or emotional exhaustion\u003c\/li\u003e\n\u003cli\u003eLow libido or reduced motivation\u003c\/li\u003e\n\u003cli\u003eBrain fog, poor concentration, or memory issues\u003c\/li\u003e\n\u003cli\u003eUnexplained weight gain, particularly around the abdomen\u003c\/li\u003e\n\u003cli\u003eSugar or salt cravings, especially in the afternoon\u003c\/li\u003e\n\u003cli\u003eLow blood pressure or dizziness on standing\u003c\/li\u003e\n\u003cli\u003ePCOS, thyroid conditions, or known hormonal imbalance\u003c\/li\u003e\n\u003cli\u003eFrequent illness or poor recovery\u003c\/li\u003e\n\u003cli\u003eSuspected adrenal fatigue or HPA axis dysfunction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Choose Saliva Testing for the CAR?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMeasures bioavailable (active) cortisol — the fraction actually affecting your cells\u003c\/li\u003e\n\u003cli\u003eAvoids the stress-induced cortisol spike triggered by a blood draw — which would distort the waking readings most critical to CAR assessment\u003c\/li\u003e\n\u003cli\u003eAllows precise at-home collection at the exact waking time points required\u003c\/li\u003e\n\u003cli\u003eCaptures the full morning awakening curve that clinic-based testing cannot replicate\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e6-Point Collection Protocol\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample 1:\u003c\/strong\u003e Within 5 minutes of waking — before getting out of bed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample 2:\u003c\/strong\u003e 30 minutes after waking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample 3:\u003c\/strong\u003e 60 minutes after waking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample 4:\u003c\/strong\u003e Midday\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample 5:\u003c\/strong\u003e Evening\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSample 6:\u003c\/strong\u003e Night (before sleep)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFull collection instructions and guidance on optimal cycle timing are included in the kit.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e6-point cortisol measurement plus DHEAS — the most detailed adrenal profile available at home\u003c\/li\u003e\n\u003cli\u003eAt-home saliva collection — no needles, no clinic visits\u003c\/li\u003e\n\u003cli\u003eResults within \u003cstrong\u003e3–5 working days\u003c\/strong\u003e after lab receipt\u003c\/li\u003e\n\u003cli\u003eExpert analysis by a \u003cstrong\u003eHormone Specialist PhD Doctor\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eFull diurnal cortisol curve with graphical and numerical results\u003c\/li\u003e\n\u003cli\u003eAll-inclusive price — laboratory fees included, no hidden costs\u003c\/li\u003e\n\u003cli\u003eValid for 12 months from purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat Your Report Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll six cortisol readings and DHEAS with reference ranges\u003c\/li\u003e\n\u003cli\u003eFull diurnal cortisol curve graph including the CAR window\u003c\/li\u003e\n\u003cli\u003eExplanation of your CAR pattern and what it means for your hormonal and adrenal health as a woman\u003c\/li\u003e\n\u003cli\u003eSpecialist commentary by a Hormone Specialist PhD Doctor\u003c\/li\u003e\n\u003cli\u003ePractical next-step recommendations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat hormones are included?\u003c\/h3\u003e\n\u003cp\u003eCortisol at six time points (waking, +30 min, +60 min, midday, evening, night) and DHEAS.\u003c\/p\u003e\n\u003ch3\u003eWhy is the CAR particularly important for women?\u003c\/h3\u003e\n\u003cp\u003eThe CAR is directly modulated by oestrogen and progesterone and shifts across the menstrual cycle and menopause transition. Disrupted CAR patterns in women are strongly linked to PMS, perimenopause symptoms, chronic fatigue, and mood disorders — often before any other hormonal abnormality is detectable.\u003c\/p\u003e\n\u003ch3\u003eWhen should I collect my samples during my cycle?\u003c\/h3\u003e\n\u003cp\u003eThis test can be taken at any point in your cycle. Guidance on optimal timing is included in the kit.\u003c\/p\u003e\n\u003ch3\u003eCan I use this test if I am on HRT, the contraceptive pill, or other hormonal medication?\u003c\/h3\u003e\n\u003cp\u003eYes. If you are on hormone or cortisol-related medication, it is advisable to inform your healthcare provider. Results will be interpreted in the context of your health history.\u003c\/p\u003e\n\u003ch3\u003eDo I need to fast?\u003c\/h3\u003e\n\u003cp\u003eNo fasting required. Follow the timing instructions carefully — particularly for the three morning samples, which must be collected at exact intervals after waking.\u003c\/p\u003e\n\u003ch3\u003eAre there hidden costs?\u003c\/h3\u003e\n\u003cp\u003eNo. Laboratory analysis and specialist review are fully included in the price.\u003c\/p\u003e\n\u003ch3\u003eHow long until I receive results?\u003c\/h3\u003e\n\u003cp\u003e3–5 working days after lab receipt.\u003c\/p\u003e\n\u003ch3\u003eHow long is the kit valid?\u003c\/h3\u003e\n\u003cp\u003e12 months from purchase.\u003c\/p\u003e\n\u003ch3\u003eWho pays for shipping to the lab?\u003c\/h3\u003e\n\u003cp\u003eYou are responsible for posting your samples to the laboratory. Clear instructions are included in your kit.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy We Partner with ZRT Laboratory\u003c\/h2\u003e\n\u003cp\u003eAt Hormone Lab UK, every home test kit is analysed by \u003cstrong\u003eZRT Laboratory\u003c\/strong\u003e, a globally recognised, \u003cstrong\u003eCLIA-certified\u003c\/strong\u003e diagnostic and research laboratory specialising in hormone testing, thyroid testing, fertility testing, adrenal function, neurotransmitter analysis, cardiometabolic health, heavy metals, and wellness testing. Founded in 1998 by renowned biochemist and breast cancer researcher \u003cstrong\u003eDr. David Zava, PhD\u003c\/strong\u003e, ZRT has become one of the world’s leading laboratories for advanced functional health testing.\u003c\/p\u003e\n\u003cp\u003eWith \u003cstrong\u003emore than 11 million laboratory tests\u003c\/strong\u003e performed and healthcare professionals in \u003cstrong\u003eover 96 countries\u003c\/strong\u003e relying on its expertise, ZRT is recognised for scientific excellence, analytical accuracy, and continuous innovation. The laboratory pioneered \u003cstrong\u003eat-home saliva hormone testing\u003c\/strong\u003e, introduced the \u003cstrong\u003efirst commercially available dried blood spot (DBS) hormone tests\u003c\/strong\u003e, and developed \u003cstrong\u003eDried Urine Testing (DUTS)\u003c\/strong\u003e, helping make advanced laboratory diagnostics more accessible and clinically meaningful.\u003c\/p\u003e\n\u003cp\u003eEvery sample is analysed using state-of-the-art \u003cstrong\u003eLC-MS\/MS\u003c\/strong\u003e and \u003cstrong\u003eICP-MS\u003c\/strong\u003e technology under rigorous quality control standards. ZRT collaborates with the \u003cstrong\u003eCDC\u003c\/strong\u003e, \u003cstrong\u003eNIH\u003c\/strong\u003e, and leading universities, supporting ongoing research and advances in laboratory medicine.\u003c\/p\u003e","brand":"Hormone Lab UK","offers":[{"title":"Default Title","offer_id":58617668010365,"sku":"SAL-CAR-01-F","price":159.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1885\/4859\/files\/Saliva_Hormone_Panel_Test.png?v=1785073869","url":"https:\/\/hormonelab.co.uk\/products\/female-cortisol-awakening-response-car-test","provider":"Hormone Lab UK","version":"1.0","type":"link"}