{"product_id":"female-thyroid-cortisol-test-kit","title":"Female Thyroid \u0026 Cortisol Test Kit | Specialist Doctor Report Included","description":"\u003cp\u003e\u003cstrong\u003eTest ID: SB-640 | Saliva 4-Point Cortisol + Blood Spot Thyroid Panel\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eFemale Thyroid \u0026amp; Cortisol Test Kit\u003c\/strong\u003e is a comprehensive at-home hormone test designed specifically for women, measuring \u003cstrong\u003e10 key markers\u003c\/strong\u003e across thyroid function and the full daily cortisol rhythm. It combines a \u003cstrong\u003e4-point saliva cortisol profile\u003c\/strong\u003e with a \u003cstrong\u003efull blood spot thyroid panel\u003c\/strong\u003e — providing a clinically meaningful picture of two of the most interconnected hormone systems in women’s health.\u003c\/p\u003e\n\u003cp\u003eThyroid dysfunction and cortisol dysregulation are among the most common and most frequently missed causes of persistent symptoms in women. They are also deeply interdependent: chronic cortisol elevation suppresses T3 conversion, mimicking hypothyroidism even when the thyroid gland itself is healthy. Conversely, thyroid insufficiency impairs the body’s stress resilience and disrupts the cortisol rhythm. Testing both together — as this kit does — is the most clinically complete approach available outside a hospital setting.\u003c\/p\u003e\n\u003cp\u003eTest from home with confidence — no clinic visit required. Results within \u003cstrong\u003e3–5 working days\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy This Test Is Particularly Important for Women\u003c\/h2\u003e\n\u003cp\u003eWomen are 5–10 times more likely than men to develop thyroid disorders — and thyroid disease in women is frequently underdiagnosed or misattributed to stress, depression, or perimenopause. The relationship between thyroid hormones and the female hormonal system is direct and significant:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOestrogen and thyroid hormones are closely linked\u003c\/strong\u003e — rising oestrogen (during the cycle, pregnancy, or HRT) increases thyroid-binding globulin, reducing available free T3 and T4 and potentially triggering or worsening hypothyroid symptoms even when TSH appears normal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThyroid dysfunction disrupts the menstrual cycle\u003c\/strong\u003e — both hypothyroidism and hyperthyroidism can cause irregular, heavy, or absent periods; low thyroid function is a significant and overlooked cause of fertility problems in women\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCortisol suppresses T3 conversion\u003c\/strong\u003e — under chronic stress, the body converts T4 to reverse T3 (rT3) rather than active T3; this produces hypothyroid-like symptoms (fatigue, weight gain, brain fog, low mood) with a normal TSH — detectable only when FT3 is measured alongside TSH and FT4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThyroid autoimmunity peaks in women\u003c\/strong\u003e — Hashimoto’s thyroiditis is the most common cause of hypothyroidism in women; TPO and Tg antibodies are the diagnostic markers, and many women carry elevated antibodies for years before TSH becomes abnormal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerimenopause and thyroid symptoms overlap significantly\u003c\/strong\u003e — fatigue, weight gain, brain fog, mood changes, and disrupted sleep are shared by both conditions; testing both thyroid and cortisol allows accurate differentiation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat This Test Measures\u003c\/h2\u003e\n\u003ch3\u003eBlood Spot — Full Thyroid Panel\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTSH (Thyroid Stimulating Hormone):\u003c\/strong\u003e The pituitary signal to the thyroid. The standard first-line thyroid screen — but in women, TSH alone misses early thyroid dysfunction, antibody-positive Hashimoto’s, and cortisol-driven T3 suppression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree T3 (FT3):\u003c\/strong\u003e The active thyroid hormone — the form that actually enters cells and drives metabolism, energy, mood, and temperature regulation. Low FT3 with normal TSH is one of the most common patterns in chronically stressed women and is the direct cause of hypothyroid symptoms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree T4 (FT4):\u003c\/strong\u003e The thyroid’s main output hormone, converted to T3 in peripheral tissues. Low FT4 alongside normal TSH suggests early thyroid insufficiency or impaired conversion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal T4 (TT4):\u003c\/strong\u003e Measures total circulating T4, including bound fraction. Useful for assessing the impact of oestrogen on thyroid hormone binding — particularly relevant for women on HRT or the contraceptive pill.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTPO Antibodies (Anti-TPO):\u003c\/strong\u003e The primary marker of Hashimoto’s thyroiditis — the autoimmune condition responsible for the majority of hypothyroidism in women. Elevated TPO antibodies can be present for years before TSH becomes abnormal, making early detection clinically important.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThyroglobulin Antibodies (Anti-Tg):\u003c\/strong\u003e A second autoimmune marker that, when elevated alongside or independently of TPO antibodies, confirms autoimmune thyroid disease. Some women with Hashimoto’s have elevated Tg antibodies but normal TPO.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSaliva — 4-Point Cortisol Profile\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMorning Cortisol:\u003c\/strong\u003e Evaluates the Cortisol Awakening Response — the critical morning surge that sets energy, mood, and thyroid hormone activity for the day. In women, morning cortisol directly influences progesterone balance and cycle regularity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoon Cortisol:\u003c\/strong\u003e Assesses mid-day stress load. Elevated noon cortisol in women impairs T4-to-T3 conversion and promotes blood sugar instability and anxiety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvening Cortisol:\u003c\/strong\u003e Should be declining by early evening to allow thyroid hormone activity, melatonin production, and hormonal restoration to proceed during sleep.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNight Cortisol:\u003c\/strong\u003e Elevated night cortisol is a primary driver of insomnia and disrupted sleep in women — and suppresses the overnight cellular thyroid hormone uptake essential for morning energy and metabolic function.\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\u003ePersistent fatigue or exhaustion that does not improve with sleep or rest\u003c\/li\u003e\n\u003cli\u003eUnexplained weight gain or difficulty losing weight despite diet and exercise\u003c\/li\u003e\n\u003cli\u003eBrain fog, poor memory, or difficulty concentrating\u003c\/li\u003e\n\u003cli\u003eLow mood, anxiety, or depression\u003c\/li\u003e\n\u003cli\u003eFeeling cold all the time, or temperature sensitivity\u003c\/li\u003e\n\u003cli\u003eDry skin, hair thinning or loss, or brittle nails\u003c\/li\u003e\n\u003cli\u003eIrregular, heavy, or absent periods\u003c\/li\u003e\n\u003cli\u003eFertility difficulties or recurrent miscarriage\u003c\/li\u003e\n\u003cli\u003ePerimenopausal or menopausal symptoms that are difficult to manage\u003c\/li\u003e\n\u003cli\u003eInsomnia, night waking, or unrefreshing sleep\u003c\/li\u003e\n\u003cli\u003eChronic stress, burnout, or adrenal fatigue\u003c\/li\u003e\n\u003cli\u003ePalpitations, anxiety, or feeling wired but tired\u003c\/li\u003e\n\u003cli\u003ePreviously diagnosed thyroid condition being monitored\u003c\/li\u003e\n\u003cli\u003eFamily history of thyroid disease or autoimmune conditions\u003c\/li\u003e\n\u003cli\u003eCurrently on HRT or the contraceptive pill (which can affect thyroid binding)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e10-marker thyroid and cortisol panel in a single at-home kit\u003c\/li\u003e\n\u003cli\u003eBlood spot collection for thyroid markers — finger-prick, no venepuncture\u003c\/li\u003e\n\u003cli\u003eSaliva collection for cortisol — non-invasive, captures bioavailable (active) cortisol at four time points\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\u003eClear graphical and numerical results with personalised commentary\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\u003eHow It Works\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder the kit online\u003c\/strong\u003e — delivered directly to your door.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollect your blood spot sample\u003c\/strong\u003e via a simple finger-prick onto the collection card, and your \u003cstrong\u003esaliva samples\u003c\/strong\u003e at four time points across the day, following the detailed instructions provided.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePost your samples to the lab\u003c\/strong\u003e using the pre-addressed return instructions included in your kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReceive your results within 3–5 working days\u003c\/strong\u003e, with specialist commentary and clear next-step guidance.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat Your Report Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAll 10 marker results with sex- and age-appropriate reference ranges\u003c\/li\u003e\n\u003cli\u003eVisual charts for your cortisol daily curve and thyroid panel values\u003c\/li\u003e\n\u003cli\u003eClinical interpretation of the relationship between your thyroid and cortisol results\u003c\/li\u003e\n\u003cli\u003eSpecialist commentary by a Hormone Specialist PhD Doctor\u003c\/li\u003e\n\u003cli\u003ePersonalised next-step recommendations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat does this test measure?\u003c\/h3\u003e\n\u003cp\u003eTSH, Free T3, Free T4, Total T4, TPO Antibodies, Thyroglobulin Antibodies (blood spot) plus Morning, Noon, Evening, and Night Cortisol (saliva) — 10 markers in total.\u003c\/p\u003e\n\u003ch3\u003eWhy test thyroid and cortisol together?\u003c\/h3\u003e\n\u003cp\u003eChronic cortisol elevation directly suppresses T4-to-T3 conversion, producing hypothyroid symptoms with a normal TSH. Testing both together allows accurate differentiation between true thyroid disease, cortisol-driven thyroid suppression, and autoimmune thyroid conditions — which require different approaches to management.\u003c\/p\u003e\n\u003ch3\u003eCan I use this test if I am on levothyroxine, HRT, or the contraceptive pill?\u003c\/h3\u003e\n\u003cp\u003eYes. These medications can affect thyroid hormone binding and metabolism, which is precisely why testing FT3, FT4, and antibodies alongside TSH provides a more complete picture. Follow the timing guidance in your kit.\u003c\/p\u003e\n\u003ch3\u003eHow accurate is the test?\u003c\/h3\u003e\n\u003cp\u003eBlood spot samples are analysed using advanced immunoassay technology; saliva cortisol is measured using \u003cstrong\u003eLC-MS\/MS\u003c\/strong\u003e — the gold standard for bioavailable hormone measurement.\u003c\/p\u003e\n\u003ch3\u003eWhen will I get my results?\u003c\/h3\u003e\n\u003cp\u003eWithin \u003cstrong\u003e3–5 working days\u003c\/strong\u003e after your samples reach the laboratory.\u003c\/p\u003e\n\u003ch3\u003eAre there hidden costs?\u003c\/h3\u003e\n\u003cp\u003eNo. Laboratory analysis and specialist review are fully included. You are responsible for postage to the lab.\u003c\/p\u003e\n\u003ch3\u003eHow long is the kit valid?\u003c\/h3\u003e\n\u003cp\u003e12 months from purchase.\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":58618150846845,"sku":"2024-F","price":229.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1885\/4859\/files\/SalivaandBloodSpotHormoneTestKit.webp?v=1785073903","url":"https:\/\/hormonelab.co.uk\/ar\/products\/female-thyroid-cortisol-test-kit","provider":"Hormone Lab UK","version":"1.0","type":"link"}