{"product_id":"nutripath-vitamin-d-blood-test","title":"Vitamin D blood test","description":"\u003ch2 class=\"product-marketing-headline\"\u003eKnow exactly where your vitamin D levels sit\u003c\/h2\u003e\u003cp class=\"product-tagline\"\u003e\u003cem\u003eThe single most important vitamin D marker. 25-hydroxyvitamin D reflects your true status across the last 2 to 3 months.\u003c\/em\u003e\u003c\/p\u003e\u003cp class=\"product-brand-attribution\"\u003eTest processed by \u003cstrong\u003eNutriPath\u003c\/strong\u003e\u003c\/p\u003e\u003cdiv class=\"product-short-description\"\u003e\u003cp\u003eA simple blood test measuring 25-hydroxyvitamin D, the circulating form of vitamin D that reflects your vitamin D status over the preceding 2 to 3 months. The foundational micronutrient test recommended for anyone with fatigue, frequent infections, bone or muscle pain, low mood, or a thyroid or autoimmune condition.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv class=\"product-long-description\"\u003e\u003cp\u003eVitamin D is not really a vitamin. It is a steroid hormone that regulates over 200 genes, with receptors in almost every tissue in the body. Low vitamin D is associated with fatigue, frequent respiratory infections, low mood, bone and muscle pain, autoimmune thyroid activity, cardiovascular risk and impaired immune function. Despite Australia's sunny climate, Australian vitamin D deficiency rates sit around 23 percent in summer and 58 percent in winter in the higher latitude states. Sunscreen use, indoor work, dark skin, covering clothing, and living south of Brisbane all increase the likelihood of inadequate status. The 25-hydroxyvitamin D test is the correct marker (not 1,25-dihydroxy, which is a hormone measurement used in specific renal contexts). Ideal range sits between 100 and 150 nmol\/L for most functional practitioners, with levels under 75 worth addressing and under 50 considered deficient.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv class=\"product-ingredients\"\u003e\n\u003ch3\u003eWhat it measures\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBiomarker\u003c\/th\u003e\n\u003cth\u003eSample\u003c\/th\u003e\n\u003cth\u003eReference Range\u003c\/th\u003e\n\u003cth\u003eWhat it tells you\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e25-Hydroxyvitamin D (25-OHD)\u003c\/td\u003e\n\u003ctd\u003eBlood (SST)\u003c\/td\u003e\n\u003ctd\u003e100 to 150 nmol\/L optimal, 75 to 100 adequate, under 50 deficient\u003c\/td\u003e\n\u003ctd\u003eThe circulating storage form of vitamin D. Reflects status over the preceding 2 to 3 months. The standard marker for vitamin D assessment.\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-how-to-take\"\u003e\n\u003ch3\u003eHow to collect and what to expect\u003c\/h3\u003e\n\u003cp\u003eNo fasting required. Book at any NutriPath referral centre. Results in 2 to 4 business days.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-warnings\"\u003e\n\u003ch3\u003eWarnings and cautions\u003c\/h3\u003e\n\u003cp\u003eThis is a health information test. Do not start high dose vitamin D supplementation (above 4000 IU daily) without practitioner guidance, particularly if you have sarcoidosis, primary hyperparathyroidism, or take calcium supplements. Vitamin D toxicity is rare but possible with chronic high dose supplementation without monitoring.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-faqs\"\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eI take a vitamin D supplement. Should I still test?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eYes, particularly if you are taking anything above 1000 IU daily. Response to supplementation varies substantially between individuals based on body weight, fat mass, genetic variants and baseline status. Testing confirms whether your dose is actually reaching the target range.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhat is the ideal vitamin D level?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eMainstream medicine considers levels above 50 nmol\/L adequate. Functional medicine typically targets 100 to 150 nmol\/L for optimal immune, thyroid and mood outcomes. The evidence base for levels above 150 is weaker, and levels above 250 raise toxicity concerns. Targeting 120 nmol\/L is a reasonable functional goal.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eHow much vitamin D should I take to correct deficiency?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eDepends on starting level, body weight and co factors. Typical repletion protocols range from 2000 IU daily for mild deficiency to 5000 to 10000 IU daily under practitioner supervision for severe deficiency. Retesting after 8 to 12 weeks confirms response.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003e\u003cstrong\u003eWhy is vitamin D so often associated with thyroid and autoimmune disease?\u003c\/strong\u003e\u003c\/summary\u003e\u003cp\u003eVitamin D has immunomodulatory effects, and low vitamin D is consistently observed in autoimmune conditions including Hashimoto's, Graves' and multiple sclerosis. Optimising vitamin D is one of the evidence supported interventions for slowing autoimmune thyroid antibody progression.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-clinical-evidence\"\u003e\n\u003ch3\u003eClinical evidence\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/24922004\/\" target=\"_blank\" rel=\"noopener\"\u003eVitamin D status and all cause mortality\u003c\/a\u003e: Meta analysis linking 25-OHD status to mortality outcomes.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/23978268\/\" target=\"_blank\" rel=\"noopener\"\u003eVitamin D and autoimmune thyroid disease\u003c\/a\u003e: Evidence on vitamin D status in Hashimoto's and Graves'.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/22229468\/\" target=\"_blank\" rel=\"noopener\"\u003eAustralian vitamin D deficiency prevalence\u003c\/a\u003e: Australian data on vitamin D deficiency rates.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"NutriPath","offers":[{"title":"Default Title","offer_id":52591876112658,"sku":"OPTI-NUTRIPATH-VITAMIN-D-BLOOD-TEST","price":119.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0557\/2087\/0083\/files\/nutripath-vitamin-d-blood-test.jpg?v=1786431154","url":"https:\/\/optilabs.com.au\/products\/nutripath-vitamin-d-blood-test","provider":"OptiLabs by Evergreen Doctors","version":"1.0","type":"link"}