{"product_id":"thyroid-function-tsh-free-t3-and-free-t4-blood-test","title":"Thyroid Function (TSH, Free T3, and Free T4) Blood Test","description":"\u003cp\u003e\u003cstrong\u003eMeasures thyroid stimulating hormone, free T3 and free T4.\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eMeasures\u003c\/h3\u003e\u003cp\u003eThyroid stimulating hormone, free T3 and free T4.\u003c\/p\u003e\u003ch3\u003eWhy it matters\u003c\/h3\u003e\u003cp\u003eTSH is the pituitary's signal to the thyroid; free T4 is the main hormone the thyroid releases; free T3 is the more active form that T4 converts into.\u003c\/p\u003e\u003cp\u003eReading the three together is what makes thyroid assessment work — TSH alone describes the signal without the response, and the relationship between signal and hormones is the informative part.\u003c\/p\u003e\u003ch3\u003eBefore you collect\u003c\/h3\u003e\u003cp\u003eTSH varies across the day and is typically highest in the early morning. Morning collection, consistently, if you're comparing over time. If you take thyroid medication, discuss collection timing relative to your dose with your practitioner. Biotin supplements can interfere with thyroid assays — stop for 48 hours beforehand unless advised otherwise.\u003c\/p\u003e\u003ch3\u003eSuits\u003c\/h3\u003e\u003cp\u003ePeople assessing thyroid function with a practitioner.\u003c\/p\u003e\u003ch3\u003eYour next step\u003c\/h3\u003e\u003cp\u003eOnce you have your results, book with a Canwell naturopath, nutritionist or practitioner to talk them through and build a wellness plan that suits you. \u003ca href=\"https:\/\/canwell.com.au\"\u003eBook with Canwell\u003c\/a\u003e\u003c\/p\u003e","brand":"Canwell Bloods","offers":[{"title":"Default Title","offer_id":48892355903733,"sku":"CW-THYROID-FUNCTION-TSH-FREE-T3-AND-FREE-T4-BLOOD-TEST","price":71.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0728\/8265\/1381\/files\/canwell-blood.jpg?v=1789967203","url":"https:\/\/bloods.canwell.com.au\/products\/thyroid-function-tsh-free-t3-and-free-t4-blood-test","provider":"Canwell Blood Analytics","version":"1.0","type":"link"}