{"product_id":"total-b12","title":"Total Vitamin B12","description":"\u003cp\u003eThe standard first-line B12 test. It includes the large fraction bound to a carrier that does not deliver B12 to cells, which is its main weakness.\u003c\/p\u003e\u003cp\u003e\u003ca href=\"\/pages\/biomarker-guide-vitamins-and-minerals#m-total-vitamin-b12\"\u003eTotal Vitamin B12 in the Biomarker Guide\u003c\/a\u003e — what it is, why it is tested, and what moves the number.\u003c\/p\u003e\u003cp\u003eAdd-on markers can only be added to venous samples.\u003c\/p\u003e\u003ch3\u003eTiming\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNo fasting needed and no particular time of day.\u003c\/strong\u003e If you take a B12 supplement or have had a B12 injection, the result reflects that rather than your own stores.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTurnaround:\u003c\/strong\u003e the lab reports this test within 24 hours of receiving your sample, counted in working days. Most samples reach them within about 3 days of posting. Full detail on our \u003ca href=\"\/pages\/turnaround-times\"\u003eTurnaround Times\u003c\/a\u003e page.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eWe do not interpret results. Not medical advice or a diagnosis.\u003c\/em\u003e\u003c\/p\u003e","brand":"N1 Health","offers":[{"title":"Default Title","offer_id":58266851443032,"sku":"N1-A-TOTAL-VITAMIN-B12","price":12.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1533\/1928\/files\/total-b12-v5.png?v=1787608803","url":"https:\/\/n1health.co.uk\/products\/total-b12","provider":"N1 Health","version":"1.0","type":"link"}