I am getting ready to have the Thyroid Blood Test 10 done by BH but doing a bit of homework first. I have been supplementing with Vit B12 1000 subliminal and also a smallish amount in the B Complex I have been taking. Could you please tell me how long I need to stop supplementing before having the B12 test? I have not taken any for a couple of days and hope to get test done in January. Also is the B12 test included in the thyroid 10 test the Active one that I have read is the best one to have?