I just started Levothyroxine a few days ago at 50mcg with my last TSH 6.36 and I just wanted to know if I need to supplement. My B12 is 471 pg/mL with the reference range of 211-946, and Folate is 11ng/mL with reference range greater than >3.0. My Vit D is low at 27.3 ng/mL R.R. 30-100, so I know that needs to be higher. Also, I've read that Methylcobalamin if I spelled that right is the way to go for B12, but what is a safe supplier that doesnt contain heavy metal contamination and actually contains what it's supposed to.