RE: B12 continued
Posted Saturday, September 10, 2011 at 9:22 AM
Hi all - and especially Type 2 types
Just found this information and thought I'd share (was googling "sublingual" as well as the correct dosage and came across it - bolding is mine)
Cautions and Considerations
Vitamin B12 is considered safe and is generally not toxic; however, because it can interfere with certain medications, consult with your treating physician before taking a supplement to address your nutritional concerns. Vitamin B12 shouldn't be taken without a doctor's okay if you take metformin, tetracycline, anticonsulvants, chemotherapy drugs or medications to lower cholesterol, reduce stomach acid, treat gout. Additionally, the UMMC indicates that if you take any supplement in the B vitamin family for a long duration, this can disrupt the balance of other B vitamins in your body.
Sigh. Looks like I have to see the doc before I head to the health food store...
The main thing I see here is that taking B12 alone (without other B vitamins and such - the whole "B complex" as they say) can be problematic. But then again, taking ANY nutrient alone out of proportion to everything else can be problematic.
To ponder: would anyone on metformin (or the other things mentioned) think to stop and ask their doctor if they decided to increase their red meat intake? That's a major source of B12 for most non-veg folks. So, they would, in essence, be increasing their B12 intake. I think most people would call you a bit batty if you suggested that. Why not? Probably because it also is a BALANCE of nutrients - other B vitamins, other complementary nutrients (whatever they might specifically be). Taking an individual nutrient out of context as it were opens it up to upsetting the applecart.
The only thing I consulted with my dr about was calcium - calcium supplements can interfere with my thyroid med and that is not something I want to muck with now that it's sorted to a good level. We came up with a multi pronged approach: (1) - I take a multivitamin, not a calcium supplement, that contains 50% of the RDA of calcium. That's just enough to even things out for days that I have less calcium without being too overly much on days that I get lots of calcium (2) we slightly increased the medication dose and checked on it to see how it was working (3) I take the vitamin opposite from the med - that is I take one in the a.m. and one in the p.m. so that it's not together.