DOES VITAMIN B-12 INTERFERE WITH SYNTHROID MEDICINES?

DOES VITAMIN B-12 INTERFERE WITH SYNTHROID MEDICINES?

B-12

Vitamin B-12 is an essential vitamin that helps your body manufacture red blood cells. Like your thyroid, B-12 helps your body produce energy. Although the relationship between B-12 and the thyroid is not yet well understood, a study published in the May 2008 issue of "The Journal of the Pakistan Medical Association," found that B-12 deficiency is prevalent in hypothyroid patients. The study found that close to 40 percent of individuals with hypothyroidism are B-12 deficient and that B-12 replacement helps relieve hypothyroid symptoms.

Interactions

Metformin is a medication used to control blood sugar. Synthroid can decrease the effectiveness of Metformin when taken at the same time. You should take these medications at least two hours apart. L-tyrosine is a dietary supplement used to improve performance under stress. You should avoid L-tyrosine because your thyroid uses it to make hormones, so it may increase the effect of Synthroid. Synthroid may interact with cholesterol lowering drugs as well. Tell your doctor which vitamins, herbs or medications you take if he has prescribed Synthroid for you.

Read more: http://www.livestrong.com/article/547647-does-vitamin-b-12-interfere-with-synthroid-medicines/#ixzz2rSbnnRax