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Does vitamin b 12 interfere with synthroid medicines

A 48-year-old male asked:
Dr. Charles Saha
Gastroenterology 28 years experience
Dosage is too high: should only take up to 1000mcg daily
Dr. John Chiu
Allergy and Immunology 57 years experience
Safe but: may not do much good if you have no problem absorbing vitamin B12 . If you are a vegan, then this is a good idea since you would otherwise have no sou... Read More

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A 45-year-old member asked:
Dr. Pamela Pappas
Psychiatry 42 years experience
Vitamin B12: In B12 deficiency, doses of 300-10, 000 mcg (microgram) by mouth daily have been used. 2500 mcg per day is not too much.
A 42-year-old member asked:
Dr. Eric Weisman
Neurology 36 years experience
Sub lingual?: A year supply of B12 liquid (remember to hold it under the tongue for 30 seconds) costs about 8-12 dollars. Usually an eye dropper full is taken twice... Read More
A 25-year-old female asked:
Dr. Susan Rhoads
Family Medicine 38 years experience
No.: Breast only grow if you gain weight and add fat. Your behind can be toned and look larger with exercise. Gaining weight makes that bigger too. But we... Read More
A 38-year-old member asked:
Dr. Eric Weisman
Neurology 36 years experience
Yes: It can land you in the nursing home with subcortical dementia if untreated. You'ld have to be wheeled in as its likely that your balance would be real... Read More
A 41-year-old male asked:
Dr. Ed Friedlander
Pathology 44 years experience
Get plenty of it: If you have become a vegan out of concern for factory-farmed animals, you have my admiration and congratulations. You also need to know that the healt... Read More
A 23-year-old female asked:
Dr. Paul Kaplowitz
Pediatric Endocrinology 45 years experience
Not a problem: It is very unlikely that taking B-12 and levothyroxine together is making it difficult for your body to absorb either one so I see no reason you canno... Read More
A 63-year-old male asked:
Dr. Klaus d Lessnau
Pulmonary Critical Care 36 years experience
You may not need any: You want to have a blood level for vitamin b 12. It will probably be normal, as long as you eat healthy food or take one mvi (multivitamin). Dis... Read More
A 48-year-old member asked:
Dr. Randy Baker
Holistic Medicine 40 years experience
It depends...: Work for what? If someone has B12 deficiency then B12 shots definitely "work" to treat the deficiency and resultant anemia/neurological symptoms. Howe... Read More
A 40-year-old member asked:
Dr. Marcel Hungs
Neurology 26 years experience
No: B12 is usually safe. You can follow with a B12 level and adjust the supplement.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

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