HASHIMOTO'S THYROIDITIS What is Hashimoto's thyroiditis? Hashimoto's thyroiditis is an autoimmune condition in which the immune system attacks the thyroid gland. Over time, this can damage the thyroid and On The Go B12 Injection at enTrust Urgent Care Center Clinic B12 Injections Naturopath Ottawa Dr. Noah Litvak Enhance Your Wellness Today Dr. Noah Litvak, ND How Much Vitamin B12 Should you Take for Your Thyroid? Symptoms of vitamin b12 deficiency. Studies show that low levels of vitamin b12 may be more common in people with hypothyroidism. Vitamin b12 is also involved in making and metabolizing thyroid