Vitamin B12 Shots in Houston Energy Boost & Fatigue Relief B12 Injections Energy & Metabolism Boost Botox Oahu Honolulu B12 Deficiency, Thyroid Disease and The MTHFR Connection Dr Hagmeyer Hydroxocobalamin Injection: Vitamin B12 for Energy & Anemia 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