The fine gauge minimizes the puncture hole in the rubber stopper (extending the useful life of the vial) and creates less tissue trauma during subcutaneous administration
That includes smoking, drinking alcohol, exposure to toxic substances in the environment, and having excess body fat
But if left untreated, B12 deficiency can lead to problems with your brain, nerves or heart like: Fatigue Weakness Lightheadedness Headaches GI symptoms like nausea, gas, or diarrhea Memory loss, depression, or other mental issues Decreased smell and taste Vision changes Glossitis (painful, red, smooth tongue) Numbness, tingling, or muscle weakness Shortness of breath Heart palpitations One specific autoimmune disease that causes B12 deficiency is pernicious anemia
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