can you take too much b12 injections How Quickly Does a Shot Work? Benefits & What to Expect Symptoms of B12 Overdose: Causes

Oral vitamins must get broken down by the GI tract (through stomach, intestines) then go through the liver for metabolizing

Dietary and Lifestyle Risk Factors Certain diets and lifestyle factors also increase the risk of B12 deficiency

Physically, you might feel weak, dizzy, or notice a strange tingling or numbness in your hands and feet

Using the same injection site twice in a row or multiple times can cause discomfort or damage to the skin

For people with healthy digestive systems, high-dose oral B12 supplements can be effective for a mild deficiency

Consult Your Healthcare Provider If you experience excessive tiredness or nerve problems, your healthcare provider can do a blood test to check vitamin B12 levels and also rule out other potential causes for your symptoms