Not every provider suits every patient
For extended storage, freezing the powder maintains potency for years
Proponents of vitamin B12 injections say the shots give you more energy and boost your metabolism, helping you shed unwanted pounds
Can age or health problems slow down how fast B12 works
Who May Need Extra Caution Extra caution may be needed for patients who are pregnant or trying to become pregnant, have active cancer or a cancer history requiring specialist input, have autoimmune disease, have clotting concerns, use immune-modifying medication, have uncontrolled diabetes, have significant kidney or liver disease, or are scheduled for surgery
Mild, temporary redness or itchiness can occur, especially on sensitive skin