3 The UK National Institute for Health and Care Excellence (NICE) states that a cut-off of 200 ng/l identifies 97% of people with B12 deficiency, and a level below 100 ng/l is usually accompanied by metabolic or clinical evidence of B12 deficiency
These may include bruising, bleeding, or swelling at the place of injection, as well as mild burning along the penis
However, the recommended dosage for treating deficiency may vary depending on the severity of the deficiency and your overall health
For some people these changes are among the first noticeable signs, though mood symptoms can have many causes and should be evaluated by a professional
The right answer depends on what stalled and what your bloodwork shows
Not a medicine, supplement, or food