A couple of questions

What are the worst symptoms of B12 deficiency?

What is considered severe B12 deficiency?

A serum B12 above 300 pg/mL is interpreted as normal. Patients with B12 levels between 200 and 300 pg/mL are considered borderline, and further enzymatic testing may be helpful in diagnosis. Patients with B12 levels below 200 pg/mL are considered deficient.

Can B12 deficiency cause serious problems?

A lack of vitamin B12 can cause neurological problems, which affect your nervous system, such as: vision problems. memory loss. pins and needles (paraesthesia)

Can low B12 make you feel like you’re dying?

Vitamin B12 deficiency is common, but extremely low levels can be dangerous and cause symptoms that interfere with your life. When untreated over time, the physical and psychological symptoms of this deficiency may be debilitating and make you feel like you're dying.

How long does it take to correct a B12 deficiency?

Once you begin treating your vitamin B12 deficiency, it can take up to six to 12 months to fully recover. It is also common to not experience any improvement during the first few months of treatment. If you can, it's a good idea to address what's causing the deficiency.

How do you know if your B12 is low in a blood test?

Doctors diagnose vitamin deficiency anemias through blood tests that check: The number and appearance of red blood cells. People with anemia have fewer red blood cells than normal. In vitamin deficiency anemias related to a lack of vitamin B-12 and folate, the red blood cells appear large and underdeveloped.

Can you feel worse after B12 injection?

Pain/redness at the injection site, mild diarrhea, itching, or a feeling of swelling all over the body may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

How long does it take to recover from a severe B12 deficiency?

How Long Does It Take to Recover from B12 Deficiency? Once you begin treating your vitamin B12 deficiency, it can take up to six to 12 months to fully recover. It is also common to not experience any improvement during the first few months of treatment.