What happens if you have low B12 for a long time?

A prolonged vitamin B12 deficiency can cause severe health issues, primarily affecting the nervous system and blood, leading to anemia, fatigue, cognitive decline (memory loss, confusion, dementia), neurological damage (pins and needles, balance problems, paralysis), mood changes (depression, paranoia), and potentially irreversible nerve damage, heart problems, infertility, and developmental issues in infants.

Can low B12 cause permanent damage?

Long-term vitamin B12 deficiency can cause nerve damage. This may be permanent if you do not start treatment promptly after your symptoms begin. If nerve damage is severe or long-lasting, some damage may be permanent. Vitamin B12 deficiency anemia most often responds well to treatment.

Can B12 cause nausea?

Taking doses of vitamin B-12 might cause: Headache. Nausea. Diarrhea.

What are the worst symptoms of B12 deficiency?

The worst B12 deficiency symptoms involve severe nerve damage and mental changes, including persistent numbness/tingling, balance/walking difficulties (ataxia), confusion, memory loss, vision problems, psychosis, and hallucinations, which can become permanent if untreated; also severe fatigue, shortness of breath, and heart palpitations signify serious anemia.
 

Why am I constantly B12 deficient?

Your B12 is always low because of poor absorption (stomach issues, autoimmune disease, surgery) or insufficient dietary intake (especially if vegan/vegetarian), often involving problems with stomach acid, intrinsic factor, or intestinal diseases like Crohn's or celiac, leading to persistent deficiency requiring supplements or injections. 

B12 Deficiency (7 Signs Doctors Miss) 2024

Which organ is responsible for B12 deficiency?

Conditions affecting the stomach

Some stomach conditions or stomach operations can prevent the absorption of enough vitamin B12. For example, a gastrectomy, a surgical procedure where part of your stomach is removed, increases your risk of developing a vitamin B12 deficiency.

What cancers cause B12 deficiency?

Cancers affecting the gastrointestinal tract (stomach, colon, pancreas, esophagus) and blood cancers (leukemia, lymphoma) are commonly linked to B12 deficiency, primarily by disrupting absorption or production; tumors can block nutrient uptake, damage stomach lining (reducing intrinsic factor), or impair bone marrow function, making B12 deficiency a potential sign of underlying malignancy, though it has other causes too.
 

What do you crave when your B12 is low?

B12 deficiency can cause specific food cravings, particularly for meat, fish, or eggs, as your body seeks sources of the vitamin, and may also lead to sugar cravings due to its role in serotonin and energy regulation, but it can also manifest as pica (craving non-food items like ice or even bleach in severe cases). These cravings signal your body trying to correct a nutrient imbalance, but clinical testing is needed for a proper diagnosis, as emotional factors also drive cravings. 

What are the facial signs of B12 deficiency?

Cutaneous manifestations associated with vitamin B12 deficiency are skin hyperpigmentation, vitiligo, angular stomatitis, and hair changes. A diagnosis of vitamin B12 deficiency is often overlooked in its early stages because these signs are not specific to vitamin B12 deficiency alone.

What is a Stage 4 B12 deficiency?

Stage 4 B12 deficiency is the severe, clinical stage, marked by significant neurological issues like nerve damage (spinal cord degeneration, numbness, paralysis risk), cognitive decline (memory loss, confusion), and severe anemia (megaloblastic anaemia), leading to fatigue, depression, and balance problems, requiring urgent treatment with B12 injections to prevent permanent damage, as symptoms overlap with other neurological conditions.
 

What not to do after a B12 injection?

After a B12 injection, you should avoid rubbing the site, taking hot baths/saunas, and heavy exercise for 24-48 hours to prevent irritation and infection; also, limit alcohol as it hinders absorption, and drink plenty of water to help your body use the vitamin. For best results, stay hydrated, rest, and contact your provider if you have severe reactions like rash or difficulty breathing, which could signal an allergic reaction.
 

What food is highest in B12?

The foods highest in Vitamin B12 are organ meats (like liver and kidney) and shellfish (especially clams), offering thousands of percent of the daily value in small servings, with fortified cereals, dairy, fish (salmon, tuna, sardines), and eggs also being excellent sources. For vegans, fortified foods like nutritional yeast and plant milks are key, as B12 is naturally found in animal products.
 

What deficiency causes you to feel off balance?

Feeling off-balance, dizzy, or unsteady (ataxia) can be caused by deficiencies in Vitamin B12, crucial for nerve function, and Vitamin D, important for nerve signals and muscle tone, with Iron deficiency (anemia) also a common culprit due to poor oxygen supply to the brain, alongside potential roles for magnesium. These deficiencies affect your nervous system, proprioception (body awareness), and circulation, leading to balance issues, numbness, fatigue, and cognitive problems. 

What level of B12 requires injections?

Low B12 level (<150 pg/ml)

- If positive, i.e. diagnostic of PA, offer long-term IM Vitamin B12 injection 1mg every 3 months.

What organ can incur lasting damage from B12 deficiency?

Younger adults who have pernicious anemia (due to lack of intrinsic factor) are more likely to develop stomach and other gastrointestinal cancers. In people with nerve damage, the legs (particularly the feet) are affected earlier and more often than the arms.

When to worry about B12 deficiency?

Vitamin B12 deficiency can also cause symptoms that affect your brain and nervous system (neurological symptoms), including: numbness. muscle weakness. psychological problems, which can range from mild depression or anxiety, to confusion and dementia.

What are the symptoms of B12 deficiency in legs?

Symptoms may include:

• Weak muscles.
• Numb or tingling feeling in hands and feet.
• Trouble walking.
• Nausea.
• Decreased appetite.
• Weight loss.
• Irritability.
• Lack of energy or tiring easily (fatigue)

What does B12 deficiency do to nails?

A vitamin B12 deficiency can show up in your nails as darker pigmentation (brown/blue-black streaks or patches, melanonychia), brittleness, vertical ridges, or even paleness due to anemia, as B12 affects red blood cells and oxygen delivery, leading to discoloration and weakness, with changes often appearing slowly.
 

Can low B12 cause panic attacks?

Cardiovascular quirks – Heart murmurs, erratic blood pressure. Severe Anxiety/Panic Attacks – Overwhelming feelings of dread, often without warning. “The Sighs” – B12 deficiency patients sometimes report having to take a deep intake of breath periodically, often unaware they are doing it.

Which fruit is B12 rich?

Apples and bananas help improve gut health, supporting better B12 absorption. Some fortified fruit juices (like orange juice) may include added B12.

What illnesses cause low B12?

Diseases causing B12 deficiency primarily affect stomach/intestinal absorption, like Pernicious Anemia (autoimmune attack on intrinsic factor), Crohn's, Celiac, H. pylori, or pancreatic issues, plus surgeries (gastric bypass) or genetic disorders, leading to inability to absorb dietary B12 from foods like meat, dairy, eggs. 

Who suffers most from B12 deficiency?

The groups most prone to vitamin B12 deficiency are older adults, individuals with gastrointestinal issues (like Crohn's, celiac, or stomach surgery), those on strict vegan/vegetarian diets, and people taking certain medications (like metformin, PPIs). Deficiency often stems from poor absorption due to age-related stomach changes or autoimmune conditions like pernicious anemia, or insufficient intake from a lack of animal products. 

Can lack of B12 affect your eyes?

Vitamin B12 deficiency can significantly impact the eyes, primarily causing optic neuropathy, which damages the optic nerve, leading to gradual or sudden vision loss, blurred vision, washed-out colors, and visual field defects. It can also manifest as severe dry eyes, ocular pain, swollen optic discs, double vision (diplopia), and sometimes even pupil abnormalities, with many of these effects improving or resolving with timely B12 treatment.