Can you take too much B12?

Since B12 is a water-soluble vitamin, it's generally considered safe, even at high doses. No Tolerable Upper Intake Level (UL) has been established for B12, due to its low level of toxicity. UL refers to the maximum daily dose of a vitamin unlikely to cause adverse side effects in the general population.

How much B12 can you safely take a day?

The recommended daily intake (RDI) for vitamin B12 for people over 14 is 2.4 mcg ( 1 ). However, you may want to take more or less, depending on your age, lifestyle, and specific situation.

Is it OK to take 1000 mcg B12 daily?

What is the dosage for cyanocobalamin tablets? The recommended dose for treating vitamin B12 deficiency is 1000 mcg daily. The recommended dose for preventing vitamin B12 deficiency is 1500 mg or 2500 mcg (sublingual tablets) daily.

What is a dangerously high B12 level?

An abnormally high vitamin B-12 status is anything over 900 pg/mL. This result may suggest liver or kidney problems, diabetes, or certain forms of leukemia.

Is 5000 mcg of B12 too much?

Since B12 is a water-soluble vitamin, it's generally considered safe, even at high doses. No Tolerable Upper Intake Level (UL) has been established for B12, due to its low level of toxicity. UL refers to the maximum daily dose of a vitamin unlikely to cause adverse side effects in the general population.

What medications should not be taken with B12?

Certain medications can decrease the absorption of vitamin B12, including: colchicine, metformin, extended-release potassium products, antibiotics (such as gentamicin, neomycin, tobramycin), anti-seizure medications (such as phenobarbital, phenytoin, primidone), medications to treat heartburn (such as H2 blockers ...

What are the side effects of B12 1000 mcg?

What are the side effects of vitamin B-12?

• mild diarrhea.
• itching.
• skin rash.
• headache.
• dizziness.
• nausea.
• vomiting.
• pulmonary edema and congestive heart failure early in treatment.

What happens if you take too much vitamin B?

When a higher dose of vitamin B is taken, people may suffer from indigestion, nausea or mild diarrhea. People with a prior history of gastrointestinal problems and aged individuals are more likely to suffer from intense stomach cramps and severe diarrhea after taking high doses of vitamin B.

How often should I take B12 1000 mcg?

The exact dosage is determined by your doctor depending on your medical condition. Generally, a daily dosage of 1000 micrograms is used to treat a deficiency without any side effects.

When should I take B12 morning or night?

As a general rule of thumb, take your B vitamins in the morning or with a meal. Vitamin B12, for example, should definitely be taken in the morning. This is because it is important for energy metabolism, which may interrupt your sleep if taken at night.

Is B12 level of 1500 too high?

There is no consensus on the definition of high or elevated B12. Previous studies have chosen a variety of levels to represent high or very high B12 (pmol/l) levels. Some examples include: 664.2¹⁹; 513¹; 700 (high) and 1500 (very high)¹¹; and 601 (high) and 1000 (very high)¹⁰.

How much B12 should an elderly woman take?

Recommended Vitamin B12 Dosage for Seniors

A recent study found that for seniors, a daily dose of 500 micrograms was efficient in reversing the signs of B12 deficiency. In general, experts recommend 2.5 micrograms of vitamin B12 per day for people over the age of 14.

Can high B12 levels cause problems?

In some people, high levels of B12 may cause gastrointestinal problems such as bloating and diarrhea. And if you have high blood pressure or poor cardiovascular health, having too much B12 may further complicate these issues. Pregnant and breastfeeding women may also need to be especially mindful of B12 levels.

Can vitamin B12 cause high blood pressure?

We found that a higher intake of vitamin B12 was associated with lower systolic and diastolic blood pressure and a higher intake of folic acid was associated with lower systolic blood pressure in children.

How much vitamin B12 should a person over 65 take?

Dosages for Older People

Around this age, you should be getting around 2.4 micrograms of B12 a day. Not only does this mean consciously eating foods that contain vitamin B12 but it also means that you should ingest this vitamin as a supplement. By taking supplements, you will ensure that your body absorbs vitamin B12.

Can B12 cause anxiety?

B12 Causes Psychiatric Symptoms: B12 deficiency can cause almost any psychiatric symptom, from anxiety, and panic to depression and hallucinations.

Does B12 cause dementia?

Vitamin B12 has not been proven to cause Alzheimer's or dementia, but studies have shown that increasing B12 intake in women can slow cognitive decline.

How long does it take for vitamin B12 supplements to work?

It may take a few weeks before your vitamin B12 levels and symptoms (such as extreme tiredness or lack of energy) start to improve. If you have hydroxocobalamin injections to boost your vitamin B12 levels at the start of treatment, the cyanocobalamin tablets may start to work within a few days.

What are the symptoms of B12 deficiency?

What are the symptoms of vitamin B12 deficiency anemia?

• 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 happens if you have too little B12?

B12 deficiency can cause a variety of symptoms, including fatigue, headaches, depression, pale or yellow skin, mental impairment, and pain and inflammation in the mouth and tongue. Many of the symptoms caused by low B12 levels are not specific to B12 deficiency, which can cause the condition to go undetected.

Can B12 cause hair loss?

A minimum daily dose of each vitamin is necessary to maintain good health. Significantly exceeding this dose, however, can cause illness. In general, the symptoms of vitamin toxicity include nausea, gastrointestinal problems like constipation and diarrhea, hair loss, rashes, and nerve damage.

Is vitamin B12 good for arthritis?

Vitamin B complex is a type of non-antioxidant vitamin. We don't fully understand how this type of vitamin may treat arthritis-related conditions, but evidence from trials suggests that vitamins B3, B9 and B12 might be of some benefit for treating osteoarthritis, particularly in improving joint mobility and hand grip.

How can I check my B12 level at home?

Most home kits test your urine for the presence of MMA, which is linked to early stages of a vitamin B-12 deficiency. You may need to send your urine sample to a laboratory. These kits will include a jar and mailing instructions.

Is 500 a good B12 level?

The vitamin B12 standard reference range is 200–700 pg/ml whereas the proposed optimal range is 500–1300 pg/ml [10]. Higher vitamin B12 ranges have been associated with increased cognitive function, and reflexes, decreased brain atrophy, confusion, weakness and depression [10].

Can you take B12 and vitamin D together?

Interactions between your drugs

No interactions were found between Vitamin B12 and Vitamin D3.