Is 1000 mg of B12 too much daily?

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.

Is it OK to take 1000 mcg of B12 daily?

The most common treatment for pernicious anemia is lifelong vitamin B12 injections, but small amounts of vitamin B12 are absorbed without intrinsic factor. One review concluded that taking 1,000 mcg daily is an effective alternative to injections ( 42 ).

What are the side effects of B12 1000 mcg?

Is it OK to take 1000 mcg of B12 a week?

As with any supplement it is prudent not to take more than is required for maximum benefit, so intakes above 5000 micrograms per week should be avoided despite lack of evidence for toxicity from higher amounts.

What happens when vitamin B12 is very high?

High. 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.

Can vitamin B12 damage your liver?

Vitamin B12 therapy has not been linked to ALT elevations or to clinically apparent acute liver injury. Likelihood score: E (unlikely cause of liver injury).

Can you overdose on vitamin B12?

You cannot overdose on vitamin B12 because any excess you simply pee out. If you get b12 shots, you may experience side effects like dizziness, nausea, and fatigue. It is possible to have elevated B12 levels in blood tests, which may indicate cancer or diabetes.

Does vitamin B12 cause weight gain?

Despite the numerous processes in which vitamin B12 is involved, there's little evidence to suggest that it has any influence on weight gain or loss.

How much B12 should a woman over 50 take daily?

The latest guidelines recommend 2.4 micrograms per day of vitamin B12 for those aged 51 and older. Most daily multiple vitamins supply this amount.

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.

Can too much B12 cause neuropathy?

Thus, vitamin B12 may be associated with both sensory and motor peripheral nerve function. In older adults, the prevalence of poor peripheral nerve function and neuropathy is high and increases with age^18–21.

How do I know if I need more B12?

Constipation, diarrhea, loss of appetite, or gas. Nerve problems like numbness or tingling, muscle weakness, and problems walking. Vision loss. Mental problems like depression, memory loss, or behavioral changes.

Does B12 help hair growth?

One of those vital nutrients is B12, also known as cobalamin. B12 promotes healthy hair growth by assisting in the production of oxygen-rich red blood cells, which feed hair follicles.

What are the symptoms of low B12?

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 ...

Can B12 hurt your kidneys?

In April, the Journal of the American Medical Association (JAMA) published a study that looked at whether high doses of B vitamins (folic acid, B12, B6) helped people with kidney disease due to diabetes. The study found that high doses of these vitamins were actually harmful.

Can B12 cause blood clots?

Population research suggests that having low levels of vitamin B12 might be linked to an increased risk for blood clots in the veins.

Can too much vitamin B12 cause inflammation?

Vitamin B-12 can cause very rare but serious allergic reactions (anaphylaxis). This includes swelling of the face, tongue, and throat, and difficulty swallowing and breathing. If this occurs after you take vitamin B-12, call 911 or your local emergency services immediately.

What should a women's B12 level be?

Normal values are 160 to 950 picograms per milliliter (pg/mL), or 118 to 701 picomoles per liter (pmol/L).

Is B12 level of 2000 too high?

But a normal level of vitamin B12 in your bloodstream is generally between 190 and 950 picograms per milliliter (pg/mL). Between 200 to 300 pg/mL is considered borderline and your doctor may do more testing. Below 200 pg/mL is low and more testing is needed.

How do you flush B12 out of your system?

Drink lots of water. It is water soluble. It will flush out from your body. Avoid any B12 supplements.

Should I take B12 in the morning or at night?

Vitamin B12

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.

What does B12 do for a woman?

Vitamin B12 is an essential nutrient that helps the body create DNA, nourishes the brain and nervous system, and assists with the formation of healthy red blood cells. The nutrient occurs naturally in meat, fish, and dairy products, and can be created in a laboratory.

How do you know B12 is working?

To see how well your tablets are working, your doctor may ask you about symptoms such as tiredness and lack of energy. You may also have regular blood tests to monitor the levels of vitamin B12 in your blood.