Who should not take B12 supplements?

Who should not take VITAMIN B-12?
  • low amount of potassium in the blood.
  • Leber's hereditary optic atrophy.
  • inflammation of the stomach called atrophic gastritis.
  • past history of complete removal of stomach.


Who should not use vitamin B12?

You may need to take vitamin B-12 separately from the above drugs and supplements — say, one in the morning and one at night — so you can get the full dose of vitamin B-12. Don't take vitamin B-12 supplements if you have sensitivities or allergies to vitamin B-12, cobalt, and any other ingredients.

Is there any side effects to taking vitamin B12?

High doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache. Nausea and vomiting. Diarrhea.


Can a B12 supplement hurt you?

Vitamin B12 has a low risk of causing harm, even at high doses. Because of this, there's currently no maximum dose that's widely recommended. However, some forms of vitamin B12 (mainly injectable and nasal B12) can cause headache or fatigue at normal doses.

Can anyone take B12 supplements?

When taken by mouth: Vitamin B12 is likely safe for most people. Vitamin B12 is considered safe even in large doses. When applied to the skin: Vitamin B12 is likely safe for most people when used appropriately. When sprayed into the nose: Vitamin B12 is likely safe for most people.


Synthetic vs Natural Vitamin B12



How do you know if you need B12?

Symptoms of vitamin B12 deficiency

If you have anaemia caused by a vitamin B12 deficiency, you may have other symptoms, such as: a pale yellow tinge to your skin. a sore and red tongue (glossitis) mouth ulcers.

Can I take B12 without doctor?

Supplements are easily available over the counter either in combination with B-complex supplements or alone in the form of cyanocobalamin. However, it is not recommended to consume vitamin B12 supplements without consulting a doctor as they can interfere with some other medicines.

What happens if your B12 is too high?

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 B12 cause neuropathy?

B12 deficiency may cause demyelination of nerves in the peripheral and central nervous system13 and has been associated with peripheral neuropathy, loss of sensation in peripheral nerves, and weakness in lower extremities in older adults1, 1416.

What does low B12 feel like?

Key points about vitamin B12 deficiency anemia

Without enough red blood cells, your tissues and organs don't get enough oxygen. Without enough oxygen, your body can't work as well. Symptoms include weak muscles, numbness, trouble walking, nausea, weight loss, irritability, fatigue, and increased heart rate.

What vitamins should not be taken together?

What vitamins should not be taken together?
  • Magnesium and calcium. ...
  • Iron and green tea. ...
  • Vitamin C and B12. ...
  • Fat-soluble and water-soluble vitamins. ...
  • Vitamin D, vitamin K2, and other fat-soluble vitamins. ...
  • Magnesium and vitamin D3. ...
  • Copper and zinc. ...
  • Omega-3s and vitamin E.


Can B12 cause blood clots?

Vitamin B12 and Health

Vitamin B12 is involved in the breakdown of a protein called homocysteine. High homocysteine levels are associated with an increased risk of heart disease and stroke as it may promote the formation of blood clots and excess free radical cells, and may impair normal blood vessel function.

Can vitamin B12 cause heart problems?

Macrocytosis associated with vitamin B12 deficiency is also associated with fatal and non-fatal coronary disease, myocardial infarction, stroke, and other circulatory health problems.

Why should you not take vitamin C and B12 together?

Vitamin C and B12

According to Dr. Airey, some studies have shown that Vitamin C could break down Vitamin B12 in your digestive tract, reducing your B12 absorption. As a result, he says you want to wait at least two hours before taking Vitamin C with your Vitamin B12.


Can vitamin B12 damage your liver?

Vitamin B12 therapy has not been linked to ALT elevations or to clinically apparent acute liver injury.

Can B12 cause tingling in feet?

Tingling hands or feet

Vitamin B-12 deficiency may cause “pins and needles” in the hands or feet. This symptom occurs because the vitamin plays a crucial role in the nervous system, and its absence can cause people to develop nerve conduction problems or nerve damage.

Can too much B12 cause numbness and tingling?

In rare cases, people who take high doses of vitamin B for a long period of time may experience extreme numbness or a tingling sensation. In some patients, tingling sensation is experienced mostly in the right side of the body. This symptom is one of the early warning indicators of Vitamin B12 overdose.


Can B12 cause leg pain?

B12 deficiency affects sensory nerve function leading to motor dysfunction, which can cause muscle cramps and weakness.

Which fruit is rich in vitamin B12?

Fruits like apples, bananas, blueberries and oranges are some fruits that are high in vitamin B12.

How long should I take B12 supplements?

You may be able to stop taking cyanocobalamin when your vitamin B12 blood levels are back to normal. However, you may need to take it for the rest of your life if your diet does not have enough vitamin B12 or you cannot absorb enough vitamin B12 from your food.


Is it OK to take 1000 mcg B12 daily?

Even the lowest doses in B12 supplements are many times the recommended dietary allowance. Doses up to 1,000 mcg, though unnecessary, aren't harmful.

Should you 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 food is highest in B12?

Vitamin B12 is a key nutrient that your body needs for many essential functions. It's found in large amounts in animal products, fortified foods, and dietary supplements. Some of the richest sources are liver, beef, sardines, clams, and dairy products.


What is vitamin B12 good for?

Vitamin B12 is a nutrient that helps keep your body's blood and nerve cells healthy and helps make DNA, the genetic material in all of your cells. Vitamin B12 also helps prevent megaloblastic anemia, a blood condition that makes people tired and weak.

What is the most common cause of B12 deficiency?

Diet. Some people can develop a vitamin B12 deficiency as a result of not getting enough vitamin B12 from their diet. A diet that includes meat, fish and dairy products usually provides enough vitamin B12, but people who do not regularly eat these foods can become deficient.