Can you get too much B12?

While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, higher doses have been found to be safe. Your body absorbs only as much as it needs, and any excess passes through your urine. High doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache.

mayoclinic.org - Vitamin B-12 - Mayo Clinic

What diet is best on Ozempic?

If you experience nausea or other stomach side effects while taking Ozempic, try: eating smaller meals and avoiding fatty foods, fried foods,...

Last updated Oct 21, 2021

How can I get a flat stomach overnight?

5 Hacks to Get a Flatter Belly Overnight #1 Ditch the Sugar. #2 Take a Warm Shower Before Bed. #3 Sip on Ginger or Chamomile Tea. #4 Eat Dinner...

Last updated Apr 5, 2022

Promotion

Overview

Vitamin B-12 (cobalamin) plays an essential role in red blood cell formation, cell metabolism, nerve function and the production of DNA, the molecules inside cells that carry genetic information. Food sources of vitamin B-12 include poultry, meat, fish and dairy products. Vitamin B-12 is also added to some foods, such as fortified breakfast cereals, and is available as an oral supplement. Vitamin B-12 injections or nasal spray might be prescribed to treat vitamin B-12 deficiency. Vitamin B-12 deficiency is not common in the U.S. However, people who follow a vegetarian or vegan diet might be prone to deficiency because plant foods don't contain vitamin B-12. Older adults and people with digestive tract conditions that affect absorption of nutrients also are susceptible to vitamin B-12 deficiency. Left untreated, a vitamin B-12 deficiency can lead to anemia, fatigue, muscle weakness, intestinal problems, nerve damage and mood disturbances.

The recommended daily amount of vitamin B-12 for adults is 2.4 micrograms.

Evidence

Research on the use of vitamin B-12 for specific activities and conditions shows: Heart and blood vessel disease. Researchers had previously believed that vitamin B-12, when combined with folic acid (vitamin B-9) and vitamin B-6, might prevent diseases of the heart and blood vessels by reducing the levels of an amino acid in the blood (homocysteine). However, studies show that the combination of these vitamins doesn't seem to reduce the risk or severity of cardiovascular disease and stroke. Researchers had previously believed that vitamin B-12, when combined with folic acid (vitamin B-9) and vitamin B-6, might prevent diseases of the heart and blood vessels by reducing the levels of an amino acid in the blood (homocysteine). However, studies show that the combination of these vitamins doesn't seem to reduce the risk or severity of cardiovascular disease and stroke. Dementia. Vitamin B-12 deficiency is associated with dementia and low cognitive function, but it's not clear whether vitamin B-12 supplements might help prevent or treat dementia. Vitamin B-12 deficiency is associated with dementia and low cognitive function, but it's not clear whether vitamin B-12 supplements might help prevent or treat dementia. Athletic performance. Unless you have a vitamin B-12 deficiency, there's no evidence that vitamin B-12 supplements will boost your energy or make you a better athlete.

How much weight is 10000 steps a day?

What is 10000 Steps Equal To? “But,” continues Jamie, “if you walk briskly for 30 minutes and include enough activity throughout the day to reach...

Last updated Nov 6, 2022

What should you not drink at night?

Five drinks to avoid before going to bed Alcohol. It's no secret that alcohol makes you feel drowsy after a few drinks. ... Coffee. The caffeine in...

Last updated Jul 4, 2021

Promotion

Our take

Generally safe

Most people get enough vitamin B-12 from a balanced diet. However, older adults, vegetarians, vegans and people who have conditions that affect their ability to absorb vitamin B-12 from foods might benefit from the use of oral supplements. Vitamin B-12 supplements also are recommended for women who are pregnant or breastfeeding exclusively and follow vegetarian or vegan diets.

Safety and side effects

When taken at appropriate doses, vitamin B-12 supplements are generally considered safe. While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, higher doses have been found to be safe. Your body absorbs only as much as it needs, and any excess passes through your urine. High doses of vitamin B-12, such as those used to treat a deficiency, might cause:

Headache

Nausea and vomiting

Diarrhea

Fatigue or weakness

Tingling sensation in hands and feet

Interactions

Possible interactions include:

Aminosalicylic acid (Paser). Taking this drug used to treat digestive problems might reduce your body's ability to absorb vitamin B-12. Taking this drug used to treat digestive problems might reduce your body's ability to absorb vitamin B-12. Colchicine (Colcrys, Mitigare, Gloperba). Taking this anti-inflammatory drug used to prevent and treat gout attacks might decrease your body's ability to absorb vitamin B-12. Taking this anti-inflammatory drug used to prevent and treat gout attacks might decrease your body's ability to absorb vitamin B-12. Metformin (Glumetza, Fortamet, others). Taking this diabetes drug might reduce your body's ability to absorb vitamin B-12. Taking this diabetes drug might reduce your body's ability to absorb vitamin B-12. Proton pump inhibitors. Taking omeprazole (Prilosec), lansoprazole (Prevacid) or other stomach acid-reducing drugs might decrease your body's ability to absorb vitamin B-12. Taking omeprazole (Prilosec), lansoprazole (Prevacid) or other stomach acid-reducing drugs might decrease your body's ability to absorb vitamin B-12. Vitamin C (ascorbic acid) supplements. Taking vitamin B-12 with vitamin C might reduce the available amount of vitamin B-12 in your body. To avoid this interaction, take vitamin C two or more hours after taking a vitamin B-12 supplement.

What is the best time to drink lemon tea for weight loss?

mornings Boosts metabolism: It is said that the best time to consume lemon water are mornings. Mornings are said to be the best time to put in all...

Last updated Sep 17, 2022

Is water the key to a flat stomach?

Drink Plenty of Water Drinking water is key to having a flatter tummy because it helps you feel full between meals, thus reducing overeating, can...

Last updated Apr 13, 2019

Promotion

Your doctor might recommend changing drugs or timing doses to offset any potential interactions. There is a problem with information submitted for this request. Review/update the information highlighted below and resubmit the form. From Mayo Clinic to your inbox Sign up for free, and stay up to date on research advancements, health tips and current health topics, like COVID-19, plus expertise on managing health. Email ErrorEmail field is required ErrorInclude a valid email address Learn more about Mayo Clinic’s use of data. To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and website usage information with other information we have about you. If you are a Mayo Clinic patient, this could include protected health information. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. You may opt-out of email communications at any time by clicking on the unsubscribe link in the e-mail. Subscribe! Thank you for subscribing! You'll soon start receiving the latest Mayo Clinic health information you requested in your inbox. Sorry something went wrong with your subscription Please, try again in a couple of minutes Retry

mayoclinic.org - Vitamin B-12 - Mayo Clinic

How long does it take to melt visceral fat?

Visceral fat is actually easier to lose than subcutaneous fat. This is because it metabolizes quicker and your body can get rid of it as sweat or...

Last updated Jan 30, 2020

Can too much B12 cause weight loss?

There's no solid proof that vitamin B-12 shots, also called injections, help you lose weight. Vitamin B-12 is a water-soluble B complex vitamin....

Last updated Sep 17, 2018

Promotion

Can your primary doctor prescribe you weight loss pills?

Your primary care physician is not likely to give you a prescription for diet drugs immediately. Unhealthy body weight often comes with serious...

Last updated Mar 19, 2022

Learn More »

Promotion

How do I know if I have hormonal fat?

6 signs your hormones are making you gain weight and how to get rid of hormonal belly You feel less satiated after eating. ... You're always...

Last updated May 21, 2022