20 Best B12 Vitamin On The Market [2024]

Are you looking for the best b12 vitamin on the market? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling b12 vitamin on the market.

We Recommended:

# Preview Product
1 Nature's Bounty Vitamin B12, Supports Energy Metabolism, Tablets, 1000mcg, 200 Ct Nature's Bounty Vitamin B12, Supports Energy Metabolism, Tablets, 1000mcg, 200 Ct
2 Thorne Basic B-Complex - Tissue-Ready Vitamin B Complex Supplement with Choline - Supports Cellular... Thorne Basic B-Complex - Tissue-Ready Vitamin B Complex Supplement with Choline - Supports...
3 Nature Made Vitamin B12 1000 mcg, Dietary Supplement for Energy Metabolism Support, 150 Softgels,... Nature Made Vitamin B12 1000 mcg, Dietary Supplement for Energy Metabolism Support, 150 Softgels,...
4 Pure Encapsulations B12 Folate | Energy Supplement to Support Well Being, Nerves, and Cognitive... Pure Encapsulations B12 Folate | Energy Supplement to Support Well Being, Nerves, and Cognitive...
5 Garden of Life Dr. Formulated Probiotics for Women & Prebiotics, 50 Billion CFU for Women’s Daily... Garden of Life Dr. Formulated Probiotics for Women & Prebiotics, 50 Billion CFU for Women’s...
6 Extra Strength Vitamin B12 Gummy Vitamins, Cherry Flavored B12 Vitamins, 90 Count Extra Strength Vitamin B12 Gummy Vitamins, Cherry Flavored B12 Vitamins, 90 Count
7 Sundown Vitamin B-12, Cellular Energy Support, Vegetarian, Vegan-Friendly 1000 mcg, Non-GMO, Free of... Sundown Vitamin B-12, Cellular Energy Support, Vegetarian, Vegan-Friendly 1000 mcg, Non-GMO, Free...
8 Neuro Gum | Nootropic Energy Caffeine Gum | 40mg Caffeine + 60mg L-theanine + B Vitamins for Energy... Neuro Gum | Nootropic Energy Caffeine Gum | 40mg Caffeine + 60mg L-theanine + B Vitamins for...
9 8 in 1 Immune Support Booster Supplement with Elderberry, Vitamin C and Zinc 50mg, Vitamin D 5000... 8 in 1 Immune Support Booster Supplement with Elderberry, Vitamin C and Zinc 50mg, Vitamin D 5000...
10 Solgar Vitamin B12 1000 mcg, 250 Nuggets - Supports Production of Energy, Red Blood Cells - Healthy... Solgar Vitamin B12 1000 mcg, 250 Nuggets - Supports Production of Energy, Red Blood Cells -...
11 Vitamin B12 by Nature's Bounty, Quick Dissolve Vitamin Supplement, Supports Energy Metabolism and... Vitamin B12 by Nature's Bounty, Quick Dissolve Vitamin Supplement, Supports Energy Metabolism and...
12 Solgar Methylcobalamin (Vitamin B12) 5000 mcg, 60 Nuggets - Supports Energy Metabolism - Body-Ready,... Solgar Methylcobalamin (Vitamin B12) 5000 mcg, 60 Nuggets - Supports Energy Metabolism -...
13 Vitamin B12 Sublingual (Vegan) - Methylcobalamin B12 Vitamins 5000 mcg, B12 Liquid, Liquid B12, B12... Vitamin B12 Sublingual (Vegan) - Methylcobalamin B12 Vitamins 5000 mcg, B12 Liquid, Liquid B12,...
14 Amazon Brand - Revly Vegan Nutritional Yeast Non-Fortified Superfood 15.9 Oz. Powder - 6g Protein,... Amazon Brand - Revly Vegan Nutritional Yeast Non-Fortified Superfood 15.9 Oz. Powder - 6g...
15 Vitamin B12 by Nature's Bounty, Quick Dissolve Vitamin Supplement, Supports Energy Metabolism and... Vitamin B12 by Nature's Bounty, Quick Dissolve Vitamin Supplement, Supports Energy Metabolism and...
16 Vitamin K 100 mcg Supports Bone and Joint Health, 100 Count by Puritan's Pride Vitamin K 100 mcg Supports Bone and Joint Health, 100 Count by Puritan's Pride
17 Nature Made Sublingual Vitamin B12 1000 mcg, Dietary Supplement for Energy Metabolism Support, 150... Nature Made Sublingual Vitamin B12 1000 mcg, Dietary Supplement for Energy Metabolism Support,...
18 Vitamin B12 5000mcg and Vitamin D3 5000 IU Gummies, 60 Count | Delicious Fruit Punch Flavor, Vitamin... Vitamin B12 5000mcg and Vitamin D3 5000 IU Gummies, 60 Count | Delicious Fruit Punch Flavor,...
19 Nature Made Vitamin B12 1000 mcg, Dietary Supplement for Cellular Energy Support, 50 Sublingual... Nature Made Vitamin B12 1000 mcg, Dietary Supplement for Cellular Energy Support, 50 Sublingual...
20 HUM B12 Turbo - Daily Energy Support Supplement - Vitamin B Complex, Calcium Supplement for Mood... HUM B12 Turbo - Daily Energy Support Supplement - Vitamin B Complex, Calcium Supplement for Mood...
SaleBestseller No. 1
Nature's Bounty Vitamin B12, Supports Energy Metabolism, Tablets, 1000mcg, 200 Ct
  • SUPPORTS CELLULAR ENERGY HEALTH (1): Nature’s Bounty B-12 vitamins aid in the conversion of food into cellular energy (1)
  • CARDIOVASCULAR SUPPORT (1): Vitamin B-12 is a commonly used vitamin taken to support the health of the cardiovascular and circulatory systems (1)
  • HELPS MAINTAIN HEALTHY NERVES (1): B-12 plays an important role in maintaining healthy nerve cells (1)
  • EASY TO SWALLOW COATED TABLETS: Nature’s Bounty B-12 tablets are coated, making them easier to swallow
  • FROM THE TRUSTED WELLNESS EXPERTS: Nature’s Bounty Vitamin B-12 tablets are a product of nearly 50 years of dedication to quality, consistency, and...
Bestseller No. 2
Thorne Basic B-Complex - Tissue-Ready Vitamin B Complex Supplement with Choline - Supports Cellular...
  • Nervous System: Promotes an optimally functioning nervous system and healthy nerve cells
  • Cellular Energy: B vitamins promote cellular energy production by supporting the conversion of carbohydrates into energy, as well as the metabolism of...
  • Complete Formula: An optimal balance of eight B vitamins, plus choline, in their active form to enhance absorption in the body
  • Free From: Doesn't contain gluten, eggs, tree nuts, peanuts, dairy, soy, fish, or shellfish
  • Trusted: Thorne is chosen by champions and trusted by 100+ pro teams. Thorne is the only supplement manufacturer to collaborate with Mayo Clinic on...
SaleBestseller No. 3
Nature Made Vitamin B12 1000 mcg, Dietary Supplement for Energy Metabolism Support, 150 Softgels,...
  • Energy metabolism support supplement: contains one 150 count bottle of Nature Made Vitamin B12 1000 mcg Softgels for a 150 day supply(1)
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • These Nature Made Vitamin B12 softgels help break down food into energy that your body can use all day long
  • Vitamin B12 supplements are important for vegetarians and vegans who may not consume enough from diet alone
  • Adults take one B 12 vitamin softgel daily with water and a meal
Bestseller No. 4
Pure Encapsulations B12 Folate | Energy Supplement to Support Well Being, Nerves, and Cognitive...
  • Energy Metabolism: Vitamins B12 and Folate helps convert carbohydrates into energy and break down fats and proteins in the body.*
  • Nervous System Support: Vitamin B12 (methylcobalamin) and folate (L-5-MTHF) support the functionality of the nervous system as well as your hair,...
  • Cognitive Support: Folate is essential for healthy fetal neural development while B12 is an important nutrient for memory and cognitive function.*
  • Pure Quality: Our supplements are made with only premium ingredients sourced from trusted suppliers and guided by our nutritional experts, then...
  • Pure Difference: What makes us different isn't just our process or what goes into our supplements -- what we leave out matters, too. Pure...
SaleBestseller No. 5
Garden of Life Dr. Formulated Probiotics for Women & Prebiotics, 50 Billion CFU for Women’s Daily...
  • LOVE YOUR GUT, LOVE YOUR WHOLE BODY: Our Dr. Formulated Once Daily Women’s Probiotic has prebiotics and probiotics for women, with 16 diverse Lacto...
  • LET’S HEAR IT FOR THE GIRLS: Our Once Daily Women's probiotic supplement is doctor formulated for women's specific health needs, promoting her...
  • YOU GO GIRL: What a relief—our one a day provides Organic prebiotic fiber to help feed good bacteria in the gut and Probiotic strains hand selected...
  • IMMUNE SYSTEM SUPPORT WITH CONVENIENCE IN MIND: Our 50 Billion one a day probiotic for women's immune health comes in a shelf stable, easy-to-swallow...
  • EXPERTLY FORMULATED PREBIOTIC plus PROBIOTIC: Proudly doctor formulated, Third Party Certified Non GMO, NSF Gluten Free and Carbon Neutral and...
SaleBestseller No. 6
Extra Strength Vitamin B12 Gummy Vitamins, Cherry Flavored B12 Vitamins, 90 Count
  • Includes: One 90 ct bottle of vitafusion Extra Strength Vitamin B12 Gummy Vitamins, Cherry Flavored B12 Vitamins (45 Day Supply) to help adults...
  • B12 Gummies for Adults: Adult gummy vitamins that provide Vitamin B12, an essential component for red blood cell formation (1)
  • Nervous System Support Gummies: These gummy B12 vitamins have 3000 mcg of Vitamin B12 to help support energy metabolism and nervous system health (1)
  • Delicious and Convenient: Great tasting and convenient vitamin gummies make a tasty alternative to traditional hard-to-swallow pills and feature a...
  • The No's: Extra Strength Vitamin B12 supplements contain no artificial flavors or sweeteners, no gluten, no high fructose corn syrup, no dairy and no...
Bestseller No. 7
Sundown Vitamin B-12, Cellular Energy Support, Vegetarian, Vegan-Friendly 1000 mcg, Non-GMO, Free of...
  • Product of Sundown, manufactured in United States with select ingredients from around the world.
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • Sundown B-12 Vitamins 1000 mcg Time Release Tablets are vegan-friendly.
  • Vegetarian formula to suit your diet needs.
Bestseller No. 8
Neuro Gum | Nootropic Energy Caffeine Gum | 40mg Caffeine + 60mg L-theanine + B Vitamins for Energy...
  • ENERGY + FOCUS + CLARITY: Neuro Gum caffeine gum’s quick release formulation contains the ideal balance of nootropics designed to give you a clean...
  • QUICK EFFECTS: Our patented cold compression system maximizes the delivery and bioavailability of active ingredients. Get clean energy faster than...
  • NO SUGAR CRASH: Unlike other energy supplements, we only use high quality GRAS ingredients to get you in the zone with clean energy without the sugar...
  • PERFECT ON THE GO: With 9 pieces of optimum energy that fit right into your pocket, you’ll be ready to conquer the world with fresh breath and a...
  • ASPARTAME FREE + SUGAR FREE + NON GMO + GLUTEN FREE: Neuro Gum Energy and Focus increases focus and productivity without ingesting artificial forms of...
SaleBestseller No. 9
8 in 1 Immune Support Booster Supplement with Elderberry, Vitamin C and Zinc 50mg, Vitamin D 5000...
  • 2 Month Supply - 1000mg of Vitamin C, Vitamin D 5000 IU, Elderberry with Zinc 50mg, Echinacea, Turmeric Curcumin & Ginger and B6 Supplement
  • 8 Powerful Immunity Ingredients –New Age has formulated the best potent immune support capsule packed with over 1550mg per serving of the top 8...
  • Packed with Vitamin C & Vitamin D – 1000mg of Vitamin C Supplement and Vitamin D 5000 IU which are both known to be high in antioxidant support and...
  • Proprietary Blend Of Elderberry With Zinc –Exclusively an Elderberry with Zinc and Vitamin C Capsule packed with more than 3x the daily recommended...
  • 2 Month Supply Of The Best Immune Support - Made in America - We are proud that our capsules are made in a certified and inspected lab so you can...
SaleBestseller No. 10
Solgar Vitamin B12 1000 mcg, 250 Nuggets - Supports Production of Energy, Red Blood Cells - Healthy...
  • Along with Folic Acid and Vitamin B6, it supports heart health by promoting healthy levels of homocysteine
  • Required for the normal development and regeneration of red blood cells, which help to deliver oxygen throughout the body
  • Convenient nugget dosage form
SaleBestseller No. 11
Vitamin B12 by Nature's Bounty, Quick Dissolve Vitamin Supplement, Supports Energy Metabolism and...
  • FOR ENERG: 60-count, Vitamin B-12 1000mcg Tablets. Nature’s Bounty Quick Dissolve B-12 vitamins play an important role in energy metabolism in the...
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • FOR YOUR HEART Nature’s Bounty Vitamin B-12 is a commonly used vitamin taken to support the health of the cardiovascular and circulatory systems(1).
  • FOR YOUR NERVES Nature’s Bounty B-12 is an important vitamin for maintaining healthy nerve cells(1).
  • PURITY IS OUR PRIORITY Nature’s Bounty is committed to safety and purity in all our supplements. Our quick-dissolve Vitamin B-12 tablets are...
SaleBestseller No. 12
Solgar Methylcobalamin (Vitamin B12) 5000 mcg, 60 Nuggets - Supports Energy Metabolism - Body-Ready,...
  • Body-Ready B12; Solgar Methylcobalamin (Vitamin B12) 5000 mcg nuggets support general wellbeing; B12 plays different roles in the body to support...
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • Promote Nervous System Health And Support Energy Metabolism; Solgar Sublingual Methylcobalamin nuggets melt under the tongue; Promote normal blood...
  • Naturally Occurring, Metabolically Active; The body can readily absorb B12 as cobalamin, but must further convert to a coenzyme to become...
  • Non GMO, Gluten & Dairy Free, Kosher; Solgar Vitamin B12 Methylcobalamin nuggets are suitable for vegans; A Vitamin B12 free of: gluten, wheat, dairy,...
SaleBestseller No. 13
Vitamin B12 Sublingual (Vegan) - Methylcobalamin B12 Vitamins 5000 mcg, B12 Liquid, Liquid B12, B12...
  • The Only Vegan B12 Vitamins You Need: Besides having shown to support cardiovascular and immune health, Vitamin B12 also provides an extensive list of...
  • Easy-to-Take Sublingual Liquid Vegan B12 in Cherry Flavor: Make no excuses for not taking enough Vitamin B12 supplements because the Basic Greens B12...
  • Most Potent Formulation of B12 as Methylcobalamin Vegan B-12 Vitamin: When you're already taking a vitamin B12 supplement, don't settle for anything...
  • Non-GMO Vitamin B 12 Drops Formulated in the USA: When choosing any dietary supplement, and not just your B12 vitamins, it is important to take note...
  • Basic Greens Sublingual Vegan B12 Vitamins Specially Made for Yo, B12 as Methylcobalamin: We make sure that every bottle of the Vitamin B12 Sublingual...
Bestseller No. 14
Amazon Brand - Revly Vegan Nutritional Yeast Non-Fortified Superfood 15.9 Oz. Powder - 6g Protein,...
  • Vegan, plant based, non-fortified source of 6g protein, amino acids, vitamins and minerals. Nutritional yeast is a low-fat source of protein for vegan...
  • Nutritional yeast dietary supplement (non-fortified)
  • Cheese-like flavor with 6 grams of protein per serving and an array of B vitamins. Often used as a cheese replacement or to add flavor to vegetables...
  • Vegan and gluten free superfood powder with mini flakes
  • Mix 2 tablespoons with water or sprinkle on food. Tablespoon is not included in the container. 30 servings per container
SaleBestseller No. 15
Vitamin B12 by Nature's Bounty, Quick Dissolve Vitamin Supplement, Supports Energy Metabolism and...
  • FOR ENERGY 40-count, Vitamin B-12 5000mcg Tablets. Nature’s Bounty Quick Dissolve B-12 vitamins play an important role in energy metabolism in the...
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • FOR YOUR HEART Nature’s Bounty Vitamin B-12 is a commonly used vitamin taken to support the health of the cardiovascular and circulatory systems(1).
  • FOR YOUR NERVES Nature’s Bounty B-12 is an important vitamin for maintaining healthy nerve cells(1).
  • PURITY IS OUR PRIORITY Nature’s Bounty is committed to safety and purity in all our supplements. Our quick-dissolve Vitamin B-12 tablets are...
Bestseller No. 16
Vitamin K 100 mcg Supports Bone and Joint Health, 100 Count by Puritan's Pride
  • Highest quality vitamins and supplements
  • Product Note: Exposure to heat or sunlight may lead to melting/damage of product. Hence customers are expected to be available during the product...
  • Scientifically formulated
  • Great companion to Calcium and Vitamin D. Health Concern: Heart Health Joint Health & Support Bone Strength
  • Vegetarian, Non-GMO, Gluten and Soy Free
Bestseller No. 17
Nature Made Sublingual Vitamin B12 1000 mcg, Dietary Supplement for Energy Metabolism Support, 150...
  • Energy metabolism support supplement: contains one 150 count bottle of Nature Made Sublingual Vitamin B12 1000 mcg Micro Lozenges for a 150-day...
  • These Nature Made Vitamin B12 lozenges help break down food into energy that your body can use all day long
  • Nature Made B12 sublingual 1000 mcg lozenges are also important for vegetarians and vegans who may not consume enough from diet alone
  • Adults take one Vitamin B12 sublingual 1000 mcg lozenge daily with a meal; place lozenge under tongue until dissolved before swallowing
  • Made in the USA with quality global ingredients, these Vitamin B12 sublingual lozenges have no color added
SaleBestseller No. 18
Vitamin B12 5000mcg and Vitamin D3 5000 IU Gummies, 60 Count | Delicious Fruit Punch Flavor, Vitamin...
  • ✔️ D3 Vitamin 5000 IU + Methyl B12 Gummies For Adults — Not all sources of B12 vitamins are created equal. Our B12 5000 mcg is derived from...
  • ✔️ Supports Energy Production* — Maintaining healthy energy levels is an important part of your overall well-being. Methylcobalamin b12 helps...
  • ✔️ Supports Immune Health* — Vitamin D3 plays an important role in maintaining a healthy immune system*, and with 5,000 IU of Vitamin D3 per two...
  • ✔️ Delicious Gummies In A Fruit Punch Flavor — A delicious way to get your B12 and D3 intake, our gummies make optimizing your health a treat....
  • ✔️ Made With High Quality Ingredients — At Viva Naturals, we know how important your health is to you - and we’re dedicated to delivering you...
SaleBestseller No. 19
Nature Made Vitamin B12 1000 mcg, Dietary Supplement for Cellular Energy Support, 50 Sublingual...
  • Cellular Energy support supplement: contains one 50 count bottle of Nature Made Vitamin B12 1000 mcg Sublingual Lozenges for a 50-day supply
  • These Vitamin B12 lozenges help with nervous system support and proper red blood cell formation
  • Nature Made B12 sublingual 1000 mcg lozenges help convert food into cellular energy
  • Adults take one Vitamin B12 sublingual 1000 mcg lozenge daily with a meal; place lozenge under tongue until dissolved before swallowing
  • Made in the USA with quality global ingredients, these Vitamin B12 sublingual lozenges have no color added and no added preservatives
Bestseller No. 20
HUM B12 Turbo - Daily Energy Support Supplement - Vitamin B Complex, Calcium Supplement for Mood...
  • Vitamins for Energy Support - This turbo-charged vegan vitamin B12 supplement with calcium for women provides crucial support for energy levels and...
  • Whats Inside - Formulated with B12 vitamins, which may provide natural energy support and calcium.*
  • How it works - Vitamin B12 (this formula contains vitamin B12 1000 mcg) may support healthy energy levels, and is crucial for proper brain + nervous...
  • How to Take - Take 1 tablet, daily, with food. HUM B12 Turbo is compatible with other calcium supplements for women and for bone health from HUM...
  • Quality B12 Vitamins with Calcium - Unlike some B12 supplements and calcium supplements, B12 Turbo is vegan, gluten-free and non-GMO.*

Having trouble finding a great b12 vitamin on the market?

This problem is well understood by us because we have gone through the entire b12 vitamin on the market research process ourselves, which is why we have put together a comprehensive list of the best b12 vitamin on the markets available in the market today.

After hours of searching and using all the models on the market, we have found the best b12 vitamin on the market for 2023. See our ranking below!

How Do You Buy The Best B12 Vitamin On The Market?

Do you get stressed out thinking about shopping for a great b12 vitamin on the market? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching b12 vitamin on the market, which is why we have assembled a comprehensive list of the greatest b12 vitamin on the market available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for b12 vitamin on the market that you consider buying. Your questions might include the following:

  • Is it worth buying an b12 vitamin on the market?
  • What benefits are there with buying an b12 vitamin on the market?
  • What factors deserve consideration when shopping for an effective b12 vitamin on the market?
  • Why is it crucial to invest in any b12 vitamin on the market, much less the best one?
  • Which b12 vitamin on the market are good in the current market?
  • Where can you find information like this about b12 vitamin on the market?

We’re convinced that you likely have far more questions than just these regarding b12 vitamin on the market, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for b12 vitamin on the market, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible b12 vitamin on the market. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an b12 vitamin on the market buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available b12 vitamin on the market currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of b12 vitamin on the market has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an b12 vitamin on the market?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your b12 vitamin on the market.
  5. Customer Ratings: Number ratings grade b12 vitamin on the market objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their b12 vitamin on the market.
  7. Product Quality: You don’t always get what you pay for with an b12 vitamin on the market, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an b12 vitamin on the market is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining b12 vitamin on the market information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding b12 vitamin on the market is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What is the best over the counter vitamin B12?

A: Jarrow Formulas Methyl B12. Jarrow Formulas Methyl B12 is a flavored chewable or dissolvable B12 vitamin made with methylcobalamin,which is B12 with the addition of a methyl group. Natrol Vitamin B12. Natrol Vitamin B12 is a powerful vitamin B12 supplement in a dissolvable tablet. … Now Foods B-12. … Nature Made B12. … Garden of Life Vitamin Code Vitamin B12. …

Q: What is the best B12 to take?

A: Oral capsule or tablet Sublingual (dissolved under tongue) Chewable pill Nasal gel Injected intramuscularly by your health care practitioner

Q: What is the best brand of B12?

A: “Taking supplements of vitamin B12 is generally considered safe,” says Dr. Boyer, “because even if you take a higher dosage of vitamin B12, your body will absorb as much as it can then excrete the rest.”

Q: Will too much vitamin B12 cause any side effects?

A: Vitamin B12 is an important vitamin for nerve function, DNA production, cell metabolism, and red blood cell formation. That being said, too much vitamin B12 side effects can include diarrhea, itching, blood clots, numbness in the extremities, and severe allergic reactions. Excessive vitamin B12 may also increase the risk of prostate cancer.