What You Need to Know About B12 on a Vegan Diet

Last Updated: January 1, 2025

when i first came to veganism, i thought about the health benefits of going vegan

B12 is always a source of controversy when it comes to veganism. The common assumption is that vegans don’t get enough B12, and many vegan-opposers use it as an argument against the diet. However, it’s often not as big of a problem as they make it out to be. 

While B12 is important, the idea that “all” or almost all vegans are B12 deficient isn’t true. Read on to learn more about B12 and how to manage it as a vegan.

Key Takeaways

  • Guaranteed B12 deficiency is a common misconception about veganism 
  • It’s easier, thank you think to get B12 as a vegan
  • Everyone should supplement B12, not just vegans
what you need to know about b12 on a vegan diet

Understanding B12’s Role in the Body

Vitamin B12 is a crucial vitamin that contributes to various functions in the body and has several health benefits. 

The key roles of B12 in the body include:

  • Red blood cell formation. It helps form essential red blood cells for the body while preventing anemia and ensuring the body doesn’t produce abnormally large or dysfunctional red blood cells.
  • DNA synthesis. It assists in the replication and maintenance of DNA.
  • Neurological function. B12 helps maintain the nervous system and helps protect the nerves.
  • Energy production. B12 contributes to metabolism throughout the body, helping to convert food into glucose, which the body uses for energy.
  • Mood and mental health. B12 is involved in the production of melatonin and serotonin, both of which are important for mood regulation. 

Signs and Symptoms of a B12 Deficiency

what you need to know about b12 on a vegan diet

B12 deficiency is fairly common among all groups of people, not just vegans. Regardless of your diet and lifestyle, it’s something you must deliberately ensure you’re getting enough of. 

Some common signs of B12 deficiency include: 

  • Weakness and fatigue. Low B12 can mean decreased red blood cell production, which results in reduced oxygen transport to the body’s tissues. This makes you tired and weak.
  • Anemia. Megaloblastic anemia, also connected to the lack of red blood cell formation, may develop if too many abnormally large blood cells are present in the body. Symptoms include shortness of breath, paleness, and dizziness.
  • Cognitive impairment. Too little B12 can cause memory loss, difficulty concentrating, and trouble thinking clearly.
  • Mood changes. A lack of B12 can make you irritable and put you at a higher risk of developing mental health issues like depression.
  • Visual issues. Since B12 helps protect the nervous system, a deficiency can damage the optic nerve, which can cause visual disturbances, such as blurry vision.

How Much B12 do You Really Need? 

The amount of B12 you need varies by age, but the recommended daily intakes are as follows: 

Demographic Age Cohort

Recommended Dietary Allowance (RDA):

Babies 0-6 months

0.4 mcg

Infants 6-12 months

0.5 mcg

Toddlers 1-3 years

0.9 mcg

Children 4-8 years

1.2 mcg

Preteens 9-13 years

1.8 mcg

Teenagers & Adults 14+

2.4 mcg

Pregnant Women

2.6 mcg

Breastfeeding Women

2.8 mcg

Why Everyone Should Supplement B12 

B12 deficiency isn’t just a concern for vegans, it’s something everyone should be wary of. Even those who eat meat are at risk of deficiency simply because our food isn’t as nutrient-dense as it used to be. 

In recent years, the natural content of B12 has declined even in the historically richest sources, like meat and fish. This is due to things like evolving farming practices, changes in the quality of animal feed, and soil depletion. 

As a result, it’s becoming harder to get enough B12 simply from food, regardless of whether you follow a plant-based diet or not. Thus, it’s probably smart for most people to supplement B12 to ensure they’re getting enough.

This is especially true for older adults whose absorption is slowing down and pregnant or breastfeeding women who need extra B12 for the health of the baby!

what you need to know about b12 on a vegan diet

B12 Rich Foods for Vegans

Although the B12 argument is often blown out of proportion, it is something you should pay attention to as a vegan. Plenty of vegan foods offer high levels of B12, and some are incredibly easy to add to your diet! 

  • Fortified plant milk: The exact amount varies by brand, but on average, you can get your daily recommended B12 in a single cup of fortified plant milk. 
  • Fortified cereal: This also varies widely, but most fortified cereals have at least 0.6mcg of B12, which is a great way to start the day. 
  • Nutritional bars: Most nutritional bars have at least 0.5 mcg of B12, while some can have up to 6 mcg. 
  • Meat substitutes: Meat alternatives like a veggie or bean burger can have up to 3 mcg of B12, sometimes more, depending on the brand.
  • Nutritional yeast: Nutritional yeast is a vegan staple. This seasoning adds a tangy, slightly cheesy flavor to salads, sauces, pasta, soups - anything you can think of!

    It’s also loaded with nutrients, including high levels of B12. In most nutritional yeast products, you can get your daily 2.4 mcg of B12 in just two tablespoons.

Choosing the Right B12 Supplements 

If you’re new to B12 supplementation, you must be careful to choose good-quality supplements that will be effective in your body.

These are some of the main things you should look for: 

  • The form of B12: Look for supplements that have methylcobalamin or adenosylcobalamin. These are known for being more bioavailable and better utilized by the body, whereas cyanocobalamin is inferior.
  • Dosage: Ensure that the dosage is correct for your needs. The daily recommended intake is 2.4 mcg, but certain health conditions or medications may require you to take more. Consult with your doctor if you’re unsure.
  • Quality: Choose supplements from companies that follow good manufacturing practices and conduct testing for quality and purity.
  • Certification: Choose supplements that have undergone third-party testing, ensuring the product meets safety and quality standards.
  • Additional ingredients: Always check the label to ensure the product doesn’t contain unnecessary extras, fillers, or allergens.

In addition to looking for these qualities in your chosen B12 supplement, you should watch for red flags, too.

These include things like “proprietary blends,” as they won’t always specify amounts and ingredients, excessive or impossible health claims, unusually cheap prices, and a lack of transparency regarding manufacturing or testing practices. 

Our Favorite B12 Supplement

If you are looking for a great vitamin b supplement, look no further than Performance Lab® B Complex or their NutriGenesis® Multi for men and women.

FINAL THOUGHTS

B12 is a hot topic among the vegan community, and it’s often used as an argument against veganism by those opposed. B12 is important to your health, and the thought of being chronically deficient is overwhelming.

The good news is that it’s not nearly as hard to get enough B12 in your diet as many think! 

With a good supplement and a daily dose of one of the many vegan B12 sources out there, you’ll have no problems meeting your daily intake. It’s one of many things about being vegan that isn’t as scary as they want you to think! 

About the author, Steph

I've been a vegan for many years now and I do it just as much for the animals as for my own health! It started with a need for healing and quickly blossomed into a committed lifestyle choice. I love sharing my knowledge, experience, and passion for it through my writing.

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