Alternative MethodsConventional Methods


March 29

The Truth About B 12! Popular Myths Debunked

Samuel Carlson
Core Spirit member since Dec 24, 2020
Reading time 4 min.

There has been a heated debate, even among vegans on how much really we need to take a B-12 supplement, or any supplements at all when eating 100% plant-based.

In all honesty, it has been a bit disheartening to see fellow vegans act in a conceited manner, trying to prove a point that absolutely no supplementation is needed if you eat a healthy whole-food, plant-based menu. I believe this is an extremely narrow-minded viewpoint, because it does not take into consideration numerous other life factors, forced onto us by today’s social and environmental living conditions.

Today I would like to focus on b-12, debunking some myths, and clarifying why its deficiency is not a vegan problem only.

Many people believe that B12 only comes from animal flesh and animal secretions (i.e. cow’s milk, chicken eggs…) when in fact it is solely bacteria-based. Fungi, animals and plants are incapable of producing B12 on their own and must obtain it from outside sources. B12 is synthesized by bacteria and is therefore found in areas of bacterial growth, namely dirt and soil.

But in order for the bacteria to make b12 the soil needs to contain the mineral cobalt.

The B12 produced within our guts is too far down our digestive system to be absorbed by our body but is excreted in our feces. Our closest relatives, gorillas, get their B12 from accidental eating of soil (and their own feces) containing B12 when naturally eating their plant-based diet.

Due to declining soil quality from intensive over-farming making the soil deficient in cobalt, and because our vegetables are super-washed (because we would rather not eat soil/manure) vegans don’t get enough B12 without supplementation and fortification.

Early humans received plenty of B12 from the good quality (cobalt-rich) soil that was yet to be intensively farmed and drained of nutrients, and because they drank dirty (“natural”) water from rivers which also contained B12 and B12 producing bacteria.

The declining soil quality isn’t just a problem for humans though — it’s a problem for farmed animals too. Cattle naturally get B12 and bacteria that produces B12 from clumps of dirt around the grass roots, and chickens get B12 from pecking around for worms and other insects.

But most factory-farmed animals are kept indoors and never even see soil during their lifetimes, so would certainly be deficient without supplementation. These horrible artificial conditions make the “vegan diet is unnatural” argument seem somewhat ironic. In fact, around 95% of all B12 supplements manufactured are actually given to farmed animals.

So people who then consume the meat from these animals are just receiving the B12 which originally came from the supplements fed to the animals. Isn’t it far better to simply take a B12 supplement and cut out the middle man?

The “natural” way of consuming B12 — from unwashed vegetables and unfiltered water – isn’t safe for humans because there are also other less desirable bacterias present in these places such as E. coli and salmonella. So in the modern world it’s much safer to just get our B12 from a supplement – don’t fall into the fallacy of thinking “natural” is always better.

The liver can store 3 to 5 years worth of vitamin B12 and we only lose 0.1% of our B12 stores in urine each day so signs of a dietary deficiency aren’t usually immediate.

A B12 deficiency left unfixed is extremely serious, but fortunately B12 supplements are inexpensive and effective.

B12 deficiency isn’t just a problem for vegans

The Framingham Offspring study found that 39% of the general population may be in the low normal and deficient B12 blood level range, and it was not just vegetarians or older people. This study showed no difference in the B12 blood levels of younger and older adults. Most interestingly there was no difference between those ate meat and those who did not. The people with the highest B12 blood levels were those who were taking B12 supplements and eating B12 fortified cereals.

So B12 deficiency isn’t just a problem for vegans. Absorption of B12 requires an intact and functioning stomach, pancreas, sufficient quantities of intrinsic factor, and proper small bowel function. Problems with any one of these organs makes a vitamin B12 deficiency possible. For people who have problems absorbing B12 through their digestive system, injections can be given.

So why are meat eaters at risk for B12 deficiency despite eating meat containing B12?

In order for B12 to be absorbed it needs to attach to a carrier called Intrinsic Factor to pass from the intestines into the blood stream. Intrinsic Factor is made by parietal cells in the stomach. A lack of Intrinsic Factor causes the classic B12 deficiency disease called Pernicious Anemia where the body makes antibodies to attack parietal cells and destroy them.

Until recently we didn’t know why autoimmune disorders like pernicious anemia developed but new research suggests that eating animal products causes animal sugars such as Neu5Gc to become attached to the human cells that line hollow organs such as the stomach.

Our immune system sees any cells with animal sugars on them as foreign

Our immune system sees any cells with animal sugars on them as foreign and makes antibodies to destroy them. This attack by our immune system causes chronic inflammation and may explain many conditions such as atrophic gastritis that destroys both the acid-producing cells and the IF-producing cells in older people who eat meat.

Which might be why many elderly people develop a B12 deficiency regardless of their diet. In fact in the US the Centers for Disease Control (CDC) and the Institute of Medicine recommend B12 supplements for everyone over 50 years old.

Symptoms of a B12 deficiency

  • Weakness, tiredness, or lightheadedness

  • Heart palpitations and shortness of breath

  • Pale skin

  • Smooth tongue

  • Constipation, diarrhoea, loss of appetite, or gas

  • Nerve problems like numbness or tingling, muscle weakness, and problems walking

  • Vision loss

Regardless of your diet it’s always a good idea to get annual blood tests to remain proactive in combating any deficiencies before symptoms are allowed to develop.

Spirulina was once thought to be a source of B12, but unfortunately it actually contains a B12 analogue – an “inactive” B12 that competes with active B12 for absorption, so it may actually speed up a deficiency. Some blood tests also can’t tell the difference between B12 analogues and real B12, so may show adequate levels of B12 even when there is a deficiency.

Because vitamin b12 is water-soluble it’s extremely hard to overdose, and because the body is quite inefficient at absorbing B12, supplements often contain 10,000% RDA, sometimes even 100,000% RDA, to try and ensure the body actually absorbs some of it.

So in summary, it’s so much better to consume a supplement directly rather than first feeding that supplement to an animal and then eating the animal. And it’s easy, convenient and safe to take a B12 supplement, but if you don’t want to take a supplement ensure you’re eating plenty of fortified foods. In the USA, the Centers for Disease Control (CDC) and the Institute of Medicine recommend B12 supplements for everyone over 50 years old, regardless of diet.

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