Cheapest source of vitamin B12

Cheapest source of vitamin B12

“Cheapest Source of Vitamin B12” The cheapest way to
get our B12 is probably one 2500 microgram sublingual,
chewable, or liquid supplement of cyanocobalamin once a week. This stuff is dirt cheap. You can find a twenty-year
supply online for 40 bucks. All the B12 our body needs for $2 a year! Of course, the stuff
doesn’t last twenty years. It has a four-year expiration date, so share it with some friends. For those mathematically-
minded who are thinking, “Wait a sec. “If you only need 4 to 7
micrograms a day, “why do you have to take 2500 a week? ” Well, it’s a little complicated, but let’s do it. Our B12 receptors become
saturated at as little as 1.5. So we can only absorb 1.5 at a time
through our receptor system. But about 1% of the
rest passively diffuses right through our gut
into our bloodstream. So, for those of you
into this kind of thing, let’s do the math. When we take a 2500 microgram dose, we absorb 1.5 through
our receptor system, and then 1% of the 2498.5 that’s left. So, inside our body, we
now have 1.5 plus that 1%, comes out to be about 26.5. You do that once a week, and that averages to
about 4 micrograms a day. So, we should take at least
2500 micrograms once a week. We could take 3000 a week; 5000. If you take too much,
all you get is expensive pee. And at a couple of bucks a year,
it’s not even that expensive. Even though it is a
water-soluble vitamin, we don’t have to take it every day, because throughout our evolution, our bodies were so used to
getting such tiny amounts (maybe some wooly mammoth
pooped upstream or something) that our body devised an
ingenious way to hold onto it. So that’s why we can do this
kind of averaging over time.



  • organicsuperman

    I would not recommend CYANOcobalim as a supplement. METHYLcobalamin would be better.

  • organicsuperman

    CYANO = cyanide molecule. Methyl is more body friendly, there are other forms of B12 that are even better. Personally i don't believe in SYNTHETIC supplementation.

  • organicsuperman

    No problem. Good points. If people must supplement i would always opt for wholefood supplementation. Get a varied diet first and foremost with fresh home made vegetable juice preferably organic consumed frequently. Most synthetic supplements are derived from petrochemical sludge and are manufactured by the pharmaceudical industry, which profits from sickness not health.

  • growingneeds

    So I should drink water from the river with someone pooping upstream? Eww….

  • Lily_Rose

    Too bad our bodies haven't devised an ingenious way to utilize the B12 our own bodies produce. Why would our bodies need B12, produce B12, and then produce it in such a way that we can't absob it? Do some animals produce B12 that they can use, enough that they don't need an outside source?

  • natureasintended

    Did you watch Dr.Greger's Safest Source of B12 video (1 in 6 meat eaters were B12 deficient)? It's seen in all food intakes due to absorption issues / damaged intrinsic factor. I wouldn't worry if without symptoms, but an active B12 test (available online) would be preferable (without supps), to find where you're at; standard blood tests can show false positives. Other supplements are unnecessary where we can gain the nutrients from food. B12 and D may be necessary. They don't contain petroleum

  • organicsuperman


  • Adrian Piloto

    You said at the beginning of the video we need 47 micro grams a day. At the end of the video you say we get on average 4 micro grams a day. What?

  • Adrian Piloto

    Nevermind. 4 to 7 mircro grams. Gotcha.

  • WellingtonBikeCam01

    With the sublingual B12, isn't a significant amount absorbed directly into the blood through the capillaries inside the mouth? Effectively bypassing the digestive tract as a means of absorption?

  • lneasy2

    Isn't it better to take methylcobalimine, since cyanocobalamine must be broken town into methylcobalime in order for functioning levels in the system to use it?

  • Kim Me

    Ive only seen it in 800 mcg dosages. I didnt know we only need 2500 mcg per week. Ive been taking it daily.

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  • Christopher Jarrett

    I'm so confused. My supplement says 25µg which says 1000% of RDA. Yet your saying we should be taking 2500mcg per week? What does 25µg convert to in micrograms? Does anyone know?

  • nonchalantd

    I keep hearing him say in other videos that supplements that don't come from whole foods don't work, but he is fine with recommending Vitamin D and B12 supplements because those can't be obtained from vegetables.  (Vitamin D absorption to the skin is not possible for people living in certain places during certain winter months.)  This seems biased and hypocritical.  If D and B12 supplements work, then why doesn't he recommend other vitamin supplements?  

  • lneasy2

    Why cyanocobalamin? Cyanocobalimin must be broken down by the body to the highly absorbable methylcobalamin and releases cyanide duirng the process. Why not just take methylcobalamin and skip the whole breakdown and release of a potential poison?

  • Anne Tehemara

    Hello Dr Greger, I am allergic to cobalt, what else could I take?

  • Calvin Sylveste

     so mammoth poop is a good source of vitamin B12?

  • Stan Murray

    Look, you've answered the whole Vegan argument right here.
    If a strict vegan diet is right for the human body—why take artificial supplements?

    B12 has  been identified as an essential component for health that a strict vegan diet doesn't provide- only because it was found that a deficiency will lead to a prolonged,  painful, white-haired tingly death.
     There are probably lots of components in meat that haven't been discovered yet.
    Why do chimps- our closest cousins eat meat when the need arises?
    Cows and sheep are strict vegetarians-

    You quote how healthy the Ugandan diet is- based  exclusively on maize and vegetables—- You forgot to mention the universal love of bush meat in that area.
    One shouldn't be so dictatorial or prescriptive in what's good for everyone?

  • Baron Ockslite

    Well this is interesting. I've been taking 2500 mcg a day lol

  • sooooooooDark

    i read thru the article he cited on his website regarding this ( )
    and on page 694 (2nd page of that document…so u dont actually need to scoll that much!)

    "Requirement is 0.7-2.0 µg/d across the life span" (im not talking about special cases that are regard the elderly…also mentioned in the article)

    "whereas the respective Recommended Dietary Allowance is Allowance is 0.9–2.4 µg/d." (<- This is regarding dietary allowance/INTAKE not how much ur body needs to absorb(!!)

    if i remember correctly he said 7.0µg/d is "optimal" in another video (rather than the 2.4µg/d mentioned in the quoting before)

    but….he recommends 2500µg/w or 250µg/d

    where i come from 7µg/d > 250µg/d

    some may say now "no nooo u made a mistake that what u said isnt regarding the absorption"…seriously read the article and the lable of ur vitamin b12 supplements which give like 30µg = 1200% recommendations (they apparently still calc with 2.4µg/d)

    tl;dr: he mixed up intake/absorption in a weird way which made him give a ~35-fold recommendation

    oh and btw something just came to my mind when i wanted to post
    this….maybe…he simply fucked up with the "µg" since they constantly
    talk about numbers like 2.4µg/d…maybe he means…2.5µg/d and not
    ( )
    also something weird regarding the graphics hes using at 2:00 into the video:
    it says 99.9 % are reabsorbed into the body…but wait a minute… didnt he just say @ 1:44 that u simply get expensive pee from eating alot of it? so is it reabsorbed nearly completely…or peed out?
    or is the absorption regarding just the parts that are actually used by the body (the 2.4-7 µg/d i mention above)

    i know these are a lot of numbers and reading thru scientific papers isnt the easiest job but i hope at least 1 will find what i wrote useful and try to proof me (or him?) wrong

  • BonⓋista

    HELP: Where can I get this B12 that is so friggin cheap? I seem to find it nowhere here in Germany in this price class. Thanks in advance.

  • Panepalarama Euripides

    This is critical to keep radioactive cobalt 60 from Fukushima from destroying your nerves!

  • JennOscura

    Good to know that I only need to take my B12 once a week. I haven't been taking it daily; just whenever I remember. Good to know that it's not an issue.

  • R.B.

    Would someone link to where we can buy it?

  • Jessica Duncan

    Dr. Greger my name is Sherrick Duncan I am a husband and a father of four.

    I worked hard and saved up and made payment for years and now own two acres in Oklahoma and am starting to grow my own food so that I can get off of food stamps and section8 welfare.

    I did all this so we can afford to eat a mostly plant based diet (I would do all plant based but it conflicts with my 100% self sufficiency self reliance prepper goals) so I have a question.

    If I eat like 98% plant based but only eat as much animal products as absolutely necessary to get a self sufficienct b12 source off of eithet eggs or whatever the best animal product b12 source is how much and how often maximum/minimum would one person need to ingest of animal product a week, month, year to get there necessary b12?

    I am absolutely 100% unwilling to do b12 injections or sublingual drops or foods or drinks that are fortified because (UNLESS I can grow or produce the b12 supplements myself) which from my studies I cant, then it violates my self sufficiency goal.

    So my question is what is the maximum/minimum amount of whatever the animal product highest in b12 would I need to eat how much and how often only to get my b12 needs from our farm raised animals?

    In other words I want to know how much of and what animal product that i can produce myself to eat to get all my b12 but little enough of this animal product to get the absolute minimum to no damage to my body or health.

  • George Louis

    Wrong. All rivers, lakes and streams are saturated with Vitamin B12. We don't need prehistoric creatures to poop in them since fish do that anyway and their is a ecosystem in those natural bodies of water not to mention some of the soil run off into them. We didn't evolve. God made us so that we can store up nutrients so we can travel. People in the desert for example can travel the desert with nutrients stored up in their livers.

  • Cihan Kenar

    Doc, so where is the link to this super cheap source of B12? I really want to get it!

  • me.echy5

    does age matter

  • Love Story

    Just a question! I had my blood tests done at the Barnard Medical center here in DC and my b12 levels were quite low. I have been vegan for 6 years and vegetarian on and off over the previous 40. I bought a vegan b12 spray at whole foods that cost $18 for 2oz! I need a lower cost option! Any tips on brands and where to buy…besides the amazon big supply? Aimee

  • D

    ''cyano'' is SYNTHETIC!! ''Methylcobalamin'' is Natural. why dont you mention that???

  • simbirtv

    isn't Methylcobalamin better?

  • Eddie MacD

    It's not about the cheapest, but most effective and efficient. If it is true that cyanocobalamin must be converted by our body into methylcobalamin, surely it is wiser to use methylcobalamin. The side benefit is no cyanide.

    This is always the problem where money is involved. Chemically these 2 types are identical apart from the obvious. So why is Dr. Greger in favour of cyanocobalamin?

  • Mountain Creek

    internet…. FoodScience of Vermont Superior B-12

  • Robyn Alice

    Oh good lord I love this video. Subscribed in hopes of seeing more.

  • Bio Hacker

    does nutrition yeast cover b12 aswell?

  • Spider Salticidae

    in theory a person could collect his or own feces dry it and bake it and consume it.

  • fuckfannyfiddlefart

    The image says "…bound to animal protein". That's disturbing!

  • Infidel

    What about the new study, that says, high doses of B12 (>20mcg/day) increases the risk of lung cancer? Mr. Greger recommends taking much more.

  • Justin Case

    I highly recommend you go to ,
    This website has all the LATEST most ACCURATE SCIENCE of nutrition .
    for non profit , Dr Greger has dedicated his life to helping people get the latest and most accurate science
    Happy Healthy to you !

  • Erika Marrs

    Thank you! I've been needing this info for a long time xD

  • Ellen

    you should not take cyanocoablamin, it is synthetic B12. Methylcobalamin is better to take as supplement, liquid sublingual work best I think in my opinion and tablet sublingual also work great. Cyanocobalamin contains small amounts of cyanide. No one needs that either.

  • VegRunner 66

    Hi. That last info graphic is showing a gallbladder as part of the efficient B12 reabsorption process. I no longer have a gallbladder… am I more at risk for deficiency? Thanks.

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  • Nasser

    Does b-12 raise the risk of lung cancer? We didn't know anything about that, until NOW….

  • moplet72

    I get horrible acne with b12 supplements.

  • sejel vinwozb

    Where can I find the study?? I would love to read it

  • John Corney

    Can Dr. Greger review and comment on this post that cautions against using cyanocobalamin? Thank you.

  • Susan

    If stomach acid is not right taking b 12 by mouth isn't going to help..

  • Gervasio Chiazzo

    Not very cheap in Argentina. It would be interesting to find out why.

  • Jams Saint

    What about pills??

  • george mueller

    I would like a link to buy this cheap B-12 too. Thanks.

  • Seven Ellen

    This is all very informative, but, as an English person, I need to ask the all-important question here which is how much Marmite does that amount to? 🙂

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