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I understand.
The important differentiation here is yeast and bacteria. They are not the same.Vitamin B12 can only be produced by bacteria.
It cannot be produced by any yeast cells. So if there is some B12 in nutritional yeast or in beer, it is always added or due to bacterial contamination in the production which is highly unlikely.
Some of the other B vitamins can be produced by yeast, but not B12.You mention the 0,65mcg and I’m guessing you see that in relation to the current EU (it will likely change very soon) daily recommendation of 2 mcg, so my numbers doesn’t add up or seem exaggerated, but that’s due to how the receptor system works.
Apart from 500mcg daily and 2500mcg once a week there is also the option of eating fortified foods.
In that case it is recommended to eat B12-fortified foods three times a day (at each meal), each containing at least 190% of the Daily Value listed on the nutrition facts label (based on the new labeling mandated to start January 1, 2020—the target is 4.5 mcg three times a day).
The easiest, cheapest and safest way is to eat a supplement.
Here are some videos to check out.
https://nutritionfacts.org/video/safest-source-of-b12/https://nutritionfacts.org/video/cheapest-source-of-vitamin-b12/
https://nutritionfacts.org/video/daily-source-of-vitamin-b12/
Simba-
Hi Simba,
thanks again for elaborating!
Can't really watch those videos though to be honest as that guy's voice is just making my head hurt unfortunately.
Vitamin B12 can only be produced by bacteria.
It cannot be produced by any yeast cells. So if there is some B12 in nutritional yeast or in beer, it is always added or due to bacterial contamination in the production which is highly unlikely.
Some of the other B vitamins can be produced by yeast, but not B12...so I did actually contact the brewery and asked them about this; here's what they tell me:
Unsere Weißbierspezialitäten werden nach dem Bayerischen Reinheitsgebot hergestellt, weshalb wir nur die Rohstoffe Wasser, Weizen- und Gerstenmalz, Hefe und Hopfen verwenden. Im Falle von ERDINGER Alkoholfrei wird außerdem noch die aus dem Brauprozess gewonnene Gärungskohlensäure als Zutat genutzt. Zusätze, z. B. von Vitaminen, sind nicht erlaubt, weshalb die wertvollen Vitamine in unseren Weißbieren von Natur aus enthalten sind. Das Vitamin B12 in ERDINGER Alkoholfrei wird über den natürlich vorkommenden mikrobiellen Besatz auf Weizen und Gerste bzw. Malz gebildet. Für dieses Vitamin B12 wurde durch renommierte Wissenschaftler eine Bioverfügbarkeit beschrieben.
"Our wheat beer specialties are made observing the bavarian purity law (...) which forbids adding supplements, including vitamins (...).
The vitamin B12 in Erdinger alcohol-free wheat beer is formed by microbial growth on wheat, barley and malt.
Renowned scientists have attested the bioavailability of this vitamin B12"
salad
Thanks for your reply @Simba.
What I meant was that I (in general) keep up a very healthy and varied diet - and, in addition to that, I take care to include things like nutritional yeast and alcohol free wheat beer, for the B12.
I'm a bit confused now though.
It seems I did wrongly assume that all nutritional yeast products contain the vitamin B12 that I want - though apparently only fortified ones actually do; quoting from the Wikipedia here:
Since nutritional yeast is often used by vegans who may be interested in supplementing their diets with vitamin B12, there has been confusion about the source of the B12 in nutritional yeast. Yeast cannot produce B12, which is naturally produced only by some bacteria.
Some brands of nutritional yeast, though not all, are fortified with vitamin B12. When it is fortified, the vitamin B12 (commonly cyanocobalamin) is produced separately and then added to the yeast.
..regarding the non-alcoholic wheat beer:
I did read that this does not contain any significant amounts of B12.
Yet on the website of my favourite one Erding claims that half a liter gives 0,65 µg -
not that I'd want to drink four of those on a daily basis but still I wonder what's going on here.
Does the yeast in af beer actually contain B12 / can the yeast bacteria actually produce B12? Is their beer "fortified" with vitamin B12?