# B12 source in Huel

**URL:** <https://discuss.huel.com/t/b12-source-in-huel/6962>\
**Category:** Nutrition\
**Created:** [August 2, 2017, 10:06pm UTC](https://discuss.huel.com/t/b12-source-in-huel/6962 "2017-08-02T22:06:58Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![srjuanjo](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.huel.com/srjuanjo/32/8524_2.png) [@srjuanjo](https://discuss.huel.com/u/srjuanjo)\
**Post date:** [August 2, 2017, 10:06pm UTC](https://discuss.huel.com/t/b12-source-in-huel/6962/1 "2017-08-02T22:06:59Z")

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On launching v2.0, huel used methycobalamin rather than cyanocobalamin as vitamin B12 source and then you switched back to cyanocobalamin.

could someone explain which one is a better source of b12, as far as I know methycobalamin is more efficient than cyanocobalamin and stay for longer in the body however cyanocobalamin has to be converted to methycobalamin by the liver (heavy smoker for instance are not good in that conversion).

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**Author:** ![JamesCollier](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.huel.com/jamescollier/32/5725_2.png) [@JamesCollier](https://discuss.huel.com/u/JamesCollier)\
**Post date:** [August 3, 2017, 8:25am UTC](https://discuss.huel.com/t/b12-source-in-huel/6962/2 "2017-08-03T08:25:07Z")

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We tried with methylcobalamin as it is a ‘natural’ form of B12. However, data on the efficiency of its absorption is not wholly convincing and we were concerned that it might not supply enough. Therefore we reverted back to cyanocobalamin which is proven to be highly bioavailable.