# Oxidation when opened

**URL:** <https://discuss.huel.com/t/oxidation-when-opened/169>\
**Category:** Uncategorized\
**Created:** [August 19, 2015, 1:17pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169 "2015-08-19T13:17:03Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![PacoA](https://avatars.discourse-cdn.com/v4/letter/p/9de053/32.png) [@PacoA](https://discuss.huel.com/u/PacoA)\
**Post date:** [August 19, 2015, 1:17pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/1 "2015-08-19T13:17:03Z")

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Hi there:

Regards from Spain, sorry for my poor English.

I am just waiting my first order of Huel. I have been trying Joylent, but I do not like the idea of eating so much maltodextrine. So now I am trying Huel.

My question arises from the large size of Huel’s bag. Huel has vitamins. I wonder whether the content of vitamins decreases when the bag is opened, due to oxidation.

Should be worried about this issue?

Francisco

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**Author:** ![Julian](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.huel.com/julian/32/8153_2.png) [@Julian](https://discuss.huel.com/u/Julian)\
**Post date:** [August 19, 2015, 2:52pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/2 "2015-08-19T14:52:01Z")

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Hey @PacoA

Great questions, yet there will some decrease but that is already taking into account. The shelf life of Huel is 1 year, so if you open for a week or two it shouldn’t be a problem. The pouch only holds 3 days worth, so we expect most user to consumer a pouch in less than 2 weeks.

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**Author:** ![PacoA](https://avatars.discourse-cdn.com/v4/letter/p/9de053/32.png) [@PacoA](https://discuss.huel.com/u/PacoA)\
**Post date:** [August 20, 2015, 2:38pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/3 "2015-08-20T14:38:44Z")

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Thanks for the reply.

However, do you think is a good idea to use a vacuum container if we are not going to use it for, i.e., 4 days?

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**Author:** ![Julian](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.huel.com/julian/32/8153_2.png) [@Julian](https://discuss.huel.com/u/Julian)\
**Post date:** [August 24, 2015, 12:45pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/4 "2015-08-24T12:45:36Z")

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A vacuum container is perfect if you have one and it’s not much hassle but it’s certain not essential.

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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:** [September 2, 2015, 1:01pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/5 "2015-09-02T13:01:20Z")

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Even when opened, the losses of lablile micronutrients will be minimal over as much as a few months. But best keep the puch sealed.

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**Author:** ![stefan](https://avatars.discourse-cdn.com/v4/letter/s/bbce88/32.png) [@stefan](https://discuss.huel.com/u/stefan)\
**Post date:** [March 5, 2016, 9:08pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/6 "2016-03-05T21:08:47Z")

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Hi. I have an opened pouch (it is sealed but has been opened before) it has been sitting like this for 4 months. Should it be okay to use? Thanks!

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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:** [March 6, 2016, 7:46pm UTC](https://discuss.huel.com/t/oxidation-when-opened/169/7 "2016-03-06T19:46:05Z")

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If it’s been stored in a cool dark place, it should be ok.