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Author Topic: Shelf life of Vitamin C  (Read 10468 times)


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Shelf life of Vitamin C
« on: August 25, 2012, 05:25:07 AM »
Hi Sarah,

What is the shelf life of Vit C (L-Ascorbic Acid). I bought it last year (Oct, 2011) and I still have 2 packs.
Can I still use them?



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Re: Shelf life of Vitamin C
« Reply #1 on: August 25, 2012, 06:09:17 AM »
The shelf life of vit. C crystals is three years but in reality they will keep even longer.

Vit. C becomes unstable in a watery solution and that is why the vit. C serum has to be made fresh frequently, whereas the crystals themselves are stable.

You should keep them cool, dry, dark, and in a closed container (close the ziplock bag).