Yellowing of essential oil containing product
Hi, I am formulating a clear transparent massage oil containing eucalyptus oil. After 2 years of storage the product turns into a shade of yellow. Some reading suggests oxidation/polymerisation of essential oil. Any suggestion what is the antioxidant that is suitable? Or could it some other problem that causes the colour change?
Full formula:Liquid paraffinMentholEucalyptus essential oil
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