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Not exactly oil, but just general caution of aerosols.

I was trying to find information about lavender cancer causing properties and instead stumbled on this contaminated aerosol:

https://www.nbcnews.com/health/health-news/lavender-spray-wa...

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Interesting but I guess the key here is that they sprayed something stretched with water. I'm not an essential oils person but I'd guess a pure oil would kill all bacteria.

So I'd suggest better not to buy sprays, rather buy pure stuff and use a diffuser.

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