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when website calculators are missing your EO?

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Zing

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Soap peeps,
I routinely use eocalc and Bramble Berry's calculators for usage rates for essential oils. Sometimes they don't include certain ones. Today I used marjoram which is not on either site. Do folks use other resources? And if your essential oil is not on any resource, do you have a rule of thumb for usage rate? Thanks,
 

AliOop

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Tisserand and Young's "Essential Oil Safety" is the go-to resource; it's a bit pricey, but your library might have it (if it is open). Their website has a free EO safety class, but I don't know whether they would include marjoram as one of the oils discussed.

Sometimes I can also find info on Hopewell Essential Oil's website.
 

lsg

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The supplier should list the maximum safe usage percentage.
 

Mobjack Bay

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Try Aromaweb.com. I learned about it from @Zany_in_CO I think. Here’s the link to the page on marjoram EO. I gave in and bought the Essential Oil Safety book for reference after buying basil EO and a few others that are safe only at fairly low levels.
 
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