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Yes .. The oil that u need to avoid are fennel, clary sage, marjoram, tarragon, caraway, cinnamon, thuja, mugwort, birch, wintergreen, basil (estragole CT), camphor, hyssop, aniseed, sage, tansy, wormwood, parsley seed or leaf, and pennyroyal.

Does that means Thieves cannot be used as well?